Otiorhynchus Germar, 1822

Christoph Germann, Sofia Wyler & Marco Valerio Bernasconi, 2017, DNA barcoding of selected alpine beetles with focus on Curculionoidea (Coleoptera), Revue suisse de Zoologie 124 (1), pp. 15-38: 23

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http://doi.org/ 10.5281/zenodo.322661

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scientific name

Otiorhynchus Germar, 1822


Genus Otiorhynchus Germar, 1822 

Subgenera Metopiorrhynchus Reitter, 1912  pars,

Nihus Reitter, 1912  , Eunihus Reitter, 1912 

A large number of the specimens coped with this study belongs to the genus Otiorhynchus  (annex 1, Fig. 1View Fig. 1, Supp. 1). This genus is one of the most specious genera – if not the most specious – in weevils. More than 1500 species are presently assigned to this genus and the systematics is midly expressed rather chaotic. Based on our data, the monophyly of Otiorhynchus  is supported by insufficient bootstrap values in both the NJ and ML analyses. However, some new insights into alpine subgenera could be gained even if the overall relationships among all the proposed subgenera within this large genus are not always strongly supported in our analyses based on a relatively short fragment of the COI gene.

It was Yunakov (2006) who proposed subgenus Metopiorrhynchus  as synonym to Nihus Reitter, 1912  , which was reinstated by Magnano & Alonso-Zarazaga (2013). [The type species of Metopiorrhynchus  is O. singularis (Linné, 1767) – included in our samples, and O. carinatopunctatus in Nihus  , a sample that remained negative] We here provide support to the former synonymy, where species of Nihus  cluster together within the subgenus Metopiorrhynchus  . Interestingly, the only representative ( O. grischunensis Germann, 2010  ) of Eunihus  , a subgenus which has temporarily been placed in synonymy with Nihus  , but is actually accepted as proper subgenus ( Magnano & Alonso-Zarazaga, 2013), does not cluster together with Nihus  . Even if the position of Eunihus  remains unclear since not supported by enough bootstrap values, our result underlines its self-standing position in relation to the typical Nihus  representatives. On the other side, the Corsican endemic species (O. corsicus Fairmaire, 1859) at present assigned to the subgenus Phalantorrhynchus Reitter, 1912  results in the clade Metopiorrhynchus  + Nihus  (bootstrap support ML: 58; NJ: 61).

Schütte et al. (2013) and Stüben et al. (2015) already provided molecular evidence to a common clade of Nihus  + Metopiorrhynchus  + Aranihus Reitter, 1912  [represented by the species O. parvicollis Gyllenhal, 1834 and O. ligneus (Olivier, 1807)] + Edelengus Reitter, 1912  (O. atlasicus Escalera, 1914; O. allardi Stierlin, 1872  ).