Plekocheilus (Eurytus) nocturnus Pilsbry, 1939

Borrero, Francisco J. & Breure, Abraham S. H., 2011, The Amphibulimidae (Mollusca: Gastropoda: Orthalicoidea) from Colombia and adjacent areas, Zootaxa 3054, pp. 1-59 : 30

Plekocheilus (Eurytus) nocturnus Pilsbry, 1939

( Figs 16 A–F)

Plekocheilus nocturnus Pilsbry 1939: 3 , fig. 5. Type locality: Ecuador, Puyo. Lectotype ANSP 170695 ( Baker 1963); Richardson 1995: 317 (references).

Material. Ecuador, Imbabura, Ibarra: DMNH 141641; Napo, Topo: DMNH 76773, DMNH 129338, DMNH 151003); “Napo:” DMNH 141674; Pastaza, Mera: DMNH 141650; Puyo: ANSP, DMNH 141683;?, “ Ecuador:” USNM 532634 (ex Fulton, as P. semipictus ); “El Oriente,” leg./1937: USNM 628796 (as P. tricolor semipictus ).

Remarks. Although the name P. semipictus has been used for this taxon, this is a clearly distinct species. The upper part of the last whorl is very globose, the lower part is more constricted, thus giving a “humpback” impression.

Figures

FIGURE 16. Plekocheilus (Eurytus). A – F. P. (E.) nocturnus Pilsbry, 1939. A – C. Lectotype ANSP 170695 (H 51 mm). D – F. Lectotype of “ taylorianus Reeve, ” ZMB 122722 (H 47 mm). G – M. P. (E.) pulicarius (Reeve, 1848). G – I. Lectotype BMNH 1975281, photo P. Crabb. J – M. Paratypes of virgatus Pilsbry, 1935, ANSP 424989 (H 35, 36 mm). N – R. P. (E.) tetensii (Dunker, 1875). N – P. ZMB 39266 (H 38.9 resp. 63.2 mm), photo L. Matias. Q – R. USNM 488807 (H 52 mm).