Enantiomorphs and taxonomy of three conchological species in flat-shelled snails Trichocathaica (Pulmonata, Camaenidae)
Author
Pall-Gergely, Barna
Author
unyadi, Andras
Author
Asami, Takahiro
text
ZooKeys
2018
810
19
44
http://dx.doi.org/10.3897/zookeys.810.29824
journal article
http://dx.doi.org/10.3897/zookeys.810.29824
1313-2970-810-19
F67F5B77293D49D997D93E147A5B80C0
F67F5B77293D49D997D93E147A5B80C0
Trichocathaica puteolata
Pall-Gergely
sp. n.
Figure 11
A-C
Laeocathaica (Trichocathaica) lyonsae
- Wenz 1960: 639, fig. 2235.
Material examined.
China, Sytschuan,
"Huegel
bei der
Faehre
aus Ta Tu Ho bei %" (one side of the label), "Fulin Ton boden, Maisfelden, 31.07.1930" (other side of the label), SMF 24666a/1 (holotype, orig. Handb. Pal. 2235); same data, SMF 349516/61 shells (most of them are juveniles); same data, SMF 349514/1 paratype shell (orig. Yen, 1939: plate 15, fig. 43); China, Sytschuan, Osthang des Lu-ho (=Ta Tu-Ho), s. Lu Tin Chouw (?), ex coll. K. Krejci-Graf, 04,08,1930 (1933), SMF 24665/15 (most of them are juveniles).
Diagnosis.
Shell large, sinistral, body whorl keeled above mid-part of body whorl, teleoconch roughly wrinkled with moderately large, slender periostracal folds, fold scars represented as deep pits.
Description.
Shell sinistral, spire very slightly elevated in most specimens (dorsal side nearly flattened), but in some shells dorsal surface domed; body whorl slightly keeled, keel situated above mid part of body whorl; protoconch consists of 1.25-1.75 whorls, finely, irregularly wrinkled; entire shell with 4.5-5.5 whorls; teleoconch roughly, irregularly wrinkled, with moderately large, slender triangular, sometimes cylindrical, hair-like periostracal folds having short, curved base; in specimens/shell parts without periostracum the base of folds visible as deep fold scars; aperture subcircular, peristome slightly expanded, thin, sharp; inner thickening parallel to the peristome weak.
Figure 11. Shells (A, D), dorsal (B, E), and ventral (C, F) sculpture of
Trichocathaica
species
A-C
Trichocathaica rugosobasis
(
Pilsbry 1934
), ANSP 159636 (holotype, D = 15 mm)
D-F
Trichocathaica puteolata
Pall-Gergely
sp. n., holotype (SMF 24666, D = 19.5 mm). Scale bars: Upper scale (A, D); lower scale (B, C, E, F). Photos: B.
Pall-Gergely
(
D-F
) and K. Seizova, ANSP Malacology Department (
A-C
).
Measurements (in mm).
D = 15.7-22.8, H = 7.5-11.4 (n = 6).
Differential diagnosis.
The shell of
T. rugosobasis
is similar to that of
T. puteolata
sp. n. but smaller with the narrower umbilicus, less keeled body whorl, and stronger radial sculpture.
Etymology.
The Latin
puteolata
(= pitted) refers to the pitted surface of the shells.
Distribution.
This species is known only from the valley of the Dadu River.
Remarks.
All shells we examined in the SMF were labelled as
T. lyonsae
.