Bulimulus (Drymaus) interruptus Preston, 1909

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 : 76

Bulimulus (Drymaus) interruptus Preston, 1909 Figs 18A-B , L29iii

Bulimulus (Drymaeus) interruptus Preston 1909: 511, fig. 1; Breure 1979: 120.

Drymaeus (Mesembrinus) interruptus ; Köhler 2007: 151, fig. 119.

Type locality.

"Merida, Venezuela".

Label.

"Merida, Venezuela".

Dimensions.

"Alt. 25.5, diam. maj. 10.5 mm"; figured specimen herein H 24.5, D 11.3, W 6.3.

Type material.

NHMUK 1914.4.3.38, lectotype and five paralectotypes (ex Preston).

Remarks.

Preston described for this taxon also two forms (interruptus form α and β), and three varieties (var. pallidus, var. pallidus form γ, and var. pallidu s form δ); as he gave them explicitly infrasubspecific rank these names are not available (Art. 45.6 ICZN). The shells, from the same locality, clearly show the intraspecific variation that may occur in this taxon. Köhler (2007) has interpreted the reference to "HT BMNH 1914.4.3.38" in Breure (1979: 120) as an unjustified designation since Preston evidently did base his description on more than one specimen. However, under Art. 74.6 ICZN the reference of Breure (1979) may be considered as a lectotype designation; specimen ZMB 59597 is therefore a paralectotype.

Current systematic position.

Bulimulidae , Drymaeus (Mesembrinus) interruptus (Preston, 1909).

Figures

Figure 18. Drymaeus species. A-B Drymaeus (Mesembrinus) interruptus (Preston, 1909), lectotype NHMUK 1914.4.3.38 (H = 24.5) C-D Drymaeus (Mesembrinus) granadensis (Pfeiffer, 1848), lectotype of Bulimus lividus (Reeve, 1850), lectotype NHMUK 1975208 (H = 24.5) E Drymaeus (Mesembrinus) laetus (Reeve, 1849), lectotype NHMUK 1975534 (H = 26.6) F-G Drymaeus (Mesembrinus) jonasi (Pfeiffer in Philippi 1846), syntype NHMUK 1975557 (H = 26.6) H-I Drymaeus (Mesembrinus) studeri (Pfeiffer, 1847), lectotype of Bulimus primula (Reeve, 1848) NHMUK 1975478 (H = 25.0) J Drymaeus (Mesembrinus) prestoni da Costa, 1906, lectotype NHMUK 1907.11.21.12 (H = 21.3) K-L Drymaeus (Mesembrinus) muliebris (Reeve, 1849), lectotype NHMUK 1879.2.26.251 (H = 29.9) M-N Drymaeus (Mesembrinus) roseatus (Reeve, 1848), lectotype NHMUK 1975309 (H = 35.6) O-P Drymaeus (Mesembrinus) studeri (Pfeiffer, 1847), lectotype NHMUK 1975480 (H = 25.6) Q Drymaeus (Mesembrinus) translucens panamensis (Broderip in Broderip and Sowerby I 1832), possible syntype NHMUK 20100614 (H = 18.2) R Drymaeus (Mesembrinus) translucens translucens (Broderip in Broderip and Sowerby I 1832), lectotype NHMUK 20100634 (H = 21.2). All enlarged.

Figure L 29. Labels. i Bulimus incrassatus Pfeiffer, 1853 ii Bulimulus (Drymaeus) interruptus Preston, 1909.