// Workers AI · dad joke modeWhat did the excised slitshell say? Shell shocked.

Excised slitshell
Conservation status
	; Extinct (IUCN 2.3)
	; Presumed Extinct (NatureServe)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	incertae sedis
Family:	Pleuroceridae
Genus:	†Gyrotoma
Species:	†G. excisa
Binomial name
	†Gyrotoma excisa; (Lea, 1843)
Synonyms
	List Anculosa incisa Lea, 1843 ; Gyrotoma ampla Anthony, 1860 ; Gyrotoma bulbosa Anthony, 1860 ; Gyrotoma carinifera Anthony, 1860 ; Gyrotoma demissa Anthony, 1860 ; Gyrotoma excisum (Lea, 1843) ; Gyrotoma ovalis Anthony, 1860 ; Gyrotoma ovoidea Shuttleworth, 1845 ; Gyrotoma quadrata Anthony, 1860 ; Gyrotoma recta Anthony, 1860 ; Gyrotoma robusta Anthony, 1860 ; Gyrotoma salebrosa Anthony, 1860 ; Melania (Schizostoma) excisa Lea, 1843 ; Melania excisa Lea, 1843 ; Melatoma alabamense (Lea, 1860) ; Melatoma ellipticum Reeve, 1861 ; Melatoma nucula Reeve, 1861 ; Melatoma quadratum Reeve, 1860 ; Melatoma rectum Reeve, 1860 ; Melatoma sphaericum Reeve, 1861 ; Schizochilus showalterii Lea, 1860 ; Schizostoma alabamensis Lea, 1860 ; Schizostoma buddii Lea, 1845 ; Schizostoma castanea Lea, 1860 ; Schizostoma constrictum Lea, 1845 ; Schizostoma curtum Gould, 1844 ; Schizostoma funiculatum Lea, 1845 ; Schizostoma glandula Lea, 1860 ; Schizostoma glans Lea, 1860 ; Schizostoma hartmanii Lea, 1860 ; Schizostoma laciniatum Lea, 1845 ; Schizostoma showalteriana Tryon, 1873 ; Schizostoma showalterii Lea, 1864 ; Schizostoma virens Lea, 1860 ; Schizostoma wheatleyi Lea, 1868;

The excised slitshell, scientific name †Gyrotoma excisa, was a species of freshwater snail, an aquatic gastropod mollusk in the family Pleuroceridae. This species was endemic to the United States. It is now extinct.

References

↑ Bogan, A.E.; et al. (Mollusc Specialist Group) (2000). "Gyrotoma excisa". IUCN Red List of Threatened Species. 2000 e.T9597A13003925. doi:10.2305/IUCN.UK.2000.RLTS.T9597A13003925.en. Retrieved 17 November 2021.
↑ NatureServe. "Gyrotoma excisa". NatureServe Explorer. Arlington, Virginia. Retrieved 27 March 2026.
↑ Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Gyrotoma excisa (I. Lea, 1843)". MolluscaBase. World Register of Marine Species. Retrieved 31 March 2026.

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