Synonyms: Lampsilis radiata luteola

Distribution: Distributed in the lower Mississippi River and Texas Gulf drainages from the Nueces and Guadalupe rivers of southern Texas and north to the Trinity and Red Rivers. Recently collected specimens from southern Illinois have been genetically confirmed as L. hydiana (Stodola et al. 2021). Occurs in southeastern Oklahoma in the Little and Kiamichi Rivers where preliminary genetic analyses of those populations suggest they may be an undescribed species (A. Franzen, unpublished data). Also occurs in the Blue River and likely in the Poteau River.

Life History and Ecology: Frequently occurs in coarse gravel and sand in moderate current in creeks and medium sized streams. Likely periodic life history strategy that likely infects and metamorphoses on fishes that other Lampsilis species use, but specific hosts for L. hydiana have not been confirmed. Sexually dimorphic with female shells being more truncated and inflated posteriorly.

Special Status: none

Shell Description: click here for shell description

Literature cited:

Stodola, A. P., Lydeard, C., Lamer, J. T., Douglass, S. A., Cummings, K. S., & Campbell, D. (2021). Hiding in Plain Sight: Genetic Confirmation of Putative Louisiana Fatmucket Lampsilis hydiana (Mollusca: Unionidae) in Illinois. Freshwater Mollusk Biology and Conservation, 24(2), 59-86.