Angustopila tetradon Pall-Gergely & Hunyadi, 2023
publication ID |
https://dx.doi.org/10.3897/zookeys.1147.93824 |
publication LSID |
lsid:zoobank.org:pub:9BB9881B-0076-473D-8E53-155D37CA1F50 |
persistent identifier |
https://treatment.plazi.org/id/F84D6F13-0CC2-4D02-955A-1C4549C121B7 |
taxon LSID |
lsid:zoobank.org:act:F84D6F13-0CC2-4D02-955A-1C4549C121B7 |
treatment provided by |
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scientific name |
Angustopila tetradon Pall-Gergely & Hunyadi |
status |
sp. nov. |
Angustopila tetradon Pall-Gergely & Hunyadi sp. nov.
Figs 93 View Figure 93 , 94 View Figure 94
Type material.
Holotype: Vietnam • 1 empty shell (H: 0.82 mm, D: 0.79); Thanh Hóa Province, Như Thanh District, Hải Vân, Hang Lò Cao Kháng Chiến, vicinity of the cave (locality code: 2020/41); 19°37.08'N, 105°34.63'E; 20 m a.s.l.; 14 Feb. 2020; A. Hunyadi leg.; HNHM 105320.
Paratypes: Vietnam • 76 shells; same data as for holotype; coll. HA • 3 shells; same data as for holotype; coll. JJV • 48 shells; Thanh Hóa Province, Như Thanh District, 600 m south from Xuân Khang along road no. 45, around the cave temple (locality code: 2020/40); 19°40.35'N, 105°31.07'E; 80 m a.s.l.; 14 Feb. 2020; A. Hunyadi leg.; coll. HA.
Additional material.
Vietnam • 22 j/b shells; same data as for holotype; coll. HA • 1 j/b shell; Thanh Hóa Province, Như Thanh District , 600 m south from Xuân Khang along road no. 45, around the cave temple, (locality code: 2020/40); 19°40.35'N, 105°31.07'E; 80 m a.s.l.; 14 Feb. 2020; A. Hunyadi leg.; coll. HA.
Diagnosis.
A small, conical Angustopila species with a strong parietal tooth, a strong subcolumellar tooth, and two strong palatal teeth situated relatively close to peristome edge.
Description.
Shell small for the genus, slightly higher than wide or slightly wider than high; colourless, translucent, conical-globular with a high-domed spire; body whorl widest from standard apertural view; protoconch consists of ca. 1.5 whorls, with weak signs of spiral striation preceding the first teleoconch whorl; teleoconch with some fine, irregular radial growth lines and much stronger, equidistantly-arranged spiral striae (ca. 15-17 on body whorl from standard apertural view); whorls 3.75-4, slightly shouldered; aperture slightly curved and in line with shell axis in lateral view; umbilicus wide; aperture subquadrate, sinulus broad; peristome expanded, not reflected; parietal callus not protruding, not detached from penultimate whorl; parietal tooth prominent, high, perpendicular to parietal side or slightly bent, almost reaching edge of peristome; palatal wall with two rather low but prominent palatal teeth (upper and lower palatal teeth), situated in rather small distance from peristome; subcolumellar tooth low, blunt, nearly reaching peristome edge.
Measurements (in mm).
H = 0.73-0.87, D = 0.74-0.84, H/D*100 = 92.8-113 (n = 14), RUD = 26.3-30.8 (n = 4).
Differential diagnosis.
The upper palatal tooth of A. quadridens sp. nov. is situated deeper, its subcolumellar tooth is more elevated, and its sinulus is narrower resulting in a more elongated aperture shape. Moreover, the shells of A. tetradon sp. nov. are more conical (instead of conical-globular) than those of A. quadridens sp. nov.
Etymology.
The specific epithet refers to the four apertural barriers of this new species ( Angustopila tetradon : τετρα = four, and ὀδούς = tooth).
Distribution.
This species is known from two geographically adjacent sites in Thanh Hóa Province, northern Vietnam (Fig. 55 View Figure 55 ).
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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