Baseodiscus paracelensis, Kajihara & Abukawa & Chernyshev, 2022

Kajihara, Hiroshi, Abukawa, Shushi & Chernyshev, Alexei V., 2022, Exploring the basal topology of the heteronemertean tree of life: establishment of a new family, along with turbotaxonomy of Valenciniidae (Nemertea: Pilidiophora: Heteronemertea), Zoological Journal of the Linnean Society 196, pp. 503-548 : 526

BASEODISCUS PARACELENSIS SP. NOV.

( FIGS 2J , 7B )

Zoobank registration: u r n: l s i d: z o o b a n k. org:act: 33BCC3BA-792C-443E-A579-27E06A9E8A5B.

Material examined: Holotype, MIMB 33132 (morphological voucher), ICHUM 6311 (DNA voucher), 26 January 2005, subtidal, among dead coral, 69 m depth, off the Paracel Islands (16°07′36″N, 114°47′36″E), South China Sea, collected by A. V. Chernyshev during an expedition on S/ V Academic Oparin.

Figures

Figure 2. A, Eopilidion misakiense gen. et sp. nov., holotype, ICHUM 6303, lateral view, head to the right; B, Oxypolella hiebertae sp. nov., holotype, MIMB 42256; C, Cephalomastax brevis Iwata, 1957, ICHUM 6304; D, E, Valencinura jambio sp. nov., holotype, ICHUM 6305, anterior body fragment (D) and enlargement of intestinal region (E) showing yellowish proboscis (indicated by arrowheads); F, Baseodiscus takakurai Gibson, 1995, ICHUM 6306; G, Baseodiscus profundus sp. nov., holotype, MIMB 42257; H, I, Baseodiscus narusei sp. nov., holotype, ICHUM 6310, anterior end of body, dorsal (H) and ventral (I) views; J, Baseodiscus paracelensis sp. nov., holotype, MIMB 33132; K, Baseodiscus komatsui sp. nov., holotype, NMNS-Ne 1; L, Baseodiscus unicolor Stiasny-Wijnhoff, 1925; M, Baseodiscus giribeti sp. nov., holotype, MCZ IZ-135324; N, Baseodiscus cf. amboinensis (Staub, 1900); O, Baseodiscus hemprichii (Ehrenberg, 1828-1831), specimen from Okinawa, different from any voucher specimens in this study; P, Baseodiscus zebra sp. nov., holotype, RUMF-ZN-00001; Q, Baseodiscus quinquelineatus (Quoy & Gaimard, 1833), ICHUM 6319. Photographs by H. Kajihara (A, C, D, E, F, O), A.V. Chernyshev (B, G, J), T. Naruse (H, I), H. Komatsu (K), G. Giribet (L, M), D. Uyeno (P), and R.Yoshida (Q).

Figure 7. A, Baseodiscus narusei sp. nov., holotype, ICHUM 6310, entire body, showing characteristic lateral edges; B, Baseodiscus paracelensis sp. nov., holotype, MIMB 33132, entire body; C, Baseodiscus aff.marmoratus (Bürger, 1890), anterior end of body, ventral view, head to the left; D, E, Baseodiscus ohtsukai sp. nov., holotype, ICHUM, 6327, drawings of anterior end of body viewed dorsally (D) and ventrally (E); F, G, Baseodiscus urgorrii sp. nov., holotype, MCZ IZ-135319, anterior end of body viewed dorsally (F) and ventrolaterally (G). Photos by T. Naruse (A), A. V. Chernyshev (B, C), and G. Giribet (F, G).