Darwin Returns to the Galapagos: Genetic and Morphological Analyses Confirm the Presence of Tramea darwini at the Archipelago (Odonata, Libellulidae)

Insects

RosserW. Garrison¹  MaríaOlalla Lorenzo-Carballa²  Adolfo Cordero-Rivera²  AndreaC. Encalada³ 

[1] California Department of Food & Agriculture, 3294 Meadowview Road, Sacramento, CA 95832-1448, USA;ECOEVO Lab, E.E. Forestal, Campus Universitario A Xunqueira s/n, University of Vigo, 36005 Pontevedra, Spain;Laboratorio de Ecología Acuática, Instituto BIOSFERA, Diego de Robles y Vía Interoceánica, Campus Cumbayá, Universidad San Francisco de Quito, 1712841 Quito, Ecuador;

关键词: dragonflies;    taxonomy;    islands;    molecular markers;    morphological analysis;    synonymy;   

DOI  :  10.3390/insects12010021

来源: DOAJ

【 摘 要 】

The status of the Tramea species present in the Galapagos Islands (Odonata, Libellulidae) has been the subject of a long-standing debate among odonatologists. Here, we use molecular and morphological data to analyze a series of specimens from this genus collected in 2018 from the Islands of San Cristobal, Isabela, and Santa Cruz, with the aim of determining their relationship with Tramea calverti Muttkowski and with their currently considered senior synonym T. cophysa Hagen. We combined sequencing of mitochondrial and nuclear DNA with morphological examination of several specimens of Tramea, including representatives of continental T. cophysa and T. calverti. Our molecular analyses place the Tramea from Galapagos in the same clade as T. calverti, with T. cophysa as a closely related species. The morphological analyses found only one consistent difference between T. cophysa and T. calverti: the presence of an accessory lobe in the male vesica spermalis of T. cophysa that is absent in T. calverti and in the Tramea from Galapagos. In agreement with our genetic results, the overall morphological differences documented by us indicate that the Galapagos material examined is conspecific with T. calverti. In light of this, and following the principle of priority in taxonomic nomenclature, Tramea calverti Muttkowski, 1910 should hereafter be considered a junior synonym of Tramea darwini Kirby, 1889.

【 授权许可】

Unknown