環口螺科

環口螺科（學名：），又名山蝸牛科、旋風蝸牛科或叢螺科，是一個小型到大型的熱帶陸地蝸牛的系統分類科，而且牠們都有螺厣。根據2005年的《布歇特和洛克羅伊的腹足類分類》，牠們都屬於新進腹足類主扭舌類非正式群組的腹足綱軟體動物；在2017年的《布歇特等人的腹足類分類》，牠們的分類層級不變。

這個包含很多物種的高度多樣性分類單元，現時只包括舊世界和新世界熱帶及亞熱帶的物種。

本科的化石物種歷史最早可以追遡至古近纪，正常腹足綱物種爆發時期。

型態描述
The dextral shells are mostly of small and rarely medium size. The form of the shell varies from discoidal to turbinate. 其圓形的aperture一般都有修飾：有時會有一個裂口，又或 a constriction. 其最後的 can sometimes be disconnected  and then extends strongly from the winding plane. The螺厣is generally circular, which can be retracted deeply into the shell. Its form is multispiral and can be calcified or lacking calcareous overlay. The outer layer of the operculum can contain accessory deposits.

軟體的頭部有一個短短的。 The tentacles are round in cross-section, relatively long and taper to the end. The eyes are located at the base of the antenna on flat papillae. The longitudinal muscular foot is not divided. The mantle cavity acts as a lung cavity.其扭舌型齒舌每列都有七顆舌齒： has seven elements per transverse row. The central row of the radula contains usually five, rarely three or seven teeth.The animals are 雌雄異體.

系統分類與系統學
2005年的《布歇特和洛克羅伊的腹足類分類》採納了Wenz (1938)對當時還是「山蝸牛亞科」的分類方法，將這個亞科分為多個族。
這個分類將35個屬810個物種分配到下列各個亞科中。部分列出如下：

带管蜗牛亚科 Alycaeinae Blanford, 1864
Incertae sedis
帶管蝸牛屬 Alycaeus Gray, 1850
Awalycaeus Kuroda, 1951
双边凹螺属 Chamalycaeus Kobelt & Möllendorff, 1897
Dicharax Kobelt & Möllendorff, 1900
沟螺属 Dioryx Benson, 1859
後帶管蝸牛屬 Metalycaeus Pilsbry, 1900
Pincerna Preston, 1907
环口螺亚科 Cyclophorinae 
Tribe Caspicyclotini Wenz, 1938
Caspicyclotus Forcart, 1935
Tribe Cyathopomatini Kobelt & Möllendorff, 1897
Cyathopoma Blanford & Blanford, 1861
Jerdonia Blanford & Blanford, 1861
Mychopoma Blanford, 1869
Pseudojerdonia Kobelt, 1902
环口螺族 Cyclophorini 
 Afroditropis 
 Craspedotropis 
 Crossopoma 
 环口螺属 Cyclophorus 
 Cyclosurus 
 Ditropopsis 
 Elgonocyclus 
 東洋蝸牛屬 Japonia 
 兔唇螺属 Lagocheilus 
 青山蜗牛属 Leptopoma 
 Leptopomoides 
 Micraulax 
 Montanopoma 
 Myxostoma 
 Otopoma 
 Owengriffithsius 
 Papuocyclus 
 Pilosphaera 
 Ptychopoma 
 Scabrina 
 Theobaldius 
Tribe Cyclotini Pfeiffer, 1853
Cyclotus Swainson, 1840
Opisthoporus Benson, 1851
Platyrhaphe Möllendorff, 1890
Tribe Pterocyclini Kobelt & Möllendorff, 1897
Millotorbis Fischer-Piette & Bedoucha, 1965
Pterocyclos Benson, 1832
Rhiostoma Benson, 1860
Spiraculum Pearson, 1833
Incertae sedis
Pholeoteras Sturany, 1904
Incertae sedis
Incertae sedis
Pseudarinia Yen, 1952 †
Ventriculus Wenz in Fischer & Wenz, 1914
Subfamily Spirostomatinae Tielecke, 1940
Incertae sedis
Spirostoma Heude, 1885

2020年，带管蜗牛亚科從環口螺科獨立出去，成為了带管蜗牛科，仍屬環口螺總科。

參考文獻

外部連結

 Kobelt, W. (1909). Cyclophoridae. Berlin: Verlag von R. Friedländer und Sohn. The standard reference based on shell morphology.
 Nantarat, N., Sutcharit, C., Tongkerd, P., Ablett, J., Naggs, F. & Panha, S. (2014). An annotated catalogue of type specimes of the land snail genus Cyclophorus Monfort, 1810 (Caenogastropoda, Cyclophoridae) in the Natural History Museum, London. ZooKeys, 411, 1–56.