Klaus, Sebastian and Schubart, Christoph D. and Brandis, Dirk (2009) Ultrastructure of Spermatozoa and Spermatophores of Old World Freshwater Crabs (Brachyura: Potamoidea: Gecarcinucidae, Potamidae, and Potamonautidae). JOURNAL OF MORPHOLOGY, 270 (2). pp. 175-193. ISSN 0362-2525,
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We investigated the ultrastructure of spermatozoa and spermatophores of 19 palaeotropical freshwater crab species [12 species of the Gecarcinucidae, 6 of the Potamidae (Potamiscinae), and 1 species of the Potamonautidae (Deckeniinae: Hydrothelphusini)]. The investigated Potamiscinae have densely packed coenospermic spermatophores with the exception of Thaiphusa sirikit and Johora singaporensis that exhibit cleistospermia. In contrast, in the Gecarcinucidae the spermatozoa are loosely embedded in a mucous matrix. The gecarcinucid and potamiscine sperm differ, furthermore, in acrosomal structure and size. The acrosome in the Gecarcinucidae is much smaller and spherical, while the larger acrosome in the Potamiscinae has the tendency to be depressed. In the Potamiscinae, an additional middle acrosomal zone evolved between the acrosome ray zone and the outer acrosomal zone. Within the Gecarcinucidae, a differentiation into two groups (Gecarcinucinae and Parathelphusinae) is not supported by the present spermatological data. The sperm morphology of Hydrothelphusa aff. madagascariensis (Potamonautidae: Deckeniinae) differs from Potamonautes sidneyi (Potamonautidae: Potamonautinae) in acrosomal size and shape, and in the absence of a periopercular rim. A closer relationship of Deckeniinae and Gecarcinucidae cannot be confirmed by spermatology. J. Morphol. 270:175-193, 2009. (C) 2008 Wiley-Liss, Inc.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DECAPODA; CRUSTACEA; SPERM; BIOGEOGRAPHY; PODOTREMATA; PHYLOGENY; TAXONOMY; spermatozoa; spermatophores; freshwater crabs; Brachyura; Potamoidea |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Zoologie/Evolutionsbiologie (Prof. Dr. Jürgen Heinze) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Oct 2020 06:05 |
| Last Modified: | 07 Oct 2020 06:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29530 |
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