Ampullaria perakensis, Morgan, 1885

Cowie, Robert H. & Héros, Virginie, 2012, Annotated catalogue of the types of Ampullariidae (Mollusca, Gastropoda) in the Muséum national d’Histoire naturelle, Paris, with lectotype designations, Zoosystema 34 (4), pp. 793-824 : 812

perakensis Morgan, 1885 , Ampullaria

( Fig. 5G )

Ampullaria perakensis Morgan, 1885: 418 , pl. 8, fig. 12a-d.

CURRENT TAXONOMIC STATUS. — Pila . Valid species.

TYPE SPECIMEN. — Lectotype (here designated) MNHN 4511 .

TYPE LOCALITY. — “le royaume de Pérak ” [Perak, Peninsular Malaysia].

REMARKS

The label indicates that this shell is from Morgan’s collection; the shell matches the dimensions given in the description; and it is clearly the specimen illustrated. On this basis we designate it as the lectotype to stabilise the name.

peristomata d’Orbigny, 1835 , Ampullaria ( Fig. 5H ) Ampullaria peristomata d’Orbigny, 1835a: 32 , 33 [1838: pl. 52, figs 4-6; 1841: 378].

CURRENT TAXONOMIC STATUS. — Pomacea (Pomacea) . Valid species.

TYPE SPECIMENS. — Syntypes MNHN 4509 (4 spms), 4510 (2 spms).

TYPE LOCALITY. — “Guarayos (republica Boliviana)”.

REMARKS

Cowie& Thiengo (2003:72) incorrectly cited page 33 as the first page of the description. The two lots may be two different but similar species. Furthermore, they are both clearly different from the NHMUK syntypes of this species, which have a narrow umbilicus and shell height greater than shell width. None of these MNHN shells corresponds closely to the original description (d’Orbigny 1835a: 32, 33), in particular regarding the width of the umbilicus (original description: “sub-imperforata”) and in the ratio of shell height to width (original description: “Long. 40 millim., lat. 38 millim.”) ; all have a wide umbilicus, those in MNHN 4509 having shell width greater than shell height,while those in MNHN 4510 are approximately equi-dimensional. The features noted in the original description are reiterated in the later description (d’Orbigny 1841: 378) and are clear in the later illustrations (d’Orbigny 1838: pl. 52). None of the shells matches the illustrations. The specimens in MNHN 4509 (more depressed, larger shells) are extremely similar to the larger of the syntypes ( MNHN 4523 ) of Ampullaria zonata d’Orbigny, 1835 , although again these do not closely match the original description. Correct taxonomic assignment of these syntypes and possible designation of a lectotype must await further research .

Figures

FIG. 5. — A, Lanistes neritoides Brown & Berthold, 1990, holotype MNHN 4515, 12.9 mm; B, Ampullaria neritoides d’Orbigny, 1835, probable syntype MNHN 4519, 97.2 mm; C, Afropomus balanoideus nimbae Binder, 1963, lectotype MNHN 4497, 18.8 mm; D, Ampullaria occlusa Crosse & Fischer in Fischer & Crosse, 1888, holotype MNHN 4514, 49.6 mm; E, Ampullaria ovata Olivier, 1804, syntype MNHN 4513, 64.3 mm; F, Ampullaria oviformis Deshayes, 1830, syntype MNHN 4512, 43.4 mm; G, Ampullaria perakensis Morgan,1885,lectotype MNHN 4511, 33.6 mm; H, Ampullaria peristomata d’Orbigny,1835,syntype MNHN 4509, 38.7 mm; I, Ampullaria pesmei Morlet, 1889, lectotype MNHN 4508, 30.2 mm.