ODONATOLOGICA Journal of the Societas Internationalis Odonatologica

Contents Volume 31, Issue 4 2002

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 blandus consists 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? minutissimum Selys, 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.

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