Diaphera Albers, 1850

Páll-Gergely, Barna, Hunyadi, András, Grego, Jozef, Sajan, Sheikh, Tripathy, Basudev & Chen, Zhe-Yu, 2020, A review of the Diapheridae (Gastropoda: Eupulmonata: Streptaxoidea), with special emphasis on India and Myanmar, Raffles Bulletin of Zoology 68, pp. 682-718 : 688

Diaphera Albers, 1850

Diaphera Albers, 1850: 210 .

Diaphera — Zilch, 1960: 574.

Diaphera — Richardson, 1988: 5.

Diaphera — Schileyko, 2000: 800.

Type species. Cylindrella cumingiana L. Pfeiffer, 1845 (described in Philippi, 1845 –1847) by monotypy.

Diagnosis. Shell shape variable (cylindrical to spindle-shaped and ovoid and elongate conical), last quarter to half whorl free (exceptionally not, see remarks), apertural dentition agree with that of Sinoennea (parietal lamella + columellar lamella, upper palatal tooth situated on peristome, lower palatal tooth situated deeper). See also remarks.

Distribution. Philippines, Borneo, northern Vietnam, South China (Guangxi), Cambodia, Thailand, southern Myanmar.

Remarks. This genus is recognised and defined on the basis of a free aperture and part of the last whorl, approximately a quarter to half whorl long. Given the patchy distribution of this genus, and the otherwise diverse shell characters, it is likely that the species classified here do not form a monophyletic group, and the free aperture has evolved multiple times independently (see also Discussion). Diaphera turbanophora , new species, does not have this character, but agrees with other Diaphera in other respects.

Other than the Diaphera species inhabiting Myanmar, the following species are known from the continent (= outside of the Philippines and Borneo): D. densecostulata ( Möllendorff, 1901) ( Vietnam) , D. prima Panha in Sutcharit et al., 2010 ( Thailand), D. saurini Benthem Jutting, 1962 ( Cambodia) . A new Diaphera species is being described from Chinese Guangxi Province (Z.-Y. Chen & Páll-Gergely, in press).