Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Unionini | Unionina | Unio
11 available nominal species synonyms (19 total synonyms)
Unio crassus gontieri — Graf (2007), Lopes-Lima et al. (2017)
Crassiana musiva gontieri — Kantor et al. (2010)
Eolymnium colchicum — Kantor et al. (2010)
Crassiana mengrelica [sic] — Kantor et al. (2010)
Eolymnium raddei — Kantor et al. (2010)
Crassiana crassa sieversi — Kantor et al. (2010)
Unio stepanoffi — Kantor et al. (2010)
Eolymnium koutaisianum — Kantor et al. (2010)
Crassiana gregorii — Kantor et al. (2010)
Crassiana sobriewskii — Kantor et al. (2010)
Crassiana stevenianiformis — Kantor et al. (2010)
Unio crassus — IUCN (2014), Araujo et al. (2018)
Unio (Eolymnium) colchicus — Vinarski & Kantor (2016)
Unio (Crassiana) mengrelicus [sic] — Vinarski & Kantor (2016)
Unio (Eolymnium) raddei — Vinarski & Kantor (2016)
Unio (Eolymnium) byzantinus — Vinarski & Kantor (2016)
Unio (Crassiana) musivus — Vinarski & Kantor (2016)
Unio (Eolymnium) koutaisiana — Vinarski & Kantor (2016)
Unio (Crassiana) gregorii — Vinarski & Kantor (2016)
Unio (Crassiana) sobrievskii [sic] — Vinarski & Kantor (2016)
Unio (Crassiana) stevenianiformis — Vinarski & Kantor (2016)
Unio gontierii — Lopes-Lima et al. (2024), Hou et al. (2024), Campbell & Lydeard (2026)
Streams draining to the Black and Caspian Seas in Ukraine to Georgia. (North Eurasia: EU1)

There are no specimens for this species in the MUSSELpdb.
RMBH_biv_479_1. (COI: OR841920, go to GenBank) Bzyb River (Bzyb Basin), Georgia (43.187713, 40.291184).
RMBH_biv_479_3. (COI: OR841921, go to GenBank) ditto.
RMBH_biv_479_4. (COI: OR841922, go to GenBank) ditto.
RMBH_biv_479_5. (COI: OR841923, go to GenBank) ditto.
RMBH_biv_479_6. (COI: OR841924, go to GenBank) ditto.
CIIMAR_BIV1534. (COI: OR841925, mtGenome: OR912550, SRA: SRX22628947, go to GenBank) Inkiti (Bzyb Basin), Georgia (43.179089, 40.319573).
CIIMAR_BIV1535. (COI: OR841926, go to GenBank) ditto.
RMBH_biv_239_1. (COI: OR841927, go to GenBank) Rioni River (Rioni Basin), Georgia (42.223328, 42.695068).
RMBH_biv_239_10. (COI: OR841928, go to GenBank) ditto.
RMBH_biv_239_11. (COI: OR841929, go to GenBank) ditto.
RMBH_biv_239_12. (COI: OR841930, go to GenBank) ditto.
RMBH_biv_239_2. (COI: OR841931, go to GenBank) ditto.
RMBH_biv_239_5. (COI: OR841932, go to GenBank) ditto.
RMBH_biv_239_6. (COI: OR841933, go to GenBank) ditto.
RMBH_biv_239_7. (COI: OR841934, go to GenBank) ditto.
RMBH_biv_239_8. (COI: OR841935, go to GenBank) ditto.
RMBH_biv_239_9. (COI: OR841936, go to GenBank) ditto.
SAMN38361564. (SRA: SRX22628947, go to GenBank)