Naggsia oligogyra, Pall-Gergely, 2018
publication ID |
https://doi.org/ 10.5852/ejt.2018.455 |
publication LSID |
lsid:zoobank.org:pub:C445E95B-446A-4601-AAA3-C1CCBAB627F9 |
DOI |
https://doi.org/10.5281/zenodo.3818794 |
persistent identifier |
https://treatment.plazi.org/id/03CC87A0-6C65-8A6D-FD83-FCB0427FFDFB |
treatment provided by |
Valdenar |
scientific name |
Naggsia oligogyra |
status |
sp. nov. |
Naggsia oligogyra View in CoL sp. nov.
urn:lsid:zoobank.org:act:13CE6536-3C26-421E-ACA1-270750697E3A
Figs 31F View Fig , 32 View Fig G–H
Diagnosis
A large, flat, dextral species with few (5) whorls; parietal wall with a single lamella, and a main plica free from the deeply situated apertural fold.
Differential diagnosis
The shell of the new species resembles N. laomontana , which has about a whorl more and only a single lamella on the parietal wall.
Etymology
The species is named after its few whorls, from the Greek ‘ oligos ’, meaning few and ‘ gyros ’, meaning whorl.
Material examined
Holotype
THAILAND: 1 shell (D = 21.0 mm), Chiang Mae Province , Doi Pha San Sao Mountain, 1 km W of Ban Prang Ma-o, 19°25′58.26″ N, 99°4′14.02″ E, 500 m a.s.l., 19 Jun. 1987, F.G. Thompson leg. ( UF 346781).
GoogleMapsParatypes
THAILAND: 2 broken shells, same data as for holotype ( UF 448574); 1 broken shell, same data as for holotype ( HNHM 97457).
Description
SHELL. Dextral, flat, with five rapidly increasing whorls, separated by a rather shallow suture; only strongly weathered shells were available for study, and therefore the sculpture could not be observed in detail; protoconch with fine ribs; teleoconch with inconspicuous, irregular riblets and paler reddish transverse stripes; peristome relatively thin, only slightly reflected and thickened; parietal callus low and blunt; apertural fold weak, situated far from parietal callus.
One shell was opened. Parietal wall with a single, straight lamella having slight horizontal extensions above and below in both anterior and posterior directions; main plica free from lamella, starts near upper end of lamella, and does not reach apertural fold. Palatal wall with six plicae; first situated close to upper suture, short; second to fifth oblique, second being the longest; sixth curved, concave.
MEASUREMENTS (in mm). D = 21.0, H = 6.3 (holotype).
Distribution
The new species is known from the type locality only, where it occurs together with C. leiophis ( Fig. 17 View Fig ).
UF |
Florida Museum of Natural History- Zoology, Paleontology and Paleobotany |
HNHM |
Hungarian Natural History Museum (Termeszettudomanyi Muzeum) |
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.
Kingdom |
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Phylum |
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Class |
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Order |
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SuperFamily |
Plectopyloidea |
Family |
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SubFamily |
Plectopylinae |
Genus |