Abstracts 31:1-4

Contents Volume 31 (2002) – Issue 1-4

Belle, J.
Commented checklist of the Odonata of Surinam
p. 1-8.

A list is given of 283 spp. and sspp., refrable to 87 genera of 15 families. Some additional taxa are evidenced but remain unidentified. Notes are supplied on some spp.;Hetaerina cruentata (Ramb.), Argia extranea (Hag.), Phyllocycla signata (Hag.), Phyllogomphoides audax (Hag.), Dythemis sterilis Hag., D. velox Hag., Erythrodiplax attenuata (Kirby), E. ochracea (Burm.), E. aequatorialis Ris and Perithemis waltheri Ris are deleted from the national list.

Beukema, J. J.
Survival rates, site fidelity and homing ability in territorial Calopteryx haemorrhoidalis (Vander Linden) (Zygoptera: Calopterygidae)
p. 9-22.

In a small isolated population along a small stream in NE Spain, a high proportion of the adults present were individually marked. During subsequent days, their locations were assessed by twice-daily surveys along the entire length of the stream. Mean daily survival rates in mature males and females and pre-reproductive males were similar, 94%. Only during the first day after marking were survival rates significantly lower (viz. 77 to 84% in the various groups). High proportions (around 90%) of mature males were found to return to the same (territory) site every morning once they had occupied that site for 2 or more days. Site fidelity was low in pre-reproductive males and intermediate in mature females. In a displacement experiment, 67 territorial males were transferred one by one to distant locations (80 to 240 m along the stream). Half of them returned to their original territory, usually on the same day.

Carvalho, A. L.; Werneck-De-Carvalho, P. C.; Calil, E. R.
Description of the larvae of two species of Dasythemis Karsch, with a key to the genera of Libellulidae occurring in the states of Rio de Janeiro and Sao Paulo, Brazil (Anisoptera)
p. 23-33.

The ultimate instar larvae of D. mincki and D. venosa are described and illustrated, based on material from SE Brazil, and general notes on the breeding habitats are provided. A preliminary key to the genera of Libellulidae larvae occurring in the region is appended.

Novelo-Gutierrez, R.
Larvae of the ophibolus-species group of Erpetogomphus Hagen in Selys from Mexico and Central America (Anisoptera: Gomphidae)
p. 35-46.

Detailed descriptions and illustrations of Erpetogomphus agkistrodon Garrison, E. erici Novelo and E. ophibolus Calvert are provided and a comparison with other larvae of the subgenus Erpetocyclops Carle is also included. Larvae of E. agkistrodon and E. erici show the closest resemblance, while E. ophibolus is more similar to E. constrictor.

Tembhare, D. B.; Wazalwar, S. M.
Stomodeal cuticular structures in the dragonfly Brachythemis contaminata (Fabricius) (Anisoptera: Libellulidae)
p. 47-54.

Light and scanning electron microscopic studies reveal various stomodeal cuticular structures. In the larvae and adults, microspines on the surface of the longitudinal folds of the pharynx, and dome-shaped, beaded structures on the inner surface of the oesophagous are evident. In the larvae, the folds of the crop bear long hairs laterally and parallel rows of microspines medially. In the larvae, the proventriculus is provided with 4 longitudinal plates; 2 large plates with teeth on each lateral side and 2 small plates each with 4 fine apical teeth, on either side. Scale-like acanthae are observed near the stomodeal valve. A whorl of long hairs is evident in the stomodeal valve. In the adult dragonfly, the acanthae and curved spines occupy the anterior and posterior regions of the proventricular dental plates, respectively. The functional significance of various stomodeal cuticular structures is discussed.

Wildermuth, H.; Knaus, P.
The impact of incidental summer snowfall on two Alpine metapopulations of Somatochlora alpestris (Selys) (Anisoptera: Corduliidae)
p. 55-63.

In the course of a 2-yr mark-resighting study on S. alpestris at 2000 m a.s.l. in the Central Alps of Switzerland snow fell during the beginning of the reproductive period in July 2000. The snow cover was up to 30 cm thick and remained for about 8 days. Only 3% of the individuals marked as tenerals and 4% of those marked as matures before the cold spell were resighted afterwards. In 1998 (a season without snow) the corresponding resighting proportions amounted 10% and 54% respectively. In 2000, at a second study site at 1700-1800 m, 11% of the individuals marked as matures before the cold spell were found again. It is concluded that, unlike the aquatic stages, the imagines of S. alpestris are not well adapted to survive cold periods with snowfall lasting more than a few days. Various survival strategies focused on egg and larval development of the sp. are discussed with respect to adaptation to a subarctic climate.

Wilson, K. D. P.
Notes on Chlorogomphidae from southern China, with descriptions of two new species (Anisoptera)
p. 65-72.

Chlorogomphus shanicus sp. n. and Chloropetalia soarer sp. n. are described and illustrated from north Guangdong, China. Chlorogomphus icarus Wilson and Reels is synonymised with C. usudai Ishida and C. papilio Ris is illustrated.

Daigle, J. J.
Telebasis gigantea spec. nov. from Bolivia (Zygoptera: Coenagrionidae)
p. 73-76.

The new sp. is described and illustrated (holotype male: Santa Cruz dept., Ichilo prov., Buena Vista, Feb. 2000; allotype female: same data as holotype). Holotype deposited in Universidad Autonoma “Gabriel Rene Moreno” (U.A.G.R.M.) in Santa Cruz, Bolivia; allotype deposited in Gainesville, Florida, USA. male and female can be distinguished by their very large size, dull gold thorax, and facial color which is sky-blue in male but yellowish-blue in female.

Perepelov, E.; Bugrov, A. G.
Constitutive heterochromatin in chromosomes of some Aeshnidae, with notes on the formation of the neo-XY/neo-XX mode of sex determination in Aeshna (Anisoptera)
p. 77-83.

C-stained male karyotypes of Aeshna crenata (2nmale=27; X0), A. grandis (2nmale=26; neo-XY), A. juncea (2nmale=26; neo-XY), A. nigroflava (2nmale=27; X0) and Anax imperator (2nmale=27; X0) from W Siberia, N Caucasus, Russian Far East and Hokkaido (Japan) are figured and analyzed.

Weihrauch, F.; Borcherding, J.
The zebra mussel, Dreissena polymorpha (Pallas), as an epizoon of anisopteran larvae (Anisoptera: Gomphidae, Corduliidae, Libellulidae)
p. 85-94.

A list of records of anisopteran larvae and final instar exuviae with attached zebra mussels is provided. It contains records of 29 specimens from 10 spp. with zebra mussels including 2 new records. The possibilities how this association between odonate larvae and zebra mussels comes into being are discussed. Considering the biology and the life history of the mussels, from a few of the recorded cases of this interaction it is assumed that the larval development of the Odonata involved is more variable than hitherto known.

Cordero Rivera, A.; Egido Perez, F. J.; Andres, J. A.
The effect of handling damage, mobility, body size, and fluctuating asymmetry on lifetime mating success of Ischnura graellsii (Rambur) (Zygoptera: Coenagrionidae)
p.  117-128.

Several spp. of odonates have been the subject of sexual selection studies. In non-territorial species most variance in lifetime mating success (LMS) is accounted for by lifespan and specially by the number of visits, and random factors (like rainy weather) can have strong effect on reproductive success. Here we present the study of 2 natural populations of I. graellsii by marking-recapture methods. Our results show that male mating success is related to body size, mobility and handling damage, but not to fluctuating asymmetry. Larger males had greater success in both populations, a result in agreement with previous findings on the same sp. Nevertheless, multivariate analyses indicate that body length was a significant correlate of LMS in just one of the studied populations. We estimated a mobility index for males averaging the distance between consecutive resightings. For long-lived males, we found a positive relationship between mobility and LMS. There was a clear effect of leg loss during marking on survivorship, and a marginally significant negative effect on LMS. Finally, we studied the effect of wing fluctuating asymmetry (FA) on LMS by capturing a sample of marked individuals at the end of field work. Results suggest that FA is not an important correlate of LMS in this sp.

De Marco, P.; Resende, D. C.
Activity patterns and thermoregulation in a tropical dragonfly assemblage
p.  129-138.

Solar exposure is a key factor determining odonate activity, particularly in tropical areas. Small sized perchers, classified as thermal conformers, can begin their activity when air temperature is sufficiently high, and larger species become active when direct exposure to the sun is possible. In this study, the activity patterns in a neotropical dragonfly assemblage present on the Federal University of Vicosa, SE Brazil, have been described and following predictions about their thermoregulatory behaviour tested: (a) a decrease in activity of the percher dragonflies in the warmest periods is expected due to high thoracic temperatures; (b) conformers species will be controlled by temperature, not luminosity, whereas in heliothermic species, the initiation and termination of their activity is only constrained by luminosity. In the dry season, low air temperatures represent a limiting factor to the beginning and the end of activity, resulting in a shorter total activity time. Orthemis discolor and Micrathyria hesperis showed a decrease in activity in the middle of the day in the rainy season. Perithemis mooma was the only sp. that had a higher abundance near midday. As this sp. had a light-coloured thorax compared to the others, it is suggested that it could minimize the effect of the high temperatures. There is a clear effect of season on activity time, and also large differences in the intensity of this effect among species. When clouds precluded direct exposure to sun, variations only in the temperature did not affect the activity of Erythrodiplax fusca, M. hesperis and O. discolor, but the activity of the small sized P. mooma remained dependent on temperature. These results highlighted that the minimum body size to be a heliotherm could be a complex function of behavioural and morphological characteristics, including body colour, preferred substrate and perch posture.

De Marmels, J.
A study of Chromagrion Needham, 1903, Hesperagrion Calvert, 1902, and Zoniagrion Kennedy, 1917: Three monotypic North American damselfly genera with uncertain generic relationships (Zygoptera: Coenagrionidae)
p. 139-150.

Comparative morphology identifies Chromagrion as the sister genus of Pyrrhosoma Charp. The genera Hesperagrion, Anisagrion Selys, Apanisagrion Kennedy and Calvertagrion St. Quentin probably form a monophyletic group as they share a bifid apical penis segment armed with a pair of sclerotized spine-like processes. A new interpretation of certain penis structures, and biogeographic considerations, suggest that Zoniagrion is probably a primitive genus, which occupies a basal position on the stem of the Acanthagrion-series, within the ischnurine Coenagrionidae.

Samways, M. J.
Red-listed Odonata of Africa
p. 151-170.

The Red-Listed African Odon. spp. are re-assessed and are assigned or re-assigned to the IUCN Categories of Threat. It is important to distinguish between those species that are simply rare, those that are ‘Data Deficient’ and those that are genuinely threatened. It is also important to consider the ‘Extinct’ category very carefully as premature inclusion of a taxon in this category can preclude further searches for it. The IUCN Categories of Threat were found to be very workable for the African Odon. Problems are more to do with the practicalities of doing the field assessments, rather than with the categorisation itself. While the Red List is of enormous value when considering one species at a time, it should not be seen as a generalized data base amenable to comparative assemblage statistics, which are likely to reveal more on assessment efforts than on the organisms.

Andrew, R. J.
Egg chorionic ultrastructure of the dragonfly Tramea virginia (Rambur) (Anisoptera: Libellulidae)
p. 171-175.

SEM studies reveal that the egg chorion of T. virginia is divided into an outer soft exochorion and an inner tough endochorion. The exochorion expands into a jelly-like, sticky coat in water, while the endochorion is smooth, thin and unsculptured. The apically situated micropylar apparatus is formed of a large, dome-shaped, sperm-storage chamber and a small, flat, micropylar stalk which contains a pair of circular micropylar orifices. The micropylar apparatus is encircled by an exochorionic collar. The chorion is modified in accordance with the aquatic (still-water) mode of oviposition exhibited by this species while the micropylar apparatus is shaped to fit in the fertilization pore of the vagina.

Daigle, J. J.
Telebasis bickorum spec. nov. from Bolivia (Zygoptera: Coenagrionidae)
p. 177-180.

The new sp. is described from Bolivia (holotype male: Santa Cruz Dept., Ichilo Province, Buena Vista, February 2001; allotype female: same data as holotype). Holotype deposited in Universidad Autonoma “Gabriel Rene Moreno” (U.A.G.R.M.) in Santa Cruz, Bolivia; allotype deposited in the Florida State Collection of Arthropods in Gainesville, Florida, USA. Both sexes differ by the long and narrow black mesopleural suture on the thorax and acuminate male cerci which are longer than the paraprocts.

Gonzalez-Soriano, E.
Leptobasis melinogaster spec. nov., a new species from Mexico (Zygoptera: Coenagrionidae)
p. 181-185.

The new sp. is described, illustrated and compared with Leptobasis vacillans Hag. in Sel. and L. candelaria Alayo. A key to separate malemale of Mexican and Central American spp. of Leptobasis is provided.

Hartung, M.
Heteragrion palmichale spec. nov., a new damselfly from the Cordillera de la Costa, Venezuela (Zygoptera: Megapodagrionidae)
p. 187-191.

The new sp. is described from the Cordillera de la Costa in Venezuela. Holotype male: Venezuela, Edo. Carabobo, Bejuma, Cerro de Paja mountain, alt. ca 1200 m, 13-VI-1992; paratype male, same data; the holotype is to be deposited in MIZA, Maracay, Venezuela. No other specimens are known to date. This is one of the largest spp. within Heteragrion. The appendices are strongly arched in contrast to other members of the genus. Some similarities of appendices or size exist with H. tricellulare Calv., simulatum Wllmsn, peregrinum Wllmsn, and icterops Sel. The new sp. was found in an inhabited region of the Cordillera de la Costa, near Bejuma, Carabobo.

Legrand, J.
[Tragogomphus ellioti spec. nov., a new dragonfly from Aequatorial Africa (Anisoptera: Gomphidae).]
p. 193-197.

The new sp. is described and illustrated from a single male, collected in Gabon. Holotype male: Eastern Gabon, Makokou area, 1-XI-1976; deposited in MNHN, Paris. It lives in the upper sections of forest streams. The new sp. seems to be close to T. aurivillii Sjostedt, 1899, but it is very different from the sympatric T. tenaculatus (Fraser, 1926), known from this region.

Machado, A. B. M.
Neoneura lucas spec. nov. from Brazilian Pantanal (Zygoptera: Protoneuridae)
p. 199-204.

The new sp. is described and illustrated from 15 male and 2 female, collected in the Pantanal Region of Brazil. Holotype male, allotype female: Pocone, Rio Cuiaba, Mato Grosso, Feb. 1986; deposited in the author’s collection, Belo Horizonte. In view of the arrangement of the decumbent process of the dorsal branch of the superior appendage, the new sp. belongs to the fulvicollis-group R.W. GARRISON (1999, Odonatologica 28:343-375), differing from the other spp. of this group mainly by the presence of a small ventral hook on the apex of the upper branch of the superior appendage.

Tennessen, K. J.
Telebasis simulata spec. nov. from South America, previously confused with T. sanguinalis Calvert (Zygoptera: Coenagrionidae)
p.  205-210.

The new sp. (holotype male, allotype female: Brazil, State of Amazonas, Manaus, 20-VI-1922; deposited in FSCA, Gainesville, Fla, USA) is described and illustrated based on 82 male and 15 female from Brazil, Surinam, Trinidad and Venezuela. It most closely resembles T. sanguinalis but differs mainly by: (1) translucent dorsal flap of terminal penile segment rectangular in lateral view, gradually tapered to posterior lateral angle (vs flap with a posterolateral lobe-like extension directed posteriorly); (2) cerci 1.6 to 1.8 times as long as paraprocts (vs 2.0 times as long); (3) rear of head half black, black marking extending to occipital foramen (vs pale except for a pair of small, dark circular spots). T. sanguinalis is known only from central Bolivia and western Brazil.

Davies, D. A. L.
The odonate fauna of New Caledonia, including the descriptions of a new species and a new subspecies
p. 229-251.

An updated list is provided of the 55 spp. known to occur in New Caledonia, with some behavioural and distribution data, and with information on possible origin of the spp. which found and colonized the island. The new taxa described are: Adversaeschna brevistyla caledonica ssp. n. (holotype male: New Caledonia, Yate-Goro Rd, 22-II-1983), and Synthemis pamelae sp. n. (holotype male: New Caledonia, Mt Koghis, 9-V-1983). Also described are the previously unknown maleMetaphya elongata Campion and the previously unknown female Synthemis serendipita Winstanley. All type specimens are deposited at CUMZ, Cambridge, UK.

Hellmund, M.; Hellmund, W.
[Zygoptera egg-sets on dicotyledon leaves from the Middle Miocene of Salzhausen (Vogelsberg, Hesse, Germany).]
p. 253-272.

22 specimens of dicotyledon leaves with egg-sets of fossil Zygoptera, originating from a locality NE of Frankfurt/Main, Germany and preserved in SMF, Frankfurt/Main are described, illustrated and discussed. In the past (1846, H.R. Goeppert, Die Gattungen der fossilen Pflanzen, Henry and Cohen, Bonn), these structures were misinterpreted as saprophytes, “Hysterites opegraphoides”. The true nature of the sets is apparent from fossil and recent evidence; they are to be attributed to the “coenagrionid type” of oviposition, more particularly to the so-called “Zickzack- und Bogenmodus” mode sensu M. Hellmund and W. Hellmund, 1991 (Stuttg. Beitr. Naturk. (B) 177: 1-17). Herewith the phenomenon is recorded for the first time from the Middle Miocene and the Lower Neogene (age ca 15 mio yr), though this oviposition mode is practised since the Upper Cretaceous times (ca 90 mio yr ago) until present. In some Tertiary localities, e.g. Messel (Hesse) and Hammerunterwiesenthal (Saxony), egg-sets are the only evidence of the Zygoptera occurrence.

Novelo-Gutierrez, R.; Gomez-Anaya, J. A.; Arce-Perez, R.
Community structure of odonata larvae in two streams in Zimapan, Hidalgo, Mexico
p.  273-286.

Community structure of odon. larvae was investigated at El Saucillo (ES) and San Francisco (SF) streams, from August 1995 to July 1996. Species richness (S), species composition, Margalef’s richness index (R), Shannon-Wiener’s diversity index (H’), Hill’s evenness index (E), and rareness (Rs) were used to describe and compare the communities. Annual variation of the indices was examined within and among streams. Streams were significantly different in terms of physical/chemical variables, and faunistic similarity between the communities was quite low (37%). Mean larval density was highest at ES, but the remaining parameters were highest at SF. Global richness was 31 spp. and some spp. such as Hetaerina americana, Enallagma civile, Anax junius, Erpetogomphus elaps,Dythemis nigrescens, Aeshna multicolor, A. dugesi, Erythemis plebeja and the majority of Argia spp. were only found at SF. More abundant spp. at SF werePseudoleon superbus, Telebasis salva, Libellula saturata and Enallagma praevarum, while those more abundant at ES were Paltothemis lineatipes and Argia anceps.

Orr, A. G.
Notes on the Rhinocypha cucullata Selys group from Borneo, with a description of R. viola spec. nov. (Zygoptera: Chlorocyphidae)
p. 287-295.

The new sp. from the central Kalimantan province of Borneo is described and figured. The original type series of R. cucullata Selys was examined and a male specimen is designated as lectotype. The single female syntype is shown to in fact be R. humeralis Selys. The true female R. cucullata is described and figured for the first time. Significant characters of R. aurofulgens Laidl. are figured for comparative purposes. Keys are provided to both sexes of the three species, comprising the extended cucullata group of F.F. Laidlaw (1950, Trans. R. ent. Soc. Lond. 101: 233-269).

Beketov, M. A.
Ammonia toxicity to larvae of Erythromma najas (Hansemann), Lestes sponsa (Hansemann) and Sympetrum flaveolum (Linnaeus) (Zygoptera: Coenagrionidae, Lestidae; Anisoptera: Libellulidae)
p.  297-304.

Three different types of toxicological test were conducted, viz. the standard toxicological test at varying pH, a test with starved larvae and a test with different ionic composition of the water. For the larvae of L. sponsa, ammonia toxicity was examined only in the standard test at one pH value and in the test with varying ionic composition of the medium. Total ammonia was more toxic at elevated than at low pH to both S. flaveolum and E. najas larvae. In contrast, toxicity based on the un-ionized form appeared to increase with decrease in pH value. In general, larvae of all spp. have a high ammonia tolerance when compared to other aquatic animals. Tests with starved larvae showed that the ammonia tolerance of starved larvae of S. flaveolum was 3.7 times greater than that for the fed ones; for E. najas, this difference was only 1.2 times, explanations of this effect are discussed. Tests in varying ionic composition of the water illustrated that the absence of sodium ions accounts for a considerable increase in ammonia toxicity. It is interesting that a similar trend was found for fishes and crustaceans. Mechanistic explanations, which may differ from that for other groups, are proposed. Odon. larvae seem to be unsuitable for the bioindication of ammonia pollution.

De Marco, P.; Latini, A. O.; Ribeiro, P. H. E.
Behavioural ecology of Erythemis plebeja (Burmeister) at a small pond in southeastern Brazil (Anisoptera: Libellulidae)
p. 305-312.

An analysis of the time-budget and a description of reproductive behaviour at a small pond in Vicosa, Minas Gerais, Brazil are presented. The observations support the classification of this sp. as a percher. It also conforms to the predictions of other studies that large perchers are usually more aggressive toward conspecifics. E. plebeja male male were usually observed simulating oviposition in the areas they previously defended, and evolutionary aspects of this behaviour are discussed.

Machado, A. B. M.
Description of Lauromacromia flaviae spec. nov., with notes on the holotype of L. Luismoojeni (Santos) (Anisoptera: Corduliidae)
p. 313-318.

L. flavia sp. n. (male holotype: Jaboticatubas, Minas Gerais, Brasil, 14-I-1975; deposited in Author’s coll.), is described, illustrated, and compared with the other 2 congeners, all represented by males. Some amendments are made on the original description of L. luismoojeni, based on the examination of the holotype.

Theischinger, G.; Brown, G. R.
The larva of Huonia melvillensis Brown and Theischinger (Anisoptera: Libellulidae)
p. 319-322.

The larva of the sp. that is known only from Melville Island, off the northern coast of Australia, is described from 5 final instar exuviae from the type locality.

Hamalainen, M.
Notes on the Libellago damselflies of the Andaman and Nicobar Islands, with description of a new species (Zygoptera: Chlorocyphidae).
p. 345-358.

Libellago blanda (Hagen) and L. andamanensis (Fraser) are removed from synonymy with L. lineata (Burm.); they are redescribed in both sexes and compared with L. lineata. Recently acquired material from the Nicobar Isls (Camorta and Great Nicobar) reveals that the original type series of Micromerus blandusconsists of 2 close, but distinct spp. A male specimen (in ZMUC) from Nancowry Island is designated as the lectotype of blanda. Former syntype female from Little Nicobar belong to a new sp., described here as L. balus sp.n., holotype (deposited at RMNH, Leiden) of which comes from Great Nicobar Island, Campbell Bay area, 24-XII-2000. male of L. blanda and L. balus sp.n. differ in the colour pattern of abdomen and in the shape of rhinarium. The status of L. indica (Fraser) is briefly discussed.

Paulson, D. R.
Odonata records from Nayarit and Sinaloa, Mexico, with comments on natural history and biogeography.
p. 359-370.

Although the odon. fauna of the Mexican state of Nayarit has been considered well-known, a 7-day visit there in Sept. 2001 resulted in records of 21 spp. new for the state, bringing the state total to 120 spp., fifth highest in Mexico. Records from a 2-day visit in Aug. 1965 are also listed, many of them the first specific localities published for Nayarit, and the first records of 2 spp. from Sinaloa are also listed. The biology of most neotropical spp. is poorly known, so natural-history notes are included for many spp. A storm-induced aggregation and a large roost of dragonflies is described. The odon. fauna of Nayarit consists of 2 primary elements: a large number of neotropical spp. reaching their northern known limits, and a montane fauna of the drier Mexican Plateau. At least 57 spp. of tropical origin reach their northern distribution in the western Mexican lowlands in or N of Nayarit, and these limits must be more accurately defined to detect the changes in distribution that may be taking place with global climate change.

Samraoui, B. ; Weekers, P. H. H.; Dumont, H. J.
The Enallagma of the western and central Palaearctic (Zygoptera: Coenagrionidae).
p. 371-381.

Six populations of the Enallagma cyathigerum complex from North Africa, Europe and West and Central Asia were examined, mainly using DNA analysis and scanning electron microscopy. The taxa deserti and risi are geographic ssp. to E. cyathigerum: although males can unequivocally be identified from their superior anal appendages, their 18 S rDNA and intergenic spacers ITS 1 and 2 are identical. Moreover, morphological intermediates have become known between deserti and cyathigerum, and between risi and cyathigerum. The habitat choice (predatory fish tolerated but with difficulty) and salinity tolerance of all 3 are similar as well. It is concluded that they share a common origin, and only recently started to diverge.

Butler, S. G.
The larva of Macromia euterpe Laidlaw, 1915 (Anisoptera: Macromiidae).
p. 383-388.

An exuviae, associated with the named sp., is described, illustrated and compared with SE Asian congeners, M. moorei fumata Kruger and M. westwoodi Sel.

De Marmels, J.
Phylogenetic relationships of Priscagrion Zhou & Wilson, 2001, with a description of Teinopodagrion croizati spec. nov. from Ecuador (Zygoptera: Megapodagrionidae).
p. 389-394.

The generic characters of Priscagrion Zhou & Wilson, 2001 are reviewed. It is shown that this genus is closely related with the Australo-Papuan ‘Argiolestinae’ and with the South American ‘Megapodagrion-complex’. Hence, a Pacific origin for the whole group seems probable. Teinopodagrin croizati sp. n. (holotype male: Ecuador, Pichincha prov., 7.3 km W of Alluriquin, at Hotel Tinalandia, 20-VII-1977; deposited at MIZA, Maracay) is described and illustrated, and its position within the genus is outlined.

Garrison, R. W.; Costa, J. M.
The identity of Agrion? minutissimum Selys, 1876 and Leptobasis rosea Selys, 1877 (Zygoptera: Coenagrionidae).
p. 395-401.

Holotypes and allotypes of Calvertagrion dicellularis St Quentin, 1960 and Inpabasis eliasi Santos, 1961 were compared to holotypes of Agrion? minutissimumSelys, 1876 and Leptobasis rosea Selys, 1877, respectively. The first 2 names are considered junior synonyms of the older names. Diagnostic illustrations of all type material are provided.

Irineu De Souza, L. O.; Costa, J. M.; Espindola, L. A.
Description of the last instar larva of Oligoclada laetitia Ris, 1911 comparison with other Libellulidae (Anisoptera).
p. 403-407.

The morphology of the specimens from Pantanal Sul-Mato-Grossense, Brazil is illustrated, described and compared with other genera of Libellulidae possessing dorsal hooks on abdominal segments VIII-X.

von Ellenrieder, N.
Redescription of Linaeschna polli Martin, 1909 (Anisoptera: Aeshnidae: Gomphaeschninae).
p. 409-413.

The sp. is redescribed and illustrated, based on the male holotype deposited at the National Museum of Natural History, Leiden. Its position in the phylogenetic system of the aeshnids is discussed.