Tanycypris centa ( Chang et al., 2012 )

Nagler, Christina, Geist, Juergen & Matzke-Karasz, Renate, 2014, Revision of the genus Tanycypris (Ostracoda, Cypricercinae) with the description of Tanycypris alfonsi n. sp., and an identification key to the genus, Zootaxa 3821 (4), pp. 401-424 : 410

Tanycypris centa ( Chang et al., 2012)

( Figs 5A , 6D, 6I , 7C )

Diagnosis. L = 1.10–1.14 mm, H = 0.45–0.47 mm; maximum height at the anterior quarter. Carapace in dorsal view narrow, in lateral view elongated. Inner lamella broad with slight concavity in postero-ventral region. Carapace with large purple patches. A1 with Wouters and Rome organ ( Fig. 5A ). T1 elongated with two a-setae, with b-seta and with d-seta. Masticatory process of T1 with 12 setae ( Fig. 6I ). T2 with longer d1 than d2. CR relatively long, almost straight, Sp plumose ( Fig. 6D ). CR attachment stout, relatively short and slim, with db strongly bent, vb thin and curved ( Fig. 7C ). Males unknown ( Chang et al. 2012).

Similar species. Tanycypris centa can be mistaken for Tanycypris siamensis , Tanycypris alfonsi n. sp. and Tanycypris pellucida . T. centa possesses a straighter dorsal margin and a narrower curved posterior margin than T. siamensis (subequally curved in the latter) and a differently shaped inner margin. The CR is thinner than in T. siamensis . The carapace is set with purple patches in T. centa , while T. siamensis is consistently brownish-yellow ( Chang et al. 2012).

T. centa differs from T. pellucida in the lack of a second b-seta on T1 ( T. pellucida : T1 with two b-setae), a much wider calcified inner lamella in T. centa and in the lack of a dorsal subapical seta on the first segment of A1 (present in T. pellucida ). T. centa differs from T. alfonsi n. sp. in the carapace coloration ( T. alfonsi n. sp. is light green), in the lack of a roof tile-like structure in the anterior region of the carapace (present in T. alfonsi n. sp.), in a more ovoid shape in dorsal view (narrower in T. alfonsi n. sp.) and in the lack of a long dorsal subapical seta on the first segment of A1 (present in T. alfonsi n.sp.).

Remarks. Chang et al. (2012) described Tanycypris centa from Korea and deposited the material in the National Institute of Biological Resources, Incheon, Korea (No. NIBRIV 0000243259–0000243262) and in the Department of Biological Science, Daegu University, Korea (No. DB 40011–40028). For the present study, specimens sampled in the Botanical Garden Munich have been investigated.

Figures

FIGURE 5. First antennae. A, Tanycypris centa (after Chang et al. 2012); B, T. pellucida; C, T. siamensis (after Savatenalinton & Martens 2009a); D, N. obtusa; E, T. madagascarensis. Scale bar = 100 µm for A–E.

FIGURE 6. Caudal rami and first thoracopod. A, CR Nealecypris obtusa; B, CR Tanycypris pellucida; C, CR T. siamensis (after Savatenalinton & Martens 2009a); D, CR T. centa; E, CR T. madagascarensis; F, T1 (female) N. obtusa; G, T1 (female) T. pellucida; H, T1 (female) T. siamensis (after Savatenalinton & Martens 2009a); I, T1 (female) T. centa (after Chang et al. 2012); J, T1 (male) T. madagascarensis. Scale bar = 100 µm for A–J.

FIGURE 7. Caudal ramus attachments. A, Nealecypris obtusa; B, Tanycypris madagascarensis; C, T. centa; D, T. pellucida; E, T. siamensis (after Savatenalinton & Martens 2009a). Scale bar = 100 µm for A–E.