Bivalvia | ... | Unionoidea | Unionidae | Gonideinae | Limnoscaphini | Contradentina | Lens

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 semmelinki fultoni” ** — Lopes-Lima et al. (2017)
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), Chen et al. (2025), Campbell & Lydeard (2026), Zieritz et al. (2026)

Range

Mekong River, Cambodia, Laos, and Thailand. (East Asia: AS5)

Map of Georeferenced Specimens

specimens map of Lens comptus

MUSSELp Specimen Records

Type Specimens

image of lot SMF_220828
SMF_220828
Thailand: Mun River at Phibun Mangsahan
holotype
Harmandia munensis Brandt, 1974

image of lot MNHN_IM-2000-1661
MNHN_IM-2000-1661
Peam Chelang, Cambodge
syntype
Unio comptus Deshayes in Deshayes & Jullien, 1874

Other Specimens by Collection | show by country

1 Specimens from ANSP

image of lot ANSP_339099
ANSP_339099
Thailand: Ubon Prov., Khemmarat Amphoe Mekong River

18 Specimens from MNHN

image of lot MNHN_MP_3356
MNHN_MP_3356
Cochinchine

image of lot MNHN_MP_3366
MNHN_MP_3366
Cochinchine

image of lot MNHN_MP_3348
MNHN_MP_3348
Mekong River at Stung Treng, Cambodia

image of lot MNHN_MP_3595
MNHN_MP_3595
Srepock, Cambodge, a l’est de Stung Treng

image of lot MNHN_MP_3350
MNHN_MP_3350
Huai Kai, near Pakse, Laos

image of lot MNHN_MP_3354
MNHN_MP_3354
Laos: Mekong River at Muang Khong

image of lot MNHN_MP_3357
MNHN_MP_3357
Luang Prabang

image of lot MNHN_MP_2875
MNHN_MP_2875
Luang Prabang

image of lot MNHN_MP_3361
MNHN_MP_3361
Minam Feau Massie, Laos

image of lot MNHN_MP_PARIS2
MNHN_MP_PARIS2
Nam - Ou, Laos

image of lot MNHN_MP_3347
MNHN_MP_3347
Nam - Ou, Laos

image of lot MNHN_MP_3749
MNHN_MP_3749
Nam Co A Muong Sai, Haut Laos

image of lot MNHN_MP_3690
MNHN_MP_3690
Nam Pak, Nam Co, Nam Lan, Haut Laos

image of lot MNHN_MP_3346
MNHN_MP_3346
Riv. Menam, Laos Occidental

image of lot MNHN_MP_3351
MNHN_MP_3351
de la riviere Salabury, Siam

image of lot MNHN_MP_3364
MNHN_MP_3364
de la riviere Salabury, Siam

image of lot MNHN_MP_3352
MNHN_MP_3352
Siam

image of lot MNHN_MP_3353
MNHN_MP_3353
Tonkin...

5 Specimens from NCSM

image of lot NCSM_85232
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

image of lot NCSM_85228
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

image of lot NCSM_83060
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

image of lot NCSM_84934
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

image of lot NCSM_84935
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

10 Specimens from SMF

image of lot SMF_205127
SMF_205127
Laos;:Mekopng branch at Ban Done Det, S of Khong

image of lot SMF_319484
SMF_319484
Laos: Huai Kei bei Pakse

image of lot SMF_319382
SMF_319382
Laos: Mekong at Cham Pasak

image of lot SMF_205137
SMF_205137
Laos: Mekong Branch at Ban Done Det, S of Khong

image of lot SMF_205126
SMF_205126
Laos: Sedone River at Ban Hua Daeng, 9 km N of Pakse

image of lot SMF_239260
SMF_239260
Laos: Xedone River at Ban Hua Daeug, 8 km N of Pakse

image of lot SMF_319383
SMF_319383
Mekong Khong Island Laos

image of lot SMF_319410
SMF_319410
Mekong River at Khone Prov. Sithandone

image of lot SMF_13700
SMF_13700
Nam Ou, Laos

image of lot SMF_13702
SMF_13702
Salabury, Siam

2 Specimens from UA

image of lot UA_20998
UA_20998
Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos

image of lot UA_20999
UA_20999
Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos

14 Specimens from UF

image of lot UF_507417
UF_507417
Mekong River, 1.4 miles upstream from Sambour. CA16-08. 12.79459, 105.97255

image of lot UF_507403
UF_507403
Mekong River, 5.17 miles upstream of Mekong and Sekong Confluence. CA16-05. 13.59515, 106.01447

image of lot UF_507423
UF_507423
Mekong River, 700 ft downstream of Sandan. CA16-09. 12.68691, 106.01697

image of lot UF_507429
UF_507429
Mekong River, upstream of fishing village near the confluence of Tonle Sap River. CA16-10. 11.57207, 104.94050

image of lot UF_507396
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

image of lot UF_507390
UF_507390
Tonle Sekong River, 1.6 miles upstream from AH11 Bridge. CA16-03. 13.54504, 106.01353

image of lot UF_507386
UF_507386
Tonle Srepok River, bridge just north of Phumi Srê Ta Chan, Cambodia. CA16-02. 13.50248, 106.35194

image of lot UF_507380
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

image of lot UF_507827
UF_507827
Mekong River at Ban Hin Khan on Rt. 2034. TH16-46. 16.134, 105.032

image of lot UF_507795
UF_507795
Mekong River at Ban Huai Sueam Nuea on Rt. 212. TH16-36. 18.416, 103.546

image of lot UF_507792
UF_507792
Mekong River at Ban Tha Pho on Rt. 212. TH16-35. 18.339, 103.721

image of lot UF_507833
UF_507833
Mekong River at Muk River mouth in Mukdahan. TH16-48. 16.546135, 104.731717

image of lot UF_507751
UF_507751
Mekong River at Nong Khai. TH16-26. 17.882, 102.735

image of lot UF_507758
UF_507758
Trib. of Mekong River at Rt. 211 bridge approx. 3 km S of Ban Muang. TH16-28. 18.151, 102.179

6 Specimens from UMMZ

image of lot UMMZ_110864
UMMZ_110864
Cochinchine

image of lot UMMZ_110869
UMMZ_110869
Southeastern Asia

image of lot UMMZ_23070
UMMZ_23070
Cambogia

image of lot UMMZ_248794
UMMZ_248794
Laos: Mekong River at Khong, South Laos

image of lot UMMZ_110873
UMMZ_110873
Nam - Ou, Laos, Indo China

image of lot UMMZ_304347
UMMZ_304347
Nam Ou, Haat Veune Rapids, downstream of Gnot Ou, Phongsali Province, Laos (22°4’40” N, 101°46’ 0” E)

2 Specimens from USNM

image of lot USNM_786269
USNM_786269
Laos: Xedone River, at Ban Hua Daeng, 9 km N Pakse

image of lot USNM_786265
USNM_786265
Mekong at Ban Done Det, Laos

1 Specimens from other collections

image of lot SMRL_16888
SMRL_16888
Mekong branch at Ban Don Det

GenBank Vouchers

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: MH351013, 28S: MH345994, COI: MH350968, 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.

GenBank Vouchers Not Yet Georeferenced

NCSM_84935. (28S: KX822593, COI: KX822636, go to GenBank)

RMBH_biv_184_1. (28S: KX865804, COI: KX865933, go to GenBank)

RMBH_biv_184_3. (28S: KX865805, COI: KX865934, go to GenBank)

RMBH_biv_185_2. (28S: KX865806, COI: KX865935, go to GenBank)