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An adjusted concept for a problematic taxon, Paramysis festae Colosi, 1921, with notes on morphology, biomineralogy, and biogeography of the genus Paramysis Czerniavsky, 1882 (Mysida, Mysidae)
Wittmann, K.J.; Ariani, A.P. (2011). An adjusted concept for a problematic taxon, Paramysis festae Colosi, 1921, with notes on morphology, biomineralogy, and biogeography of the genus Paramysis Czerniavsky, 1882 (Mysida, Mysidae). Crustaceana 84(7): 849-868. http://dx.doi.org/10.1163/001121611X574272
In: Crustaceana. Brill Academic Publishers: Leiden; Köln; New York; Boston. ISSN 0011-216X; e-ISSN 1568-5403
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| Trefwoorden |
Classification > Taxonomy
Geography > Biogeography
Morphology
Paramysis Czerniavsky, 1882 [WoRMS]; Paramysis festae Colosi, 1921 [WoRMS]
Marien/Kust |
| Author keywords |
Paramysis festae; biomineralogy |
| Auteurs | | Top |
- Wittmann, K.J.
- Ariani, A.P.
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| Abstract |
The type series of Paramysis festae Colosi, 1921, contained material from two different genera. Nonetheless the specific status of P. festae is confirmed, based on a revised set of characters. Its acknowledged distribution is restricted again to the type locality, a brackish lagoon on the coast of Libya. First records are given for P. bacescoi Labat, 1953, in the Mediterranean (Levantine Sea), and for P. helleri (G. O. Sars, 1877) and P. agigensis Baacescu, 1940, in the Sea of Marmora. New records support the previously not acknowledged occurrence of P. helleri in the Black Sea. Not counting the doubtful taxa P. proconnesia Colosi, 1922, and P. portzicensis Nouvel, 1950, a total of ten species of the genus Paramysis Czerniavsky, 1882, is definitively acknowledged for the NE-Atlantic, Mediterranean, and Marmora basins. A key to these ten species is given. Among 15 species of the genus Paramysis examined, 14 have statoliths mineralized with vaterite (CaCO3); only P. arenosa (G. O. Sars, 1877) has fluorite (CaF2). Among the vaterite-bearing species, a Ponto-MediterraneanAtlantic group with seven species is marked by thoracic sternites with smooth median processes, clearly different from sternites with hair-like or spine-like scales in six Ponto-Caspian and one Anatolian species. Together with published data on the fossil record and genetics, the new findings on the distribution, morphology, and statolith composition in Ponto-Mediterranean and Pontic species of Paramysis fit well to scenarios of remote Paratethyan origin, possible divergence of taxa in the Messinian Mediterranean, and later return of some descendants to the Black Sea. |
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