Amphigyra alabamensis

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Amphigyra alabamensis
Amphigyra alabamensis shell.jpg
shells of Amphigyra alabamensis
Tình trạng bảo tồn
Phân loại khoa học
Giới (regnum) Animalia
Ngành (phylum) Mollusca
Lớp (class) Gastropoda
(không phân hạng) clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Liên họ (superfamilia) Planorboidea
Họ (familia) Planorbidae
Chi (genus) Amphigyra
Loài (species) A. alabamensis
Danh pháp hai phần
Amphigyra alabamensis
Pilsbry, 1906[2]

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.

radula of Amphigyra alabamensis

Original description[sửa | sửa mã nguồn]

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.

Chú thích[sửa | sửa mã nguồn]

  1. ^ Bogan, A.E. 2000. Amphigyra alabamensis. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 27 November 2008.
  2. ^ a ă Pilsbry H. A. September 1906. Two new American genera of Basommatophora. The Nautilus, volume 20, number 5, pages 49-50.

Tham khảo[sửa | sửa mã nguồn]