Torneuma robustum (DIECK, 1869)

Stüben, Peter E., Schütte, André, López, Heriberto & Astrin, Jonas J., 2016, Molecular and morphological systematics of soil-inhabiting Cryptorhynchinae of the genus Acallorneuma and the tribe Torneumatini (Coleoptera: Curculionidae), with description of two new species, Beiträge Zur Entomologie = Contributions to Entomology 66 (2), pp. 169-199 : 189

Key to the species of the Torneuma robustum group with a simply V -shaped endophallus

Note: This group contains in the broadest sense almost a dozen additional species with a more complex and larger structure of the endophallus (see Fig. ‘Tab.Tor.6.1’ and the pictoral keys in STÜBEN 2007, and Fig. ‘Trob’ in STÜBEN 2009).

1. Elytra broad: <1.65x as long as wide; lateral margins of the prosternal pectoral canal semicircularly rounded. ...... 2

1*. Elytra more slender:> 1.72x as long as wide; lateral margins of the prosternal pectoral canal nearly straight or weakly S-shaped. ................................................................................................................................................................. 3

2. Habitus broad; premucro small, more inconspicuous, Morocco ( Tanger. Body length: 2.40–2.60 mm. ................... .................................................................................................................................... Torneuma robustum (DIECK 1869) = Crypharis tingitana DIECK 1869 = Crypharis strigirostris FAIRMAIRE 1873

2*. Habitus slightly more slender; premucro large; Morocco ( Tanger). Body length: 2.60 mm. ....................................... ........................................................................................................... Torneuma robustum var. tingitanum (DIECK 1869) infrasubspecific name (ICZN: 2000: 45.5)

3. Punctures of the very narrow elytral striae: on the two first elytral striae from base until center of elytra with at least 12 very fine, deeply penetrated (often a little oblong) punctures; pronotum densely punctured. Italy: island of Lampedusa. Body length: 2.50–2.90 mm. ..................... Torneuma exstinguendum MAGNANO & MIFSUD 2001

3*. Punctures of the wider elytral striae: from the base until the middle of elytra with at most 10 strong punctures or puncture cavities; pronotum spaciously punctured. ....................................................................................................... 4

4. Pronotum barely longer than broad, more or less square-shaped; elytra cylindrical. Spain (Alicante). Body length: 2.35 mm. ............................................................................................................ Torneuma morandae HOFFMANN 1958

4*. Pronotum 1.16x as long as wide; from the center towards the fore-margin laterally narrowing rectilinearly; elytra much flatter and broader. Spain (Cadiz). Body length: 3.25 mm. ........... Torneuma cadizensis STÜBEN spec. nov.