Rectidens lauris Zieritz, sp. nov.

Rectidens lauris Zieritz et al., sp. nov. (Fig. 4) Type locality: Sungai Rempangi (Pawan Drainage), 17 km SSW of Randau, Ketapang Regency, West Kalimantan, Indonesia. Type: Holotype, FKH_MFw_x533. Paratype, FKH_MFw_ x519, Sungai Melayu [Pawan Drainage], 18.7km SSW of Randau, Ketapang Regency, West Kalimantan, Indonesia. Material examined: Two lots: FKH_MFw_x533, FKH_MFw_x519. Diagnosis: Morphologically very similar to Rectidens sumatrensis. Description: Shell thin, elongate shell outline; dorsal margin slightly rounded; ventral margin straight; posterior slope slightly biangulate; umbo even with hinge line; periostracum, yellowish/ greenish brown. Psedocardinal teeth, long, thick, one tooth in less valve* two teeth in right valve. Lateral teeth long* curved* two in less valve* one in right valve; Nacre white* with peach tint near the umbo. Soss anatomy unavailable for study. Distribution: Known from only two localities in the Pawan drainage in West Kalimantan % Fig. 5). Etymology: Ŋe species is named asser the river catchment of its type locality* i.e. the Laur River basin* and the ethnic group indigenous to this area* i.e. ‘Dayak Laur’.