Angustopila cavicola Pall-Gergely & Dumrongrojwattana, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1147.93824 |
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publication LSID |
lsid:zoobank.org:pub:9BB9881B-0076-473D-8E53-155D37CA1F50 |
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persistent identifier |
https://treatment.plazi.org/id/4EEC485D-638D-4136-95BF-340F508B04E8 |
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taxon LSID |
lsid:zoobank.org:act:4EEC485D-638D-4136-95BF-340F508B04E8 |
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treatment provided by |
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scientific name |
Angustopila cavicola Pall-Gergely & Dumrongrojwattana |
| status |
sp. nov. |
Angustopila cavicola Pall-Gergely & Dumrongrojwattana sp. nov.
Figs 30 View Figure 30 , 32 View Figure 32 , 33 View Figure 33
Type material.
Holotype: Thailand • 1 empty shell (H: 1.18 mm, D: 0.92 mm); Loei Province, Phu Tham Pha Tang; approx. GPS coordinates: 17°56.91'N, 101°55.35'E; 29 Jun. 2016; P. Dumrongrojwattana, P. Juangsantad, K. Khwantong, N. Namisa & P. Panthong leg.; CUMZ 7441.
Paratypes: Thailand • 2 figured shells, same data as for holotype; HNHM 100181 • 8 shells; same data as for holotype; coll. PD • 8 shells; same data as for holotype; coll. PGB • 2 specimens in ethanol; same data as for holotype; coll. PGB.
Additional material.
Thailand • 11 j/b shells; same data as for holotype; coll. PD . Laos • 1 shell; Udomxai Province, 6.5 km southeast from centre of Na Mor towards Udomxai, Ban Nathong, Tham Nathong , below cave spring (locality code: 2019/118); 20°52.37'N, 101°46.98'E; 635 m a.s.l.; 7 Oct. 2019; A. Hunyadi leg.; coll. HA GoogleMaps .
Diagnosis.
A medium-sized to large, conical Angustopila species with few whorls, a narrow umbilicus, a conspicuously large aperture, a strongly expanded peristome and a short but strong parietal tooth that points slightly towards the palatal wall.
Description (of the type sample).
Shell medium to large-sized for the genus, higher to much higher than wide; off-white, conical, apex broad, body whorl widest from apertural view; protoconch consists of 1.25 whorls, without spiral striation; teleoconch finely ornamented with irregular radial growth lines crossed by weak rows of irregularly spaced spiral threads (ca. 12-14 on body whorl from apertural view); sculpture weaker than in most other Angustopila species; whorls 3.5-4 (conspicuously few compared to large shell size), rounded; aperture slightly oblique to shell axis from lateral view; umbilicus very narrow; aperture subcircular, parietal callus convex; peristome strongly expanded especially at parietal and palatal region, not reflected; parietal callus overlapping and not smeared onto penultimate whorl; parietal tooth elevated, strong, normally long, slightly bent towards palatal side, does not reach parietal callus.
Measurements (in mm).
H = 1.02-1.18, D = 0.87-0.97, H/D*100 = 109.3-130.3 (shells from the type locality; n = 6), RUD = 17.6-19.8 (n = 3); H = 1.27, D = 0.99, H/D*100 = 128.3, RUD = 20.2 (2019/118; n = 1).
Differential diagnosis.
Angustopila fabella is smaller, has a more pointed apex, a comparatively smaller aperture, a weaker sculpture, and a less expanded peristome. All other conical species with a single tooth are much smaller than A. cavicola sp. nov.
Etymology.
This new species was collected inside a cave, in the dark zone ( Angustopila cavicola means cave-dweller in Latin).
Distribution.
The type series is known from Loei Province, Thailand. An additional, single shell, reminiscent of the typical A. cavicola sp. nov. shells, was collected in Northern Laos ca. 325 km north of the type series (Fig. 31 View Figure 31 ).
Remarks.
The single shell from Laos has an even weaker sculpture (practically smooth) and a lower parietal tooth than the Thai ones. Otherwise, it is similar to the Thai population in terms of shell size, and shell and aperture shapes.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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