ODONATOLOGICA
Volume 32, Issue 3
2003
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ODONATOLOGICA |
| Contents Volume 32, Issue 3 2003 |
| Cordoba-Aguilar, A. A description of male and female genitalia and a reconstruction of copulatory and fertilisation events in Calopteryx haemorrhoidalis (Vander Linden) (Odonata: Calopterygidae). p. 205-214. The genitalia have a "design" remarkably similar to those of other representatives of the family. The main female structures are the bursa copulatrix, a T-shaped spermatheca, a pair of vaginal plates bearing a variable number of mechanoreceptive sensilla, and a ganglion located at the VIII abdominal segment. The male introminent organ is a curved, sclerotised aedeagus that ends in a distal penis head. This latter structure bears 2 lateral appendages which are covered by recurved spines. A construction of the fertilisation and copulatory events is proposed based on descriptive and experimental evidence in other zygopterans as well as in this species. The female genital anatomy suggests fertilisation occurs in the manner proposed for other odonates. Experimental evidence shown in this work suggests that, during fertilisation, the egg stimulates the mechanoreceptive sensilla and elicits contractile activity of the muscles that surround the sperm storage organs (SSOs). The contractile activity is likely to be mediated by the VIII abdominal segment ganglion. As a consequence of the muscular contractions, the SSOs eject sperm which arrive to the site where the egg is and fertilise it. During copulation, the aedeagus "imitates" the presence of an egg in the vaginal plates and stimulates the mechanoreceptive sensilla inducing spermathecal sperm ejection. It is likely that spermathecal sperm is ejected to the bursa copulatrix where it is removed by the penis head and lateral appendages. After this sperm displacement process, the copulating male's sperm, stored in the seminal vesicle, is transferred, through a canal-like passage, by the aedeagus to the SSOs. Since femalefemale exhibit a considerable intra- and inter-individual variation in sensillum distribution and number on the plates, it is discussed whether this may have an adaptive significance in terms of retaining more control over stored sperm for female during male stimulation. |
| Kalkman, V. J.;
Wasscher, M.; Van Pelt, G. J. An annotated checklist of the Odonata of Turkey. p. 215-236. In addition to the checklist, spp. of which the taxonomic status has changed, or with significant changes in the known distribution, are annotated. At present a total of 96 spp. (6 of which are divisible into 2 or more sspp.) are now known to occur in Turkey with certainty, and at least 15 spp. and an additional 5 sspp. are to be expected. Ischnura fountaineae is new to the Turkish fauna. The sole Turkish record of Ophiogomphus cecilia pertains to O. reductus which is here mentioned for the first time from Turkish territory. |
| Wilson, K. D. P.;
Reels, G. T. Odonata of Guangxi Zhuang Autonomous Region, China, part I: Zygoptera. p. 237-279. Taxonomic and faunistic information is provided on the Zygoptera of Guangxi Zhuang Autonomous Region, China. Megalestes haui sp. n. (holotype: male, Shiwandashan), M. tuska sp. n. (holotype: male, Dayaoshan), Rhipidolestes laui sp. n. (holotype: male, Cenwanglaoshan), Calicnemia haksik sp. n. (holotype: male, Cenwanglaoshan), Coeliccia galbina sp. n. (holotype: male, Longrui) and Drepanosticta magna sp. n. (holotype: male, Cenwanglaoshan) are described. Sinolestes truncata Needham is synonymised with Sinolestes edita Needham. The hitherto unknown male of Indocypha katharina (Needham) and female of Schmiditiphaeo vietnamensis (van Tol & Rozendaal) are described. Devadatta ducatrix Lieftinck. Euphaea guerini Rambur. Euphaea superba Selys. Schmidtiphaea vietnamensis van Tol & Rozendaal, Indocnemis ambigua (Asahina), Calicnemia miles (Laidlaw), and an undescribed species of Drepanosticta are recorded from China for the first time. The status of Guangxi as an important centre of odonate biodiversity is discussed. |
| Lajeunesse, M. J.
; Forbes, M. R. A comparison of structural size and condition in two female morphs of the damselfly Nehalennia irene (Hagen) (Zygoptera: Coenagrionidae). p. 281-287. Female colour polymorphism in coenagrionid damselflies is genetically determined for the 4 spp. so far studied. No size differences between female morphs have been reported. In another sp., size differences between morphs do exist but the genetic basis of the polymorphism has not been explored. In N. irene, 2 female morphs exist: one is similar to the male in both colour and pattern (the androchrome), whereas the other differs from the male (the more common gynochrome). No differences are shown in lengths of wing, femur or tarsus between androchromes and gynochromes, nor any differences in multivariate estimates of size or in wet mass corrected for these size estimates were found. The study controls for time of season, which is known to influence the size of emerging temperate damselflies. The results concur with results from other spp. where the genetic basis of colour polymorphism is known. |
| Novelo-Gutierrez,
R.; Gonzalez-Soriano, E. The larva of Lestes alfonsoi Gonzalez & Novelo (Zygoptera: Lestidae). p. 289-294. Detailed description and illustrations are provided. A comparison with other Mexican larvae of the genus and a key to separate species are also included. Larva of L. alfonsoi seems not to be related to any of the known larvae of the genus, although it shares more features in common with the larva of L. alacer. |
| Vick G.S. David Allen Lewis Davies. p. 295-301. |
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