Lamellidens Simpson, 1900

Bolotov, Ivan N., Sonowal, Jyotish, Kardong, Devid, Pasupuleti, Rajeev, Subba Rao, Nalluri V., Unnikrishnan, Suresh Kumar, Gofarov, Mikhail Y., Kondakov, Alexander V., Konopleva, Ekaterina S., Lyubas, Artem A. & Vikhrev, Ilya V., 2024, Discovery of an endemism hotspot of freshwater mussels (Bivalvia: Unionidae) in Assam, with a description of two new genera, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 202 (4), pp. 1-19 : 13

Genus Lamellidens Simpson, 1900

(type species: Unio marginalis Lamarck, 1819 ; by original designation) ( Simpson 1900).

( Figs 4B–G , 5A–G )

Comments: This genus contains 13 recent species ( Bolotov et al. 2022a, b). Two widespread and one putative local species were recorded from Assam ( Table 1 ).

Figures

Figure 4. Shells of Lamellidentini species from Assam (sequenced specimens; outer view of the left valve and inner view of the right valve).A, Balwantia soleniformis (Benson, 1836), sample DLS-DU BS-BDH-1. B–G, Lamellidens jenkinsianus (Benson, 1862): topotypes LJ-NKM-2 (B), LJ-NKM-3 (C), L5-NKM-1 (D), L4-NKM-1 (E), L5-NKM-4 (F), and L4-NKM-2 (G). Scale bars = 10 mm. The shell vouchers of the new samples are deposited in FBRC ZSI and DLS-DU (Supporting Information, Dataset S1). Photos:J.Sonowal and D. Kardong.

Figure 5. Shells of Lamellidens nongyangensis Preston, 1912 (Lamellidentini) (outer view of the left valve and inner view of the right valve). A, holotype ZSI 5068/1 with its label, Lake of No Return (=Nongyang Lake), 27.2192°N, 96.1439°E, Irrawaddy Basin, Myanmar. B–G, sequenced specimens from Assam: samples L1-TLM-3 (B), L2-TLM-2 (C), LL-TNG-4 (D), LN-TNG-3 (E), LU-DHN-2 (F), and LJ-TLM-1 (G). Scale bars = 10 mm. The shell vouchers of the new samples are deposited in FBRC ZSI (Supporting Information, Dataset S1). Photos: N.V.Subba Rao and R. Pasupuleti (A); J. Sonowal and D. Kardong (B–G).