Revision of the genus Tanycypris (Ostracoda, Cypricercinae) with the description of Tanycypris alfonsi n. sp., and an identification key to the genus
Nagler, Christina
Geist, Juergen
Matzke-Karasz, Renate
Zootaxa
2014
2014-06-24
3821
4
401
424
8c3dca7b-8068-4e11-a8e8-63c2d683b639
(G. W. Muller, 1898)
G. W. Muller
1898
[151,754,1629,1655]
Ostracoda
Cyprididae
Tanycypris
GBIF
Animalia
Podocopida
10
411
Arthropoda
species
madagascarensis
( Figs 5E, 6E, 6J, 7B, 8) * v 1898 Cypris madagascarensisG. W. Müller: 271–273, pl. 16, 7–13. 1912 Dolerocypris madagascarensis—G.W. Müller: 193. v 1959 Tanycypris madagascarensis—Triebel: 167–169, pl. 16, 19a. pl. 17, 19b–21. pl. 18, 24–28.
Diagnosis.L = 1.42–1.66 mm, H = 0.57–0.66 mm; greatest width in the middle. Females 0.1 mmlonger than males on average. Carapace in dorsal view narrow. Valves asymmetric. RV smaller than LV, LV with an obtuse angle at the joining of the posterior and ventral margin ( Fig. 8A, B) Dorsal margin weakly arched; ventral margin slightly concave. A1 with Wouters organ and Rome organ and with extremely long setae on the fifth, sixth, seventh and eighth segment ( Fig. 5E). T1 with b and d seta, asymmetric in males ( Fig. 6J). T2 with very long and strong d, and thin, small d2. CR stoutly built, weakly bent; setules gradually decreasing in length from distal to proximal; Sp very long in relation to the Sp of other Tanycyprisspecies( Fig. 6E). Trunk of CR attachment as wide as trunk of CR; cone-like, short vb, slim, sinuous db ( Fig. 7B). Male hemipenis with a deep incisure in the lateral shield. Zenker organ with 30 rosettes of chitinous rays ( Müller 1898; Triebel 1959). History. Müller (1898)described Cypris madagascarensisfrom Majunga, Madagascar, and deposited the holotype[Cat II, No. 24626 (32a)] and several paratypesin the ZMG. Later, he transferred the species to Dolerocypris( Müller 1912). Triebel (1959), when erecting the genus Tanycypris, designated Tanycypris madagascarensisas type species. Similar species. Tanycypris madagascarensisis the largest species of the genus and has a characteristic posterior-ventral angle in the LV. It has a characteristic db on the CR attachment. The Sp on the CR is relatively long and all appendages are strongly built. The setae on all appendages are relatively long. This species cannot be mistaken for other species of the genus Tanycypris.