MUSSELpdb | valid sp. Lens eximius specimens

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Page last updated
Thu 17 July 2025

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

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

species Lens eximius (Lea, 1856): specimens
2 available nominal species synonyms

Recent Taxonomic Opinions

Physunio eximius — Graf & Cummings (2007), Sri-aroon et al. (2007), Bogan (2010), IUCN (2012), He & Zhuang (2013), Zieritz et al. (2018), Sahidin et al. (2021)
Physunio cf. eximius — Bolotov et al. (2017)
Contradens eximius — Bolotov et al. (2017), Bolotov et al. (2018), Huang et al. (2019), Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Lens eximius — Pfeiffer et al. (2021), Zieritz et al. (2021), Bolotov et al. (2022), Konopleva et al. (2023), Wu et al. (2024), Liu et al. (2024), Zieritz et al. (2024), Wu et al. (2024)
Physunio sp. 1 — Wu et al. (2021)

Range

Mekong in Thailand, Cambodia, and Laos.

Map of Georeferenced Specimens

species map

SMF_188710 Lam Chi River, near Ban Nia Nia, Prov. Roi Ett, Thailand	SMRL_MP_002 Lam Som	TMMUBI_95 Maenam Sa Gra Grang, Muang Nakonsawan
MNHN_MP_3081 Nam Sebay, affluent of Nam Moun, Laos, French Indo China

Cambodia

BMNH_1968658
Lao Mountains, Camboja

USNM_83899
Laos Mountains, Cambodia

Laos

SMF_225744 Laos: Huai Kei bei Pakse	ANSP_H19001 Laos: Mekong at Pakse	BMNH_MP_0722 Laos: Mekong at Pakse
SMF_319366 Laos: Mekong at Pakse	SMF_319366 Laos: Mekong at Pakse	SMF_319366 Laos: Mekong at Pakse

Thailand

UF_507829 Bang River at Rt. 2034 bridge approx. 5 km NW of intersection with Rt. 2277. TH16-47. 16.346, 104.883	UF_507490 Chi River downstream of HWY 225 in Talat Raeng. JMP17-37. 15.76964, 101.81476	UF_507484 Chi River off of Hwy 202 in Lat Yai. JMP17-36. 15.75328, 102.25225
UF_507851 Dom Noi River off Rt. 2248 approx. 3.5 km S of Buntharik. TH16-57. 14.728643, 105.398568	UF_507855 Dom Noi River off Rt. 2248 approx. 8.5 km S of Buntharik. TH16-58. 14.686046, 105.383334	UF_507862 Dom Yai River at Rt. 2248 bridge approx. 15 km ESE of Nam Yuen. TH16-59. 14.445989, 105.121116
SMF_198406 Gaeng Yang River betw, Pimun and Chong Mek	ANSP_H18999 Gaeng Yang River, between Pimum and Chong Mek, Thailand	USNM_786273 Gaeng Yang River, between Pimum and Chong Mek, Thailand
SMF_319477 Huai Thuai, Tha Uthen, Nakon Phanom	SMF_319477 Huai Thuai, Tha Uthen, Nakon Phanom	SMF_205119 Lam Chi Ban Ta Nang Ruen, Ban Phai, Kon Kaen
SMF_319365 Lam Chi River, Ban Ma Wa, Distr. Tawatburi, Prov. Roi Ett	SMF_319365 Lam Chi River, Ban Ma Wa, Distr. Tawatburi, Prov. Roi Ett	ANSP_H18995 Lam Chi River, Ban Mama, Twatburi, Thailand
USNM_786207 Lam Chi River, Ban Wa Ma, Prov. Roi Ett, Thailand	MCZ_281042 Lam Chi River, Mahachanachai, Ubon Ratchathani, Thailand	USNM_786220 Lam Chi River, Mahachanachai, Ubon Ratchathani, Thailand
TMMUBI_46 Lam chi, Ban MaMa - Tawarburi, Roi Ett, Thailand	SMF_188709 Lam Chi, Gantarawichai, Kalasin	TMMUBI_179 Lam Dom Yai
TMMUBI_140 Lam Dom Yai River	TMMUBI_158 Lam Dom Yai River	TMMUBI_168 Lam Dom Yai River
SMF_319363 Lam Don Yai, Det Udon, Ubon	ANSP_331303 Mae Nam Mun, Amphoe Tha Tum, Surin Prov. Thailand	ANSP_331303 Mae Nam Mun, Amphoe Tha Tum, Surin Prov. Thailand
SMF_319360 Maenam Choen W Kon Kaen	SMF_319360 Maenam Choen W Kon Kaen	TMMUBI_45 Maenam Choen, W Kon Kean, Thailand
USNM_786208 Maenam Lam Chi near Ban Ta Sabaeng; Prov. Roi Ett; Thailand	ANSP_H18996 Manam Choen, 40 km W Khon Kaen, Thailand	USNM_405723 Menam Mun, Ubon, E. Siam
SMF_188711 Moon [Mun] River, Ubon	ANSP_389038 Moon River, Ubon Prov., Thailand	BMNH_MP_0719 Mun River at Ban Ta Tum, Surin Prov., Thailand
BMNH_MP_0720 Mun River at Ban Ta Tum, Surin Prov., Thailand	BMNH_MP_0721 Mun River at Ban Ta Tum, Surin Prov., Thailand	MNHN_MP_3082 Mun River at Ban Tha Tum, Surin Prov., Thailand
UF_507596 Mun River at confluence with Chi River. TH15-01. 15.18188, 104.71430	MCZ_281040 Mun River at Rasi Salai, Sri Saket Prov. Thailand	MNHN_MP_3080 Mun River at Sri Saket, Thailand
SMF_188713 Mun River Ban Kha Yung	SMF_283246 Mun River, Ban Ta Tum	SMF_319355 Mun River, Ban Ta Tum
SMF_319355 Mun River, Ban Ta Tum	SMRL_2584 Mun River, Ban Ta Tum, Surin Prov. Thailand	MNHN_MP_3077 Mun River, Ban Ta Tum, Thailand
USNM_786204 Mun River, Ban Tha Tom, Surin Prov., Thailand	USNM_786203 Mun River, Ratchathani, Thailand	UF_507623 Pao River, trib. of Chi River at Rt. 214 bridge; Mun River drainage. TH15-06. 16.34022, 103.57584
UF_507475 Plai Mat River off HWY 2226/2175 in Tha Lat. JMP17-34. 15.28664, 102.68528	SMF_188715 Pong River at Pong Nib Damn	USNM_786206 Pong River at Pong Nip Dam, Kaen Province, Thailand
SMF_188714 Pong River N Kon Kaen	SMF_319358 Pong River Pa Nok Kao W Prov. Kon Kae	SMF_188719 River Pong at dam
ANSP_125590 Siam	ANSP_291122 Siam	ANSP_291122 Siam
USNM_83900 Siam	USNM_419836 Sri Saket, Siam	UF_346065 Thailand, Khon Kaen Province, 1.4km E intersection Highways 2038 and 12 Deep Muddy river, red clay banks, on rocks, wood and silty bottom 220 meters, 16° 29' N, 102° 25' E
FMNH_162652 Thailand, Maenam Mun, Ban Ta Tumm, Surin Prov.	MCZ_281043 Thailand; Mun River at Ubon	SMF_220840 Thailand: Ban Kah Yung
SMF_198405 Thailand: Lam Chi at Ban Ta Nang Ruen Ban Phai; Kon Kaen	SMF_283547 Thailand: Lam Chi at Ban Ta Nang Ruen Ban Phai; Kon Kaen	ANSP_H19000 Thailand: Lam Chi at Ban Ta Nang Ruen, Ban Phai
USNM_786270 Thailand: Lam Chi at Ban Ta Nang Ruen, Ban Phai, Kon Kaen	SMF_319353 Thailand: Lam Chi Gantarawichai, Kalsin	SMF_319353 Thailand: Lam Chi Gantarawichai, Kalsin
SMF_319352 Thailand: Lam Chi River at Ban Ta Nang Ruen; Ban Phai Kon Kaen Province	SMF_319352 Thailand: Lam Chi River at Ban Ta Nang Ruen; Ban Phai Kon Kaen Province	SMF_319352 Thailand: Lam Chi River at Ban Ta Nang Ruen; Ban Phai Kon Kaen Province
SMF_319352 Thailand: Lam Chi River at Ban Ta Nang Ruen; Ban Phai Kon Kaen Province	SMF_319352 Thailand: Lam Chi River at Ban Ta Nang Ruen; Ban Phai Kon Kaen Province	MCZ_281046 Thailand: Lam Chi River, Gantarawichai, Kalasin
USNM_786196 Thailand: Lam Chi River, Gantarawichai, Kalasin	SMF_188718 Thailand: Lam Chi River, Mahachanachai; Ubon	SMF_188716 Thailand: Lam Chi Tha Sabaeng; Roi Ett
SMF_319362 Thailand: Lam Chi Tha Sabaeng; Roi Ett	SMF_188712 Thailand: Mun River (Maenam Mun) Ban Tha Tum	SMF_319359 Thailand: Mun River at Ban Huai Khayung, Surin
SMF_BR2581 Thailand: Mun River at Tha Tum, Surin	SMF_319357 Thailand: Mun River at Ubon	SMF_319357 Thailand: Mun River at Ubon
SMF_319364 Thailand: Mun River Rasi Salai, Sri Saket	MCZ_266173 Thailand: Mun River, Ban Ta Tum	ANSP_H18998 Thailand: Mun River, Ban Tha Tum, Surin Province
MCZ_254336 Thailand: Mun River, Ban Tha Tum, Surin Province	UMMZ_230836 Thailand: Mun River, Ban Tha Tum, Surin Province	SMF_188717 Thailand: Mun River, Rasi Salai, Sri Saket
SMF_319361 Thailand: Pong River at Phong Nip Dam Khonkaen	SMF_319361 Thailand: Pong River at Phong Nip Dam Khonkaen	ANSP_H18997 Thailand: Pong River at Pong Nip Dam; Prov. Kon Kaen
SMF_319356 ThailandL: Mun River at Ubon Province	UF_507820 Thom River at Rt. 2034 bridge. TH16-45. 16.122, 105.031

UF_346061_04. Thailand, Khon Kaen Province, 1.4km E intersection Highways 2038 and 12 Deep Muddy river, red clay banks, on rocks, wood and silty bottom 220 meters, 16° 29' N, 102° 25' E

Vietnam

USNM_632941
Lao Bao, Vietnam

Georeferenced Genbank Vouchers

Thailand

UF_507829 (ICH-00884). (COI) Thailand, Bang River at Rt. 2034 bridge approx. 5 km NW of intersection with Rt. 2277 (16.34636, 104.88315)

UF_507829 (ICH-00885). (COI) Thailand, Bang River at Rt. 2034 bridge approx. 5 km NW of intersection with Rt. 2277 (16.34636, 104.88315)

UF_507829 (ICH-00886). (COI) Thailand, Bang River at Rt. 2034 bridge approx. 5 km NW of intersection with Rt. 2277 (16.34636, 104.88315)

UF_507851 (ICH-01175). (COI) Thailand, Dom Noi River off Rt. 2248 approx. 3.5 km S of Buntharik (14.728643, 105.398568)

UF_507855 (ICH-01184). (COI) Thailand, Dom Noi River off Rt. 2248 approx. 8.5 km S of Buntharik (14.686046, 105.383334)

UF_507623 (2014-0622). (COI) Thailand, Pao River, trib. of Chi River at Rt. 214 bridge; Mun River drainage (16.34022, 103.57584)

UF_507623 (2014-0623). (COI) Thailand, Pao River, trib. of Chi River at Rt. 214 bridge; Mun River drainage (16.34022, 103.57584)

UF_507623 (2014-0624). (COI) Thailand, Pao River, trib. of Chi River at Rt. 214 bridge; Mun River drainage (16.34022, 103.57584)

UF_507623 (2014-0625). (COI) Thailand, Pao River, trib. of Chi River at Rt. 214 bridge; Mun River drainage (16.34022, 103.57584)

UF_507475 (ICH-02131_AHE). (COI) Thailand, Plai Mat River off HWY 2226/2175 in Tha Lat (15.28664, 102.68528)

UF_507475 (ICH-02131). (COI, SRA) Thailand, Plai Mat River off HWY 2226/2175 in Tha Lat (15.28664, 102.68528)

UF_507475 (ICH-02132). (COI) Thailand, Plai Mat River off HWY 2226/2175 in Tha Lat (15.28664, 102.68528)

UF_507820 (ICH-00865). (COI) Thailand, Thom River at Rt. 2034 bridge (16.122257, 105.030754)

UF_507820 (ICH-00866). (COI) Thailand, Thom River at Rt. 2034 bridge (16.122257, 105.030754)

UF_507820 (ICH-00867). (COI) Thailand, Thom River at Rt. 2034 bridge (16.122257, 105.030754)

UF_507820 (ICH-00868). (COI) Thailand, Thom River at Rt. 2034 bridge (16.122257, 105.030754)

RMBH_biv_127_1. (28S, COI) Thailand: Mekong River basin, Chi River

RMBH_biv_127_2. (28S, COI) Thailand: Mekong River basin, Chi River

RMBH_biv_127_3. (16S, 28S, COI) Thailand: Mekong River basin, Chi River

RMBH_biv_121_1. (16S, 28S, COI) Thailand: Mekong River basin, Phong River

RMBH_biv_121_2. (16S, 28S, COI) Thailand: Mekong River basin, Phong River

RMBH_biv_121_3. (16S, 18S, 28S, COI, ND1) Thailand: Mekong River basin, Phong River