Bulimulus (Drymaeus) chacoensis Preston, 1907

Breure, Abraham S. H., 2011, Annotated type catalogue of the Orthalicoidea (Mollusca, Gastropoda) in the Royal Belgian Institute of Sciences, Brussels, with descriptions of two new species, ZooKeys 101, pp. 1-50 : 11

Bulimulus (Drymaeus) chacoensis Preston, 1907 Figs 10E, 10iii

Bulimulus (Drymaeus) chacoensis Preston 1907: 491, fig. 5.

Bostryx chacoensis (Preston); Köhler 2007: 132, fig. 23.

Type locality.

"To the north of the Rio Pilcomayo, Chaco, Bolivia".

Label.

"N of riv. Pilcomayo / Chaco Bolivie 600 m / alt. (co-type)"; label in Dautzenberg’s handwriting, see remarks.

Dimensions.

"Alt. 30, diam. maj. 9.5 mm"; figured specimen H 30.1, D 10.1, W 8.1.

Type material.

RBINS/MT2343, one syntype, ex Preston (Dautzenberg coll.).

Remarks.

The specimen is not accompanied by an original Preston label. As Dautzenberg always accurately documented on his labels the source and date of his acquisition (in this case "Preston 14.xi.07"), there is hardly any doubt that this is an original type specimen. The protoconch is smooth, confirming that this taxon should be classified within Bostryx (cf. Breure 1979: 52).

Current systematic position.

Bulimulidae , Bostryx chacoensis (Preston, 1907).