Taxonomy of the Cape Verde endemic weevil genus Dinas (Coleoptera: Curculionidae: Entiminae). Part I: Description of a new subgenus, and two new species from S?o Nicolau Island
Skuhrovec Jiří, Batelka Jan
Acta Entomologica Musei Nationalis Pragae 54(1): 315-336, 2014
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Abstract: An extensive material of the Cape Verde endemic weevil genus Dinas Wollaston,
1867 (Curculionidae: Entiminae) is revised. Two subgenera are recognized based
on the external morphology and biology of adults. Microspina subgen. nov. is
established for the group with smaller-sized adults which are flower-eaters
adapted to habitats with Macaronesian endemic flora; 10 species are transferred
to the subgenus: D. (M.) angusticeps Roudier, 1957, D. (M.) angustula Wollaston,
1867, D. (M.) elliptipennis Wollaston, 1867, D. (M.) heckeli Geisthardt, 1995,
D. (M.) micans Roudier, 1957, D. (M.) obsita Wollaston, 1867, D. (M.) pallipes
Roudier, 1957, D. (M.) punctipennis Roudier, 1957, D. (M.) sitonaeformis
Wollaston, 1867, and D. (M.) viridisquamea Roudier, 1957. Contrary, adults of
Dinas s. str. were found on the ground and under stones only. The Dinas fauna of
S?o Nicolau Island is studied in detail. Dinas (Microspina) afonsoi sp. nov.
and D. (Dinas) strakai sp. nov. are described from the eastern part of the
island. The types and new material of the remaining two species from the western
part of the island, D. (Microspina) angusticeps and D. (Microspina)
sitonaeformis, are reviewed, and lectotype for the latter is designated. An
identification key to all species known from S?o Nicolau is provided. The
origin of Dinas and its biogeographic affinities are discussed. Distributional
pattern of the genus within the archipelago, particularly in S?o Nicolau are
commented. An updated list of all known Dinas species is provided.
Key words: Coleoptera; Curculionidae; Entiminae; Dinas; new subgenus; new species; new combination; check-list; adaptive radiation; insularity; Macaronesia; Cape Verde Islands