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口螺亞科
鐘螺目鐘螺科之下的一個亞科 来自维基百科,自由的百科全书
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口螺亞科(Stomatellinae)是腹足綱軟體動物分類單元鐘螺目鐘螺科之下一個殼長3cm以下細小海螺的亞科[1]。 本亞科原來為口螺科(Stomatellidae Gray, 1840;亦作Stomatiidae[2][1]),又名琵琶螺科或廣口螺科[3],下領六個屬。
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分類學
在較早期的分類(例如:Treatise on Invertebrate Paleontology)口螺科被歸入原始腹足目(Archaeogastropoda),但「原始腹足目」這個分類現時國際上大多數文獻都已不再使用。
根據2005年的《布歇特和洛克羅伊的腹足類分類》,口螺科被歸入古腹足類(Vetigastropoda,又名原始腹足類)之下的鐘螺總科[4];然後基於 Williams et al. (2008)[5]及Williams et al. (2010)[6]的研究結果,本分類單元從廣口螺科(Stomatellidae)降級成為鐘螺科(Trochidae)之下的廣口螺亞科(Stomatellinae)[6]
形態描述
口螺亞科物種因其獨特的耳形殼、極度退化的螺旋部和異常擴大的體螺層等形態,曾被劃分為一個獨立的科。 The shells of species in this subfamily are mostly low-spired, subglobose, with few whorls. They are either 鮑-shaped or non-spiral and limpet-like. They lack an umbilicus. Most species lack an 螺厴. The 殼口 is very arge, and through it the interior of the last whorl is entirely visible from below. The interior of the shell is 彩虹色 because of a layer of 珍珠母. The muscle impression inside the shell is crescent-shaped.
The animal has a broad foot, longitudinally divided by a median line below, and tuberculate above. The muzzle is broad, ending distally in an oval disc. The mouth is rounded. The long tentacles are pointed. The eyes are situated on short and heavy peduncles outside and behind the tentacles. The epipodium is prominent, fleshy, with or without cirri. Frontal lobes are present. The mantle edge is simple or reflexed and foliated. There is no slit in the front. The operculum is small, horny, thin, multispiral and often wanting. The gill has a single curved plume on the left or on the outer side of the mantle cavity. Its distal third is free.[7]
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分類
口螺亞科現時包括下列各個屬:
- Calliotrochus P. Fischer, 1879
- Microtis H. Adams & A. Adams, 1850
- 擬滑石螺屬 Pseudostomatella Thiele, 1924
- 滑石螺屬 Stomatella Lamarck, 1816
- 口螺屬 Stomatia Helbling, 1779
- Stomatolina Iredale, 1937
- 異名
- Gena Gray, 1840: synonym of Stomatella Lamarck, 1816
- Microtina A. Adams in Sowerby, 1854: synonym of Microtis (gastropod)|Microtis H. Adams & A. Adams, 1850 (Not available : established conditionally as a substitute name for Microtis A. Adams, 1850 if considered a homonym of the plant genus Microtis R. Brown. However, A. Adams kept using Microtis as the valid name)
- Plocamotis P. Fischer, 1885: synonym of Stomatella Lamarck, 1816
- Stomax Montfort, 1810: synonym of Stomatia Helbling, 1779 (unnecessary substitute name for Stomatia)
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參考文獻
外部連結
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