Bivalvia | Unionida | Unionoidea | Unionidae | Parreysiinae | Indochinellini | Indonaia
4 available nominal species synonyms (5 total synonyms)
Contradens gratiosus — Graf & Cummings (2007), Zieritz et al. (2018), Konopleva et al. (2019), Graf & Cummings (2021)
Parreysia (Radiatula) occata — Graf & Cummings (2007), Ramakrishna & Dey (2007)
Parreysia (Radiatula) lima — Ramakrishna & Dey (2007)
Radiatula occata — Nesemann et al. (2007), Zieritz et al. (2018)
Parreysia occata — Bogan (2010), IUCN (2010)
Uniandra gratiosus — Bogan (2010), IUCN (2012)
Radiatula gratiosus — Pfeiffer et al. (2021)
Indonaia occata — Graf & Cummings (2021)
Indonaia (cylindrica-group) gratiosa — Bolotov et al. (2022), Bolotov et al. (2024)
Indonaia gratiosa — Bolotov et al. (2022), Campbell & Lydeard (2026), Konopleva et al. (2026)
Distribution unknown but presumed to be from Indochina. (East Asia: AS5)


USNM_84077
Bengal, India
type
Unio occatus Lea, 1860

SMF_3628
Siliguri, Assam
paratypes
Unio siliguriensis Preston, 1908

BMNH_685-06-1-1
Barakkar [Barakar] R., Bengal

BMNH_620-06-1-1
Benares on Ganges

BMNH_MP_D060
Bengal

BMNH_MP_D416
Dehra Doon

BMNH_3291-03-7-1
Diyung R., N. Cachar

BMNH_MP_D063
India (Bengal in BM)

BMNH_546-06-1-1
Keem R., Surat

BMNH_465-06-1-1
Keem River, Surat

BMNH_607-06-1-1
Poonassa, Nimar

BMNH_427-06-1-1
Sattara, Deccan

BMNH_2446-03-7-1
Siligoori near base of Darjiling Hills

BMNH_MP_D062
Sillgooree, Bengal, India

BMNH_88-12-4-1706-1707
Burmah

BMNH_41-4-28-40-41
Australia [No - SE Asia]

BMNH_MP_0608
Australia [No - SE Asia]

NCSM_47254
Asia, Ganges Basin, Nepal, Bagmatī, Dhading Co. [Tanlewa Khola], [point estimates 13.1 air milses ESE center Khandbari]. 27.3° N, 87.41666° E

UF_93237
North India

UMMZ_109604
Sylhet, India

UMMZ_110017
Begal, India

UMMZ_109627
Bengal, India

UMMZ_109642
Dukhur, Bombay

UMMZ_109603
Silgooree, Bengal, India

UMMZ_110084
Siliguri, East Bengal, India

UMMZ_110014
Siliguri, India

UMMZ_60380
Wainganga River, Bhandara, Central Province, India

UMMZ_109644
Burma

UMMZ_22861
[no locality available - Asia]

USNM_84151
“New Holland” India?

USNM_84152
Deccan, India

USNM_348631
near Kamptee, India

USNM_126471
Tulpigorie, Bengal [India]
SMF_348834/17.15 [SMF_bf_75B]. (COI: OK480023, go to GenBank) Nepal: Jhajh nadi, 26.94°N, 85.31°E, Ganges River basin, Narayani Zone, Central Region.