Pollicaria myersii
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Ordo: Architaenioglossa
Familia: Pupinidae
Genus: Pollicaria
Name
Pollicaria myersii (Haines, 1855) – Wikispecies link – Pensoft Profile
- Cyclostoma (Megalostoma) myersii Haines, 1855: 157, pl. 5, fig. 9–11. Type locality: Siam.
- Megalostoma myersi—Pfeiffer, 1856a: 67, pl. 19, figs 1, 2.
- Megalostoma (Hainesia) myersi—Pfeiffer, 1856b: 120.
- Megalostoma myersii—von Martens, 1860: 11.
- Pollicaria myersi—von Martens, 1867: 67. Sowerby, 1878: Pupinidae, pl. 8, species 69. Kobelt, 1902: 290.
- Hybocystis myersi—Crosse, 1885: 191–193, pl. 11, fig. 4.
- Pollicaria myersii—Habe, 1964: 114, pl. 2, fig. 13. Pain, 1974: 175, 176, pl. 6, figs 2, 5.
Material examined
Siam: NHMUK 20090242 (Fig. 4F). Pahom, Vang Vieng, Laos: CUMZ 1531, 1572 (Fig. 4G), 1591; ZMMSU 0009.
Description
Shell: Shell large, reddish brown to light orange. Periostracum thin, corneous; shell surface usually with fine malleations on upper half of last whorl. Aperture almost circular with a shallow posterior angled groove. Peristome yellow, parietal declining shoulder absent. Lip thickened, broadly expanded, reflexed, with concentric margin.
Radula: Radular teeth arranged in v-shaped rows, each transverse row with 7 teeth (2-1-1-1-2). Central tooth with well developed central cusp and one smaller lateral cusp on each side; central cusp large, elongate with pointed tip. Lateral teeth with 2 cusps, outer cusp largest and elongate shape with pointed tip, and with relatively small pointed tip of inner lateral cusps. Inner and outer marginal teeth with 2 cusps; central cusp large, flanked by small inner lateral cusps.
Distribution:
The type locality of this species was given as the broad location of “Siam” (see Haines 1855[1]). Subsequently, Pollicaria mouhoti was synonymised with Pollicaria myersii (von Martens 1867[2], Pain 1974[3]) thus expanding the distribution of Pollicaria myersii beyond its historical range. However, in this study the distribution of the species is restricted to limestone areas of Vientiane to Luang Prabang, Laos, and probably the northern part of Thailand.
Remarks:
The syntype AMNH 43629 could not be traced (Siddal and Watson, personal communication). Due to the proximity of the geographic distributions and similarity in shell morphology of the two species, Pollicaria mouhoti have long been considered a junior synonym of Pollicaria myersii (see Pain 1974[3]). However, Pollicaria myersii can be distinguished from Pollicaria mouhoti by an elongated purple to pale orange shell with thin periostracum, rounded aperture and very fine wrinkles on the dorsal part of the last whorl (Table 1, Fig. 4F, K). Pollicaria myersii differs from Pollicaria gravida, Pollicaria rochebruni and Pollicaria crossei by having a larger shell, no apertural groove and noticeable wrinkles on last whorl (Tables 1, 2).
Taxon Treatment
- Kongim, B; Sutcharit, C; Naggs, F; Panha, S; 2013: Taxonomic revision of the Elephant Pupinid snail genus Pollicaria Gould, 1856 (Prosobranchia, Pupinidae) ZooKeys, 287: 19-40. doi
Other References
- ↑ Haines W (1855) Descriptions of four new species of terrestrial shells from Siam. Annals of the Lyceum of Natural History of New York 6: 157-158. doi: 10.1111/j.1749-6632.1858.tb00358.x
- ↑ von Martens E (1867) Die preussische Expedition nach Ost-Asien. Zoologischer Theil, zweiter Band. Verlag der Königlichen Geheimen Ober-Hofbuchdruckerei, 477 pp.
- ↑ 3.0 3.1 Pain T (1974) The land operculate genus Pollicaria Gould (Gastropoda), a systematic revision. Journal of Conchology 28: 173-178.
Images
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![Figure 4. Shell morphology of Pollicaria spp. A–E Pollicaria gravida A lectotype UMZC I.102935.A B paralectotype UMZC I.102935.B-E C syntype of Otopoma blennus Benson, 1856 UMZC I.102930.A and D, E specimens from Farm Caves, Moulmein, Burma (NHMUK 88.124.863.4–5; specimen with ‘x’ was figured in Gude (1921)[1], fig. 29) F, G Pollicaria myersii F form Siam (NHMUK 20090242; specimen figured in Pfeiffer, 1856a, pl. 19, figs 1, 2), and G specimen from Pahom, Vang Vieng, Laos (CUMZ 1572) H, I Pollicaria mouhoti mouhoti H lectotype (NHMUK 20130071/1), and I specimen from Tam Wungdang, Phitsanulok (CUMZ 1533) J, K Pollicaria mouhoti monochroma ssp. n. from the type locality, J holotype CUMZ 1577, and K paratype CUMZ 1548.](/wiki/File:ZooKeys-287-019-g004.jpg)
- ↑ Gude G (1921) Mollusca III, Land Operculates (Cyclophoridae, Truncatellidae, Assimineidae, Helicinidae).In: Shipley AE (Ed) The fauna of British India including Ceylon and Burma, 386 pp.
