Bulimulus (Drymaeus) abruptus Rolle, 1904

Breure, Abraham S. H. & Ablett, Jonathan D., 2014, Annotated type catalogue of the Bulimulidae (Mollusca, Gastropoda, Orthalicoidea) in the Natural History Museum, London, ZooKeys 392, pp. 1-367 : 6-7

Bulimulus (Drymaeus) abruptus Rolle, 1904 Figs 26J-L , L1i

Bulimulus (Drymaeus) abruptus Rolle 1904: 35.

Type locality.

"Huancabamba in Peru"; see remarks.

Label.

"Huancabamba,/ Peru 1904"; in Rolle’s handwriting. Another label in pencil indicating that it came from the Fulton collection.

Dimensions.

"Alt. 44, diam. max. 24 (..) mm"; figured specimen herein H 42.5, D 21.5 W 6.3.

Type material.

NHMUK 1947.2.10.1, syntype (ex Rolle).

Remarks.

Rolle did not state on how many specimens his description was based upon. However, the shell height is close to the original measurements and together with the indication ”type” on the label in Rolle’s handwriting, there is no doubt about the status of the specimen. The locality is ambiguous, as there are several places called ”Huancabamba” in Peru. There were, however, several other species described from the same locality, amoung them Columbinia huancabambensis , which is regarded by Loosjes and Loosjes-van Bemmel (1984: 33), as occurring in northern Peru. Another species described in the same paper, Systrophia moellendorffii , was said by Haas (1955: 367) to have been rediscovered in the Chanchamayo valley [Dept. Pasco]. Given the fact that a third species described by Rolle- Newboldius illustris -is known to occur in the same region, makes it likely that Huancabamba in Dept. Pasco is the locality where Rolle’s taxon occurs. This species was hitherto considered as published in 1905 ( Richardson 1995: 95); however, on the copy in the Smithsonian Institution Libraries the title page of the issue in which Rolle’s paper appeared is marked ”Rec’d Mar. 2/04" (see http://www.biodiversitylibrary.org/item/53294#page/211/mode/1up); p. 48 of this issue mentions "Ausgegeben 22. Februar".

Current systematic position.

Bulimulidae , Drymaeus (Drymaeus) abruptus (Rolle, 1904).

Figures

Figure 26. Drymaeus species. A-C Drymaeus (Drymaeus) abscissus (Pfeiffer, 1855), lectotype NHMUK 1975497 (H = 27.8) D-F Drymaeus (Drymaeus) fallax (Pfeiffer, 1853), lectotype NHMUK 1969142 (H = 22.4) G-I Drymaeus (Drymaeus) bourcieri (Pfeiffer, 1853), lectotype NHMUK 1975446 (H = 23.9) J-L Drymaeus (Drymaeus) abruptus (Rolle, 1904), syntype NHMUK 1947.2.10.1 (H = 42.5). All enlarged.

Figure L 1. Labels. i Bulimulus (Drymaeus) abruptus Rolle, 1904 ii Bulimus abscissus Pfeiffer, 1855 iii Helix abyssorum d'Orbigny, 1835 iv Bulimus acalles Pfeiffer, 1853 v Bulimus acervatus Pfeiffer, 1857.