Two new species of the family Rhynchitidae (Coleoptera: Curculionoidea) from Eocene Baltic amber, with key to species and assumed trophic relationships

doi:10.5194/fr-24-117-2021

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Two new species of the family Rhynchitidae (Coleoptera: Curculionoidea) from Eocene Baltic amber, with key to species and assumed trophic relationships	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.5194/fr-24-117-2021

Title: Two new species of the family Rhynchitidae (Coleoptera: Curculionoidea) from Eocene Baltic amber, with key to species and assumed trophic relationships
Creator: Bukejs, Andris
|
Legalov, Andrei A.
Date: 2021
DOI: 10.5194/fr-24-117-2021
Description: Two new fossil species of Baltocar Kuschel, 1992 and Pseudomesauletes Legalov, 2001 (Curculionoidea: Rhynchitidae) are described from Eocene Baltic amber. Baltocar sontagae sp. nov. is similar to B. groehni Riedel, 2012 but differs in the shorter rostrum, tarsomere 1 shorter than tarsomere 5 and 1.4× as long as tarsomere 2, longer elytra, and shorter body. Pseudomesauletes lobanovi sp. nov. is similar to P. culex (Scudder, 1893) and P. ibis (Wickham, 1912): the new species differs from P. culex in the larger eyes, longer pronotum, being 0.44× shorter than elytra, and slightly smaller body size; from P. ibis it differs in the smaller body size, rostrum shorter than elytra, and weakly convex pronotum. This is the first record of Pseudomesauletes from Baltic amber and the sixth species of Baltocar. Keys to species of the genus Baltocar and to the Eocene species of the genus Pseudomesauletes are given. Assumed trophic relationships of these fossil taxa are discussed (urn:lsid:zoobank.org:pub:260EBE6E-DA6C-4D6DA1D2-2C258224622F). parts of the plant, usually gnawed by the female (Legalov, 2004). Thirty-five species were found in the fossil record (Legalov, 2015b; Bukejs and Legalov, 2019; Kania and Legalov, 2019). The earliest Rhynchitidae are known from the Cenomanian of Botswana and the Turonian New Jersey amber (Gratshev and Zherikhin, 2000; Legalov, 2015b). They are found in the Paleocene of France (Legalov, 2020b), the Eocene of the USA and Europe (Legalov, 2015b, 2020b), the Oligocene of Europe (Legalov, 2020b), the Miocene of Germany (Heer, 1847), and also Dominican and Mexican amber (Poinar and Brown, 2007; Poinar and Legalov, 2015). Nine rhynchitid species are described from Eocene Baltic amber (Voss, 1953; Legalov, 2012, 2013, 2015b, 2020a, b; Riedel et al., 2012; Kania and Legalov, 2019). The extinct genus Baltocar Kuschel, 1992 includes five species (Riedel et al., 2012; Legalov, 2015b, 2020a). A new species of this genus is discovered in examined Baltic amber material. The fossil species of the genus Pseudomesauletes Legalov, 2001 were known from Rovno amber (Bukejs and Legalov, 2019) and Florissant (Legalov, 2015b). A newly described species is the first record of this genus from the Baltic amber.