Pollicaria myersii (Haines, 1855)
|
publication ID |
https://dx.doi.org/10.3897/zookeys.287.4617 |
|
persistent identifier |
https://treatment.plazi.org/id/8AEB8549-F4AE-4560-FFF2-6AD811F200B1 |
|
treatment provided by |
|
|
scientific name |
Pollicaria myersii (Haines, 1855) |
| status |
|
Pollicaria myersii (Haines, 1855) Figs 2A View Figure 2 4F, G View Figure 4 6A View Figure 6 Tables 1 View Table 1 2 View Table 2
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 View Figure 4 ). Pahom, Vang Vieng, Laos: CUMZ 1531, 1572 ( Fig. 4G View Figure 4 ), 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). Subsequently, Pollicaria mouhoti was synonymised with Pollicaria myersii ( von Martens 1867, Pain 1974) 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). 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 View Table 1 , Fig. 4F, K View Figure 4 ). 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 View Table 1 , 2 View Table 2 ).
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 |
|
|
Phylum |
|
|
Class |
|
|
Order |
|
|
Family |
|
|
Genus |
Pollicaria myersii (Haines, 1855)
| Kongim, Bangon, Sutcharit, Chirasak, Naggs, Fred & Panha, Somsak 2013 |
Cyclostoma (Megalostoma) myersii
| Haines 1855 |