Bensonella exploda Gojsina, Hunyadi & Pall-Gergely 2025, sp. nov.
Creators: name: Gojšina, Vukašin
name: Hunyadi, András
name: Sutcharit, Chirasak
name: Tongkerd, Piyoros
name: Auffenberg, Kurt
name: Grego, Jozef
name: Vermeulen, Jaap J.
name: Reischütz, Alexander
name: Páll-Gergely, Barna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Hypselostomatidae
Bensonella
Bensonella exploda

description: Bensonella exploda Gojšina, Hunyadi & Páll-Gergely sp. nov.
Figs 39 F, 52, 53, 54, 100
Type material.
Holotype. Myanmar • 1 shell (SH: 1.8 mm, SW: 1.8 mm); Shan State, Pinlaung centre N 7.5 km, Tar Kge, near “ Big Bang Cave ”; 20°10.273'N, 96°47.442'E; 1540 m a. s. l.; 04 Oct. 2018; A. Hunyadi, K. Okubo & J. U. Otani leg.; CUMZ 14446. Paratypes. Myanmar • 32 shells; same data as for holotype; coll. HA • 1 shell; same data as for holotype; coll. VG.
Additional material examined.
Myanmar • 3 shells (juveniles, not paratypes); same data as for holotype; coll. HA • 149 shells; Shan State, 5.7 km south-southwest from centre of Pinlaung, Wingabar Taung; 20°4.152'N, 96°46.232'E; 1510 m a. s. l.; 04 Oct. 2018; A. Hunyadi, K. Okubo & J. U. Otani leg.; coll. HA.
Type locality.
Myanmar, Shan State, Pinlaung centre N 7.5 km, Tar Kge, near “ Big Bang Cave ”; 20°10.273'N, 96°47.442'E; 1540 m a. s. l.
Diagnosis.
Colourless Bensonella species with triangular conical-ovoid and spirally striated whorls. Last whorl slightly ascending near the aperture. Aperture equipped with eight strong barriers (angular, parietal, infraparietal, columellar, lower palatal, interpalatal, upper palatal, and a palatal tubercle). Umbilicus narrow but clearly wider than in majority of congeners.
Description.
Shell strongly triangular, conical-ovoid, colourless, consisting of 5–5.5 regularly growing whorls separated by a moderately deep suture. All whorls rounded, convex. Protoconch-teleoconch boundary not clearly visible due to the similar surface sculpture and colouration. Protoconch with ten coarsely and equidistantly spaced spiral striae. Teleoconch also spirally striated but additionally with coarse radial growth lines which are roughly equidistant. Spacing between two spiral striae irregular, it ranges from the width of two to the width of four spiral striae. Last whorl flat at its base, adnate to the penultimate (but peristome not fully leaning on it), slightly ascending near the aperture (~ 5 ° compared to the shell axis) making the apertural profile weakly opisthocline to the shell axis. Peristome white, expanded but not reflected. Sinulus well-rounded and distinctly separated from the rest of the aperture. Aperture equipped with eight barriers (angular, parietal, infraparietal, columellar, lower palatal, interpalatal, upper palatal, and a palatal tubercle). All barriers relatively strong. Parietal lamella is the strongest in the aperture and wavy. Angular lamella is longer than the parietal and reaching closer to the expanding peristome. It is sinuated in its middle part. Infraparietal lamella ~ 1.5 × weaker than the columellar, short. Columellar lamella strong as the lower palatal or slightly stronger. It is positioned obliquely to the shell axis, directed towards the parietal lamella. Basal plica absent. Palatal plicae all equally strong and relatively short, upper palatal is usually the shortest. Interpalatal situated halfway between the upper and lower palatal. Palatal tubercle prominent, sitting on the palatal lip and roughly in the level with upper palatal plica. Surface of all apertural barriers is finely granulated. Umbilicus narrow (but clearly wider than in the majority of congeners), measuring ~ 1 / 8–1 / 9 of the shell width.
Differential diagnosis.
This species differs from other congeners by the combination of the flat base of the last whorl, spirally striated whorls, and wider umbilicus.
Measurements
(in mm, n = 5). SH = 1.77–1.89; SW = 1.58–1.71; AH = 0.71–0.77; AW = 0.66–0.68.
Etymology.
This species is named exploda after its type locality, the “ Big Bang Cave ”.
Distribution.
This species is known only from two localities in Shan State, Pinlaung.
Remarks.
The specimens from Wingabar Taung (Fig. 54) share all the characters with the specimens from Big Bang Cave but have weaker apertural barriers.
description: Published as part of Gojšina, Vukašin, Hunyadi, András, Sutcharit, Chirasak, Tongkerd, Piyoros, Auffenberg, Kurt, Grego, Jozef, Vermeulen, Jaap J., Reischütz, Alexander & Páll-Gergely, Barna, 2025, A new start? Revision of the genera Anauchen, Bensonella, Gyliotrachela and Hypselostoma (Gastropoda, Eupulmonata, Hypselostomatidae) of Southeast Asia with description of 46 new species, pp. 1-338 in ZooKeys 1235 on pages 1-338, DOI: 10.3897/zookeys.1235.145281