Scabies mandarinus (Morelet, 1864)

Ng, Ting Hui, Jeratthitikul, Ekgachai, Sutcharit, Chirasak, Chhuoy, Samol, Pin, Kakada, Pholyotha, Arthit, Siriwut, Warut, Srisonchai, Ruttapon, Hogan, Zeb S. & Ngor, Peng Bun, 2020, Annotated checklist of freshwater molluscs from the largest freshwater lake in Southeast Asia, ZooKeys 958, pp. 107-141 : 107

Scabies mandarinus (Morelet, 1864) Fig. 3K

Unio mandarinus Morelet, 1864: 159. Type locality: “Cochinchina”.

Scabies crispata : Brandt 1974: 281-282, pl. 20, fig. 33.

Scabies mandarinus : Pfeiffer et al. 2018: 403-413.

Material examined.

CIFI.MOL.001, CIFI.MOL.002, CIFI.MOL.003, CIFI.MOL.004, CIFI.MOL.004, CIFI.MOL.005, CIFI.MOL.006, MUMNH.UNI.2620, MUMNH.UNI.2632, MUMNH.UNI.2638, MUMNH.UNI.2640, MUMNH.UNI.2643, MUMNH.UNI.2647, MUMNH.UNI.2654, MUMNH.UNI.2663, MUMNH.UNI.2664, MUMNH.UNI.2672, ZRC.MOL.015655, ZRC.MOL.015656.

Distribution and habitat.

Tonle Sap Lake open area in Banteay Meanchey and Siem Reap Provinces, Tonle Sap River in Siem Reap Province and Chhnok Tru landing point, Sangkae River in Battambang Province, Pursat River in Pursat Province, Tang Krasang River in Kampong Thom Province, Sreng River in Siem Reap Province (locality no. 2, 3, 7, 8, 12, 24, 27, 30, 32, 36 and 38); in soft muddy and sandy substrate.

Remarks.

Scabies mandarinus was described by Morelet in 1864, based on specimens collected from “Cochinchina”. This name was previously placed as a junior synonym under Scabies scobinatus (Lea, 1856) and Scabies crispata (Gould, 1843) (e.g., Haas 1969; Brandt 1974). Based on molecular phylogeny data, Pfeiffer et al. (2018) revealed a distinct clade of Parreysiinae from Mekong delta and eastern gulf of Thailand and resurrected the name Scabies mandarinus for this clade. Jeratthitikul et al. (2019a) later included Scabies populations from the Tonle Sap basin into this species, based on molecular data and shell morphology.

Figures

Figure 3. Freshwater bivalves of the Tonle Sap basin, Cambodia (Pharidae and Unionidae) A Novaculina siamensis B Bineurus mouhotii C Contradens contradens D Ensidens ingallsianus E Hyriopsis bialata F Hyriopsis delaportei G Monodontina cambodjensis H Physunio micropterus I Pilsbryoconcha linguaeformis J Pilsbryoconcha lemeslei and K Scabies mandarinus. Scale bars: 10 mm, unless stated otherwise. Photographs by K Macharoenboon.