Ylistrum Mynhardt & Alejandrino, 2014
MYNHARDT, G., A. ALEJANDRINO, L. PUSLEDNIK, J. CORRALES & J. M. SERB. 2014. Shell shape convergence masks biological diversity in gliding scallops: description of Ylistrum n. gen. (Pectinidae) from the Indo-Pacific Ocean. Journal of Molluscan Studies, 80 (4): 400-411, figs. 1-5. [p. 407]
«Ylistrum Mynhardt & Alejandrino, new genus
Type species: Pecten balloti Bernardi, 1861.
ZooBank registration: urn: lsid:zoobank.org: pub: 69A92AE8-97C1-4D6D-9DBE-294D18304F23.
Etymology: Ylistrum comes from the Greek verb γλιστρό (ylistro), to glide, describing the gliding life habit of this genus. We use the neuter latinized form as the generic name.
Material Examined: MNHN 21185 (New Caledonia); USNM 1236641 (Queensland, Australia); WAM 33076–33088 (Western Australia, Australia); USNM 23947, USNM 229068–229070, USNM 304217, USNM 343967, USNM 753705, USNM 763645, USNM 8181253, USNM 1236649, DMNH 13078, DMNH 20698, DMNH 42249, DMNH 111140, DMNH 155970 (Japan); USNM 333959, DMNH 155970 (China) (Supplementary Material, Appendices SB and SC).
Description: Size large, maximum height up to 120 mm. Shell shape disc-like, thin, externally smooth, suborbicular to orbicular, umbonal angle c. 1208; valves very slightly convex, compressed near umbo, gaping at anterior and posterior sides; auricles small, equal in size. Left valve variable in color from light to dark red-brown, occasionally with irregular light or dark speckling, radial lines present or absent; right valve slightly smaller than left, white, sometimes with brown or yellow ventral margins (Fig. 1D–L); internal ribbing on both valves; left valve with 30–41 ribs, right valve with 36–51 ribs.
Distribution: Subtropical and temperate Indo-Pacific Ocean.»
GLENÉ MYNHARDT, & ALVIN ALEJANDRINO, 2014
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G. Mynhardt, A. Alejandrino, L. Puslednik, J. Corrales & J. M. Serb, 2014, Shell shape convergence masks biological diversity in gliding scallops: description of Ylistrum n. gen. (Pectinidae) from the Indo-Pacific Ocean, figures 1D-1F (Ylistrum japonicum); figures 1G-1L (Y. balloti).
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