MUSSELpdb | valid sp. Lens comptus specimens

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Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

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species Lens comptus (Deshayes in Deshayes & Jullien, 1876): specimens
2 available nominal species synonyms (3 total synonyms)

Recent Taxonomic Opinions

Harmandia munensis — Graf & Cummings (2007), Bogan (2010), IUCN (2012), Zieritz et al. (2018)
Trapezoideus exolescens — He & Zhuang (2013)
Contradens sp. 6 — Bolotov et al. (2017)
Contradens sp. “Nam Long” — Bolotov et al. (2017)
Trapezoideus comptus — Pfeiffer et al. (2018)
Contradens sp. ‘Nam long’ — Bolotov et al. (2018)
Contradens comptus — Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Contradens sp. 'Nam Long' — Huang et al. (2019)
Lens comptus — Pfeiffer et al. (2021), Bolotov et al. (2022), Konopleva et al. (2023), Dai et al. (2023), Zieritz et al. (2024), Dai et al. (2024), Dai et al. (2025)

Range

Mekong River, Cambodia, Laos, and Thailand.

Map of Georeferenced Specimens

species map

NCSM_85232 Asia, Mekong Basin/Ngum R. Laos, Xiangkhoang, Nam Ngum at end of logging road southwards from Ban Xiangdet [approx. 3.61 air miles SSE], [2.22 air miles NNW center Bounglouang], 19.38167° N, 102.7389° E	MNHN_MP_3356 Cochinchine	MNHN_MP_3366 Cochinchine
UMMZ_110864 Cochinchine	UMMZ_110869 Southeastern Asia

Cambodia

UMMZ_23070 Cambogia	MNHN_MP_3348 Mekong River at Stung Treng, Cambodia	UF_507417 Mekong River, 1.4 miles upstream from Sambour. CA16-08. 12.79459, 105.97255
UF_507403 Mekong River, 5.17 miles upstream of Mekong and Sekong Confluence. CA16-05. 13.59515, 106.01447	UF_507423 Mekong River, 700 ft downstream of Sandan. CA16-09. 12.68691, 106.01697	UF_507429 Mekong River, upstream of fishing village near the confluence of Tonle Sap River. CA16-10. 11.57207, 104.94050
MNHN-IM-2000-1661 Peam Chelang, Cambodge	MNHN-IM-2000-1661 Peam Chelang, Cambodge	MNHN_MP_3595 Srepock, Cambodge, a l’est de Stung Treng
UF_507396 Tonle Kong River just upstream of island, 8.3 miles NE of AH11 bridge near Stung Treng. CA16-04. 13.60938 ,106.09245	UF_507390 Tonle Sekong River, 1.6 miles upstream from AH11 Bridge. CA16-03. 13.54504, 106.01353	UF_507386 Tonle Srepok River, bridge just north of Phumi Srê Ta Chan, Cambodia. CA16-02. 13.50248, 106.35194
UF_507380 Tonle Srepok River, major bridge crossing on road from Stung Treng to Ban Lung. Srae Angkrorng, Ratanakiri, Cambodia. CA16-01. 13.44339, 106.60329

Laos

NCSM_85228 Asia, Mekong Basin/Ngum R. Laos, Vientiane, Nam San, rapids near km mark 54 on from Thatbok to Phubia mine, about [8.7 air] km S [center] of Xieng Mi, 10[air] km N [center] of Ban Longxan, 18.595° N, 103.0781° E	NCSM_83060 Asia, Mekong Basin/Ou R./Long R. Laos, Phôngsali, Nam Long, at confluence with Nam Ou, about [6] km upstream of Ban Hatxa [Ban Hatxông], [2.6 air km N center Phông Sali]. 21.76778° N, 102.1958° E	MNHN_MP_3350 Huai Kai, near Pakse, Laos
SMF_205127 Laos;:Mekopng branch at Ban Done Det, S of Khong	SMF_319484 Laos: Huai Kei bei Pakse	SMF_319382 Laos: Mekong at Cham Pasak
SMF_205137 Laos: Mekong Branch at Ban Done Det, S of Khong	UMMZ_248794 Laos: Mekong River at Khong, South Laos	MNHN_MP_3354 Laos: Mekong River at Muang Khong
SMF_205126 Laos: Sedone River at Ban Hua Daeng, 9 km N of Pakse	SMF_239260 Laos: Xedone River at Ban Hua Daeug, 8 km N of Pakse	USNM_786269 Laos: Xedone River, at Ban Hua Daeng, 9 km N Pakse
MNHN_MP_2875 Luang Prabang	MNHN_MP_3357 Luang Prabang	USNM_786265 Mekong at Ban Done Det, Laos
SMRL_16888 Mekong branch at Ban Don Det	SMF_319383 Mekong Khong Island Laos	SMF_319410 Mekong River at Khone Prov. Sithandone
MNHN_MP_3361 Minam Feau Massie, Laos	MNHN_MP_3347 Nam - Ou, Laos	MNHN_MP_PARIS2 Nam - Ou, Laos
UMMZ_110873 Nam - Ou, Laos, Indo China	MNHN_MP_3749 Nam Co A Muong Sai, Haut Laos	UA_20998 Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos
UA_20999 Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos	UMMZ_304347 Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos (22°4’40” N, 101°46’ 0” E)	SMF_13700 Nam Ou, Laos
MNHN_MP_3690 Nam Pak, Nam Co, Nam Lan, Haut Laos	MNHN_MP_3346 Riv. Menam, Laos Occidental

Thailand

MNHN_MP_3351 de la riviere Salabury, Siam	MNHN_MP_3364 de la riviere Salabury, Siam	UF_507827 Mekong River at Ban Hin Khan on Rt. 2034. TH16-46. 16.134, 105.032
UF_507795 Mekong River at Ban Huai Sueam Nuea on Rt. 212. TH16-36. 18.416, 103.546	UF_507792 Mekong River at Ban Tha Pho on Rt. 212. TH16-35. 18.339, 103.721	UF_507833 Mekong River at Muk River mouth in Mukdahan. TH16-48. 16.546135, 104.731717
UF_507751 Mekong River at Nong Khai. TH16-26. 17.882, 102.735	SMF_13702 Salabury, Siam	MNHN_MP_3352 Siam
SMF_220828 Thailand: Mun River at Phibun Mangsahan	ANSP_339099 Thailand: Ubon Prov., Khemmarat Amphoe Mekong River	UF_507758 Trib. of Mekong River at Rt. 211 bridge approx. 3 km S of Ban Muang. TH16-28. 18.151, 102.179

Vietnam

NCSM_84934
Asia, Hong Basin (Red Basin)/Đà R. (Black R./Lixian R.-China)/Lûm R. Vietnam, Mien nui va trung du (Northeastern), Lai Chau Co. [Nâm Lûm/Lûm River]. Phong Tho, Phong Tho district, [1.23 air miles E center Phong Tho]. 22.54264° N, 103.3117° E

NCSM_84935
Asia, Mā Basin /Lu R./Lúa R. Vietnam, Tây Bắc (Northwest), Dien Bien Co. Nam Lúa, near Núa Ngam, [0.33 air miles E center Hát He]. 21.26553° N, 103.0472° E

MNHN_MP_3353
Tonkin...

Georeferenced Genbank Vouchers

Cambodia

UF_507417 (ICH-00547). (COI: MT905675, go to Genbank) Cambodia, Mekong River, 1.4 miles upstream from Sambour (12.794587, 105.972551).

UF_507417 (ICH-00554). (COI: MT905678, go to Genbank) ditto.

UF_507417 (ICH-00555). (COI: MT905679, go to Genbank) ditto.

UF_507417 (ICH-00556). (COI: MT905680, go to Genbank) ditto.

UF_507417 (ICH-00557). (COI: MT905681, go to Genbank) ditto.

UF_507403 (ICH-00503). (COI: MT905654, go to Genbank) Cambodia, Mekong River, 5.17 miles upstream of Mekong and Sekong Confluence (13.595154, 106.014469).

UF_507403 (ICH-00504). (COI: MT905655, go to Genbank) ditto.

UF_507403 (ICH-00505). (COI: MT905656, go to Genbank) ditto.

UF_507403 (ICH-00506). (COI: MT905657, go to Genbank) ditto.

UF_507403 (ICH-00507). (COI: MT905658, go to Genbank) ditto.

UF_507396 (ICH-00469). (COI: MT905641, go to Genbank) Cambodia, Tonle Kong River just upstream of island, 8.3 miles NE of AH11 bridge near Stung Treng (13.609383, 106.092445).

UF_507396 (ICH-00470). (COI: MT905642, go to Genbank) ditto.

UF_507396 (ICH-00471). (16S: MH346013, 28S: MH345993, COI: MH345973, go to Genbank) ditto.

UF_507396 (ICH-00472). (COI: MT905643, go to Genbank) ditto.

UF_507396 (ICH-00473). (COI: MT905644, go to Genbank) ditto.

UF_507396 (ICH-00474). (16S: MH346014, 28S: MH345994, COI: MH345974, go to Genbank) ditto.

UF_507390 (ICH-00451). (COI: MT905633, go to Genbank) Cambodia, Tonle Sekong River, 1.6 miles upstream from AH11 Bridge (13.545038, 106.013527).

UF_507380 (ICH-00407). (COI: MT905608, go to Genbank) Cambodia, Tonle Srepok River, major bridge crossing on road from Stung Treng to Ban Lung (13.443388, 106.603294).

UF_507380 (ICH-00408). (COI: MT905609, go to Genbank) ditto.

UF_507380 (ICH-00409). (COI: MT905610, go to Genbank) ditto.

UF_507380 (ICH-00410). (COI: MT905611, go to Genbank) ditto.

UF_507380 (ICH-00411). (COI: MT905612, go to Genbank) ditto.

UF_507382 (ICH-00418). (COI: MT905616, go to Genbank) ditto.

UF_507423 (ICH-00562). (COI: MT905683, go to Genbank) Thailand, Mekong River, 700 ft downstream of Sandan (12.68691, 106.016966).

UF_507423 (ICH-00563_AHE). (COI: MT905685, go to Genbank) ditto.

UF_507423 (ICH-00563). (COI: MT905684, SRA: SRX8934355, go to Genbank) ditto.

UF_507429 (ICH-00576). (16S: MH346015, 28S: MH345995, COI: MH345975, go to Genbank) Thailand, Mekong River, upstream of fishing village near the confluence of Tonle Sap River (11.572071, 104.940501).

UF_507429 (ICH-00577). (16S: MH346016, 28S: MH345996, COI: MH345976, go to Genbank) ditto.

UF_507429 (ICH-00578). (COI: MT905692, go to Genbank) ditto.

Laos

RMBH_biv_182_10. (28S: KX865803, COI: KX865932, go to Genbank) Laos: Mekong River basin, Nam Long River.

RMBH_biv_182_12. (16S: KX865685, 28S: KX865802, COI: KX865931, go to Genbank) ditto.

RMBH_biv_182_3. (16S: KX865684, 28S: KX865801, COI: KX865930, go to Genbank) ditto.

Thailand

UF_507795 (ICH-00819). (COI: MT905801, go to Genbank) Thailand, Mekong River at Ban Huai Sueam Nuea on Rt. 212 (18.416475, 103.546337) .

UF_507792 (ICH-00812). (COI: MT905797, go to Genbank) Thailand, Mekong River at Ban Tha Pho on Rt. 212 (18.338504, 103.720589).

UF_507792 (ICH-00813). (COI: MT905798, go to Genbank) ditto.

UF_507792 (ICH-00814). (COI: MT905799, go to Genbank) ditto.

UF_507833 (ICH-00892). (COI: MT905836, go to Genbank) Thailand, Mekong River at Muk River mouth in Mukdahan (16.546135, 104.731717) .

UF_507833 (ICH-00893). (COI: MT905837, go to Genbank) ditto.

UF_507751 (ICH-00750). (16S: MH346017, 28S: MH345997, COI: MH345977, go to Genbank) Thailand, Mekong River at Nong Khai (17.882349, 102.735204).

UF_507751 (ICH-00751). (COI: MT905776, go to Genbank) ditto.

UF_507751 (ICH-00752). (16S: MH346018, 28S: MH345998, COI: MH345978, go to Genbank) ditto.

UF_507758 (ICH-00737). (COI: MT905772, go to Genbank) Thailand, Trib. of Mekong River at Rt. 211 bridge approx. 3 km S of Ban Muang (18.15107, 102.178987).

RMBH_biv_119_5. (16S: KX865682, 28S: KX865799, COI: KX865928, go to Genbank) Thailand: Mekong River basin, Loei River.

RMBH_biv_119_6. (16S: KX865683, 28S: KX865800, COI: KX865929, go to Genbank) ditto.