Dinas (Microspina) angusticeps Roudier, 1957

Skuhrovec, JiĜí & Batelka, Jan, 2014, Taxonomy of the Cape Verde endemic weevil genus Dinas (Coleoptera: Curculionidae: Entiminae). Part I: Description of a new subgenus, and two new species from São Nicolau Island, Acta Entomologica Musei Nationalis Pragae 54 (1), pp. 315-336 : 325-326

Dinas (Microspina) angusticeps Roudier, 1957

( Fig. 3D )

Type locality. Cape Verde Isl., W of São Nicolau, Mte Gordo.

Type material examined. HOLOTYPE: 3, ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Lindberg // 33 // TYPE // Dinas / angusticeps n. sp. / Harald Lindb. det. // C12 6634’ ( FMNH) . PARATYPES: 3 ♀♀ ( FMNH), ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Lindberg // TYPE // C12 6635-7 ’; 6 spec. ( FMNH), ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Lindberg // PARATYPE // http://id.luomus.¿/ / HT.2040, 2042 / Dinas / angusticeps x / Roudier, 1957 / unknown det. // C13 501-502’; 3 spec. ( FMNH), ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Panelius // PARATYPE // http://id.luomus.¿/ / HT. 2041 / Dinas / angusticeps x / Roudier, 1957 / unknown det. // C13 503’.

Additional material examined. 136 spec. ( FMNH), ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Lindberg // http://id.luomus.¿/ / HT.2060-2108 / Dinas / angusticeps x / Roudier,1957 / unknown det.// C13 437-485’; 34 spec. ( FMNH), ‘Ins. Cabo Verde / Nicolau Mte Gordo / 9, 15.12.1953 / Panelius // http://id.luomus.¿/ / HT. 2140-2142 / Dinas / angusticeps x / Roudier, 1957 / unknown det. // C13 486-496, 504’. Specimens are provided with one printed label: ‘ DINAS (MICROSPINA) / ANGUSTICEPS / Roudier, 1957 / JiĜí Skuhrovec & / Jan Batelka det. 2013’.

Differential diagnosis. Dinas angusticeps has narrow elongate elytra in male, and much wider and more oval elytra in female; rostrum is distinctly narrowed in the middle ( Fig. 2A ) (in contrast to Microspina species from the Southern Chain, see Table 2). Dinas angusticeps has more stout, apically widened and flattened, long erect setae on the whole elytra ( Fig. 3D ), than D. afonsoi sp. nov., which has stout, apically pointed, not flattened, long setae in apical third of elytra only ( Fig. 3B ) and to D. obsita which has only a few stout long erect setae on the whole elytra ( D. sitonaeformis and D. pallipes lack erect setae ( Fig. 3C )). Rostrum wide (the narrowest part) as its length (ratio 1: 1) (in contrast to D. angustula – rostrum slightly wider than its length (ratio 1: 0.83).

Bionomics. No data on biology are available for this species.

Distribution. Cape Verde Islands – São Nicolau (western part); only the type series is known for this species.

Figures

Fig. 3. Dinas (Microspina) afonsoi sp. nov., holotype, male (A–B, E–F), female (G–I): A – habitus, dorsal view; B – elytra, lateral view; C – elytra of Dinas (Microspina) sitonaeformis Wollaston, 1867, lateral view; D – elytra of Dinas (Microspina) angusticeps Roudier, 1957, lateral view; E – aedeagus, dorsal and lateral view; F – spiculum gastrale; G – female sternite VIII; H – ovipositor; I – spermatheca. Scales: 1 mm, scale with ‘*’=2 mm, scale with ‘**’=0.5 mm.

Fig. 2. Differential diagnosis of the subgenera of Dinas: Dinas (Microspina) afonsoi sp. nov.:A – head, dorsal view; C – pronotum; G – elytra, dorsal view; Dinas (Microspina) sitonaeformis Wollaston, 1867: E – spina on profemora; Dinas (s. str.) strakai sp. nov.: B – variability of rostrum of Dinas (s. str.) strakai sp. nov., dorsal view; D – pronotum; F – spina on profemora; H – elytra, male, dorsal view.