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| Microparmarion sallehi Wu, Ezzwan & Hamdani, in Schilthuizen, Berenyi, Ezzwan, Hamdani, Wu, De Antoni, Vincenzi, de Gier, ... et Cicuzza, 2023. |
Abstract
Background:
During citizen-science expeditions to the Ulu Temburong National Park, Brunei, several individuals were collected of a semi-slug species of the genus Microparmarion that, based on morphology and in-the-field DNA-barcoding, was found to be an undescribed species.
New information:
In this paper, we describe Microparmarion sallehi Wu, Ezzwan & Hamdani, n. sp., after field centre supervisor Md Salleh Abdullah Bat. We provide details on the external and internal reproductive morphology, the shell and the ecology of the type locality, as well as a diagnosis comparing it with related species. DNA barcodes were generated for five individuals and used for a phylogenetic reconstruction. Microparmarion sallehi sp. n. and M. exquadratus Schilthuizen et al., 2019 so far are the only Bornean species of the genus that live in lowland forest; other species are found in montane forests.
Keywords: taxonomy, malacology, Borneo, new species, land snails, semi-slugs
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| Microparmarion sallehi, n. sp., photographs of living holotype, UBDM.7.00152, Kuala Belalong Field Studies Centre, Brunei Darussalam; a right lateral view; b left lateral view. |
Microparmarion sallehi Wu, Ezzwan & Hamdani, sp. n.
Diagnosis: This new species of Microparmarion stands out because of its shell, which, unlike other north Bornean species of the genus, has no discernible whorls. In that sense, it appears to be more closely related to Parmarion, with which it also shares the clearly keeled mantle. However, the genital set-up, with the looped part of the penis, the vas deferens connected terminally to the epiphallus and the unstalked gametolytic sac clearly fits with the Microparmarion genus definition (Simroth 1893; Vermeulen and Liew 2022). The looped part of the penis, which remains thick until the place where it is enveloped by the muscular sheath, places the species in ‘group 2’ of Vermeulen and Liew (2022).
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Etymology: The species epithet is a masculine genitive and honours the supervisor of the Kuala Belalong Field Studies Centre, Mr. Md Salleh Abdullah Bat, who recently retired. The taxon expedition, during which the species was described, was the last group he hosted before retirement. The name won the winning number of votes out of seven options during a voting session in which all participants of the 2022 expedition took part.
Menno Schilthuizen, Simon Berenyi, Nurilya Syamimi Muhammad Nazirul Ezzwan, Nur Izzah Amal Afiqah Hamdani, Harrison Wu, Luca De Antoni, Leonardo Vincenzi, Werner de Gier, Anthonie D. P. van Peursen, Iva Njunjić, Massimo Delledonne, Ferry Slik, Ulmar Grafe and Daniele Cicuzza. 2023. A New Semi-slug of the Genus Microparmarion from Brunei, discovered, described and DNA-barcoded on Citizen-science 'Taxon Expeditions' (Gastropoda, Stylommatophora, Ariophantidae). Biodiversity Data Journal. 11: e101579. DOI: 10.3897/BDJ.11.e101579
