Diaphera Albers, 1850

Diaphera Albers, 1850 View in CoL

Diaphera Albers, 1850: 210 View in CoL .

Diaphera View in CoL — Zilch, 1960: 574.

Diaphera View in CoL — Richardson, 1988: 5.

Diaphera View in CoL — 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).