The shoal sprite, scientific name Amphigyra alabamensis, was a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk trong họ Planorbidae, the ram's horn snails.
This species was endemic to Hoa Kỳ. It is now extinct.
Species Amphigyra alabamensis was originally được mô tả by Henry tháng 8us Pilsbry năm 1906.[2]
Type locality is Coosa River near or in Wetumpka, Alabama.
Pilsbry's original text (the type description) reads as follows:
“Amphigyra alabamensis n. sp. PI. III, figs. 1, 2.
The shell is shaped like a convex Crepidula, closely, finely and sharply striate spirally, and of a pale yellowish-corneous tint. The last whorl flares in a raised ledge at the baso-columellar region, the back being very convex. The spire is slightly sunken, depressed. The raised parietal margin of the lip is abruptly kinked where it passes across the preceding whorl. The columellar plate or deck extends over nearly one-third the total transverse length of the aperture. Alt. 1.1, diam. 2 mm.
Wetumpka, Alabama, on the under surfaces of rocks in swift water.
”The shoal sprite, scientific name Amphigyra alabamensis, was a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk trong họ Planorbidae, the ram's horn snails.
This species was endemic to Hoa Kỳ. It is now extinct.
