Dicharax (?) biexcisus (Pilsbry, 1902)

Pall-Gergely, Barna, Sajan, Sheikh, Tripathy, Basudev, Meng, Kaibaryer, Asami, Takahiro & Ablett, Jonathan D., 2020, Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue, ZooKeys 981, pp. 1-220 : 1

publication ID	https://dx.doi.org/10.3897/zookeys.981.53583
publication LSID	lsid:zoobank.org:pub:5194AAC8-6B8A-473F-8A41-470A60182A0B
persistent identifier	https://treatment.plazi.org/id/F65D5868-FE7E-5435-8D0D-18D7DDCCDC14
treatment provided by	ZooKeys by Pensoft (2020-10-29 22:48:38, last updated 2024-11-25 21:42:09)
scientific name	Dicharax (?) biexcisus (Pilsbry, 1902)
status

Treatment

Dicharax (?) biexcisus (Pilsbry, 1902) Fig. 13C View Figure 13

Alycaeus biexcisus Pilsbry, 1902d: 26.

Awalycaeus biexcisus - Kuroda and Abe 1980: 20, pl. 2, figs 1-4.

Cipangocharax biexcisus - Minato 1981: 135-137, fig. 4; Minato and Abe 1982: 200-202, figs 10-12; Azuma 1982: 12, pl. 4, fig. 41; Minato 1988: 16, pl. 2, fig. 5; Minato 1993: 1, figs 2, 4.

Chamalycaeus (Cipangocharax) biexcisus - Egorov 2013: 36, fig. 64.

Type locality.

"Suimura, Awa".

Material examined.

ANSP 82660a (lectotype, designated by Baker 1964, photographs examined), Nagai-mura, Awa, Tokushima Pref., Japan, coll. Hirase (#263), NSMT-Mo 2050 (3 shells).

Remarks.

Protoconch low, finely granulated, rather matte; R2 with ca. 26 low, blunt, irregular ribs, which are connected to each other near the tube, gradually becoming free towards the edge of the body whorl (here the distance between neighbouring ribs is very small, much less than the width of a rib); no spiral lines visible on R1.

References

Azuma, M, 1982. Colored Illustrations of the Land Snails of Japan. Hoikusha, Osaka, [xv +] 333 pp. [pls 1-64]

Baker, B, 1964. Type land snails in the Academy of Natural Sciences of Philadelphia Part III. Limnophile and Thalassophile Pulmonata Part IV. land and fresh-water Prosobranchia. Proceedings of the Academy of Natural Sciences of Philadelphia 116: 149 - 193

Egorov, RV, 2013. Treasure of Russian Shells. Supplement 3. A review of the genera of the terrestrial pectinibranch molluscs (synopsis mainly based on published data). Part III. Littoriniformes: Liareidae, Pupinidae, Diplommatinidae, Alycaeidae, Cochlostomidae. R. Egorov, Moscow

Kuroda, T, Abe, Ch, 1980. The taxonomy and distribution of land and fresh water molluscs of Tokushima Pref., Shikoku, Japan (descriptions of sixteen new land shells). Bulletin of the Tokushima Prefectural Museum 11: 1 - 46

Minato, H, 1981. A new Alycaeid snail, Cipangocharax placenovitas n. sp. from limestone Region of Kochi-ken, Japan. Venus 40 (3): 135 - 137

Minato, H, Abe, Ch, 1982. Cipangocharax kiuchii n. sp. (Alycaeidae) from Limestone Region of Tokushima-ken, Japan. Venus 40 (4): 200 - 202

Minato, H, 1988. A systematic and bibliographic list of the Japanese land snails. H. Minato, Shirahama X

Minato, H, 1993. A key to the species of the genus Cipangocharax (Alycaeidae). Chiribotan 24 (1): 1 - 3

Figures

Figure 13. Type species of alycaeid genus-group taxa A Dicharax hebes (Benson, 1857) (SMF 109244; type species of Dicharax) B D. (?) abei (Kuroda, 1951) (NSMT 50125; type species of Awalycaeus) C D. (?) biexcisus (Pilsbry, 1902) (NSMT 263; type species of Cipangocharax) D D. (?) itonis (Kuroda, 1943) (NSMT 78866; type species of Sigmacharax). Close-up images of the aperture are not to scale. All photographs: Barna Pall-Gergely.