Pseudopomatias caligosus, Páll-Gergely & Hunyadi, 2018
publication ID |
https://doi.org/ 10.5252/zoosystema2018v40 |
publication LSID |
urn:lsid:zoobank.org:pub:1B3E0AE7-2EEE-4C6A-B408-955B5695D82E |
DOI |
https://doi.org/10.5281/zenodo.3811407 |
persistent identifier |
https://treatment.plazi.org/id/417CEF05-FFE8-FFE3-C02E-FB15FCB88119 |
treatment provided by |
Felipe |
scientific name |
Pseudopomatias caligosus |
status |
sp. nov. |
Pseudopomatias caligosus View in CoL n. sp.
( Fig. 3 View FIG )
TYPE MATERIAL. — Thailand. Mae Hong Son Province, 9.1 km from Ban Soppong towards Mae Hong Son, left side of road # 1095, 785 m a.s.l., 19°33.123’N, 98°11.694’E, leg. Hunyadi A., 09.II.2015., HNHM 100176 (holotype), GoogleMaps HNHM 100442 (figured paratype), GoogleMaps coll. HA (17 paratypes + 9 juvenile shells [not paratypes]), GoogleMaps coll. PGB, 2 paratypes GoogleMaps .
ETYMOLOGY. — The specific epithet caligosus (Latin: covered with mist) refers to the nickname of the Thai Province Mae Hong Son (“city of three mists”).
TYPE LOCALITY. — Thailand, Mae Hong Son Province, 9.1 km from Ban Soppong GoogleMaps towards Mae Hong Son, left side of road # 1095, 785 m a.s.l., 19°33.123’N, 98°11.694’E.
DIAGNOSIS. — Shell medium sized to large for the genus, slender turriform with regular ribs, very fine spiral striation (mostly on the upper whorls), and a reflected peristome.
DIFFERENTIAL DIAGNOSIS. — This new species is most similar to P. peguensis ( Theobald, 1864) in terms of shell size and the bulging whorls, but differs from that species in the less glossy shell, the much stronger ribs, and the reflected peristome. Pseudopomatias shanensis Páll-Gergely, 2015 also has less bulging whorls, a more
strongly expanded peristome and denser ribs with clearly visible spiral striation between them.
DISTRIBUTION. — This species is known from the type locality only.
DESCRIPTION
Shell off-white to yellowish, all examined shells covered in reddish soil; shell very slender turriform, widest at its base; the 8.5-9.25 (n = 5), strongly bulging whorls separated by deep suture; protoconch with 2.5 whorls, first c. 0.75 whorl very finely granulated; remaining whorls very finely, regularly ribbed; teleoconch also finely, regularly ribbed; ribs rather strong, with triangular cross section; upper whorls with very fine spiral and radial lines, visible only under strong magnification ( Fig. 3F View FIG ); spiral lines getting weaker and less regular on last c. 2 whorls (here area between ribs dominated by very fine radial lines, Fig. 3G View FIG ); aperture rounded with very slightly angled columellar-parietal transition and slightly more sharply angled parietal-palatal transition; peristome whitish, expanded and strongly reflected; inner peristome protruding in some specimens, but the boundary between inner and outer peristomes usually hardy visible.
Operculum
Proteinaceous (“horny”), thin, flat (not concave); outer surface multispiral without elevated lamina; inner surface glossy, with a small, but elevated ventral nipple.
Radula ( Fig. 3F View FIG )
Radula taenioglossate. Radular teeth arranged in v-shaped rows, each transverse row with seven teeth (2-1-1-1-2). Central (rachidian) tooth not constricted at its middle, with well-developed, slender, pointed central cusp and one smaller, pointed lateral cusp on each side; inner marginal (= lateral) teeth with four cusps, all pointed, central cusp being the largest; two outer marginal teeth with 4-4 slender, pointed cusps (except for the outermost cusp of outer marginal tooth, which is rather blunt triangular).
Measurements (in mm)
H = 9.7-12, D = 3.8-4.4 (smallest and largest shells measured).
PGB |
PGB |
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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