Corresponding author: Min Wu (
Academic editor: F. Köhler
Two new species,
Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37–46.
The malacofauna of western Hubei has usually been studied at some well-known localities along the Yangtze River, for example in Badong and Changyang (
Photographs of the shells and the habitats were taken using a Canon 5D Mark IV camera. The shells were measured with digital vernier calipers to the nearest 0.1 mm. Whorls were counted as described by
Abbreviations:
Shell minute, dextral, thin, translucent, cylindrical. Penultimate whorl strongly constricted. Last whorl strongly ascending, covering part of penultimate whorl. Protoconch oblique. Apical whorls depressed, with strong or weak ribs. Aperture rounded; peristome double, expanded but not reflected. Columellar lamella not visible from aperture but internally present; one parietal lamella and one palatal plica extending inwards from last whorl to penultimate whorl (in type species). Palatal plica visible through semitransparent parietal wall. Constriction absent or very weak where lamellae and plica terminate. Umbilicus closed, forming a chink.
Combination of the Latin prefix sino- (= China) with
Southern China (Hubei, Guizhou), northern Vietnam.
The new genus can be distinguished from the sympatric diplommatinid genera (
Three species,
华阿勇螺属
Shell width = 1.6–1.7 mm, shell height = 2.4–2.7 mm (
Shell minute, cylindrical and apically flat. Penultimate whorl strongly constricted. Columellar lamella, one parietal lamella and one palatal plica present.
Shell minute, dextral, cylindrical, translucent, with 5½ whorls. Shell suture depressed. Protoconch oblique, with no obvious sculpture. Upper whorls depressed. Penultimate whorl so strongly constricted that ½ whorl is invisible. Last whorl strongly ascending, dorsally covering part of penultimate whorl. Ribs strong and sharp, concentrated around umbilical region. Aperture rounded. Peristome double, expanded but not reflected. Angular protrusion weakly present near basal columella. Columellar lamella invisible from aperture, but stronger at penultimate whorl. One parietal lamella and one palatal plica extending from last whorl to penultimate whorl (Fig.
Map of sampling sites and type localities
This name honors the herpetologist, Prof. Liang Fei, who encouraged the first author to carry out the research work.
China, Hubei, Wufeng Tujiazu Autonomous County, Chaibuxi National Forest Park,
This species is known only from the type locality.
Inner structure of
费氏华阿勇螺
1 | Shell height greater than 3 mm |
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– | Shell height less than 3 mm |
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2 | Whorls fewer than 5. Shell width / shell height approximately 0.9 |
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– | Whorls more than 5. Shell width / shell height approximately 0.5–0.7 |
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3 | Shell height greater than 2 mm. Shell ribs strong |
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– | Shell height less than 2 mm. Shell ribs weak |
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平沟螺属
峡谷平沟螺
HBUMM10018 (Fig.
“Phong-Tho, Tonkin”.
Yunnan.
弱肋平沟螺
We thank Mr Xiao-Ran Zhu for collecting