Bensonella boettgeri (Möllendorff, 1897)

Figs 39 B, 42, 43, 60

Boysidia boettgeri Möllendorff, 1897: 70.

Boysidia (Paraboysidia) boettgeri — Pilsbry 1917: 208–209, pl. 34, figs 7, 8.

Paraboysidia boettgeri — van Benthem Jutting 1950: 38; van Benthem Jutting 1952: 318; Zilch 1984: 164; Maassen 1999: 123.

Boysidia novemdentata Saurin, 1953: 115–116, fig. 1, pl. 4, fig. 4 a – c. syn. nov.

Boysidia novemdentata — Inkhavilay et al. 2019: 59, fig. 26 B.

Bensonella novemdentata — Inkhavilay and Sutcharit 2024: 444, fig. 4.

Type material examined.

Indonesia • lectotype of B. boettgeri; W Java; collector unknown; SMF 4616 . Laos • 1 syntype of B. novemdentata; Pah Hia, Laos; collector unknown; MNHN -IM-2000-33881 .

Additional material examined.

India • 6 shells; Nagaland, Naga hills; UF 00112290 / 5, UF 179749 / 1 • 3 shells; Eastern Naga Hills; W. Doherty leg.; NHMUK 1903.7. 1.2853.

Type localities.

Java, Indonesia ( B. boettgeri); “ environs du village méo de Pah Hia, à 100 kilomètres au Sud de Xieng-Khouang, chef-lieu de la province du Tran Ninh, Laos ” (probably refers to Ban Namthong, Longchaeng District, Xaisomboun Province, Laos, see Páll-Gergely et al. 2016) ( B. novemdentata).

Differential diagnosis.

Even though there are no peculiarities regarding the apertural dentition of this species, it can be separated from all its congeners by the far most triangular, elongated shell and relatively shallow suture.

Distribution.

This species is described from Java, Indonesia, but is also known from its synonym ( B. novemdentata) in Laos. It has also been found in E India.

Remarks.

Boysidia novemdentata was described from northeastern Laos,> 2800 km from the type locality of B. boettgeri . However, these two species are virtually identical in shell morphology. See the discussion section.