Morphological characters of immature stages of Palaearctic species of Cleopomiarus and Miarus and their systematic value in Mecinini (Coleoptera, Curculionidae, Curculioninae)

By

Skuhrovec, Jiří
Gosik, Rafał
Caldara, Roberto
Toševski, Ivo
Łętowski, Jacek 1950-
Szwaj, Ewelina

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

808

Pages

23-92

Subjects

Biology , Cleopomiarus , Distribution , Mature larva , Mecinini , Miarus , Morphology , Pupa

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.808.28172

 

Abstract

The relationship between the generaCleopomiarusandMiarusof Mecinini (Curculionidae, Curculioninae) was tested on the basis of morphological characters from the immature stages. The mature larvae of fiveCleopomiarusspecies (C.distinctus(Boheman, 1845),C.graminis(Gyllenhal, 1813),C.longirostris(Gyllenhal, 1838),C.medius(Desbrochers des Loges, 1893), andC.meridionalis(H. Brisout de Barneville, 1863)), threeMiarusspecies (M.abnormisSolari, 1947,M.ajugae(Herbst, 1795), andM.campanulae(Linnaeus, 1767)), and the pupae of fourCleopomiarusspecies (C.distinctus,C.graminis,C.longirostris, andC.medius) and twoMiarusspecies (M.abnormisandM.ajugae) are described in detail for the first time. To confirm the taxonomic identification of some larvae, DNA COI barcode was obtained and compared with those of adults. The immature stages of the species herein studied were compared with those known from other genera in tribe Mecinini. It is suggested thatMiarusandCleopomiarusmay be monophyletic based on several shared distinctive characters. Larvae ofMiarushave a characteristic maxillary mala with six finger-likedmsof two sizes (one or twodmsvery long and the rest of medium length), this feature being apparently unique among weevils. Other genus-specific character states are observed in the pupae, such as the length of setae on the head, rostrum and pronotum, including the number ofrson the rostrum,dson pronotum, and finally the shape of the urogomphi. A key to the described larvae and pupae were respectively presented. New biological and distributional data on some species are reported.