Abstract
Based on two males from Ecuador (Sucumbíos Province), Paracordulia calcarulata sp. nov. is the second described species of the genus. This new species is compared to P. sericea (Selys, 1871). The different shape of the anal appendages easily allows separation of the two. Generic diagnosis based on adults and larvae is amended. Paracordulia Martin, 1907 is a poorly known genus of the Amazonian biome, and its apparent rarity or absence of records is probably due to its secretive habits; considering the different forms of known females, its specific diversity has likely been significantly underestimated. Some structures of the vesica spermalis are briefly discussed.
References
Bechly, G. (1996) Morphologische Untersuchungen am Flügelgeäder der rezenten Libellen und deren Stammgruppenvertreter (Insecta; Pterygota; Odonata), unter besonderer Berücksichtigung der Phylogenetischen Systematik und des Grundplanes der Odonata. Petalura, special volume, 2, 402 pp.
De Marmels, J. (1983) The Odonata of the region of Mount Auyantepui and the Sierra de Lema, in Venezuelan Guyana. 3. Additions to the families Gomphidae, Aeshnidae and Corduliidae, with description of Progomphus racenisi spec. nov. Odonatologica, 12 (1), 5−13.
Fleck, G. (2017) Notes on the genus Navicordulia Machado & Costa, 1995 (Odonata: Anisoptera: Corduliidae s. str.): description of a new species, phylogenetic affinities and aspects of biogeography. Zootaxa, 4272 (2), 251–262. https://doi.org/10.11646/zootaxa.4272.2.6
Fleck, G. & Juillerat, L. (2019) The genus Navicordulia Machado & Costa 1995 (Insecta: Odonata: Corduliidae s.str.): new species, identification key for males and data on ecology and distribution. Zoosystema, 41 (27), 553‒565. https://doi.org/10.5252/zoosystema2019v41a27
Fleck, G. & Legrand, J. (2013) Notes on the genus Libellulosoma Martin, 1906, and related genera (Odonata: Anisoptera: Corduliidae). Zootaxa, 3745 (5), 579–586. https://doi.org/10.11646/zootaxa.3745.5.6
Fleck, G. & Neiss, U.G. (2012a) The larva of the genus Paracordulia Martin, 1907 (Odonata: Corduliidae s.s.). Key to the larvae of Corduliidae s.l. occuring in South America. Zootaxa, 3412 (1), 62−68. https://doi.org/10.11646/zootaxa.3412.1.4
Fleck, G. & Neiss, U.G. (2012b) A new species of the genus Aeschnosoma Selys, 1871 (Odonata: Anisoptera: Corduliidae s.s.). Zootaxa, 3159 (1), 47–58. https://doi.org/10.11646/zootaxa.3159.1.3
Fleck, G., Nel, A., Bechly, G., Martínez-Delclòs, X., Jarzembowski, E.A. & Coram, R. (2003) Phylogeny and classification of the Stenophlebioptera (Insecta, Odonata, Epiproctophora). Annales de la Société Entomologique de France, 39 (1), 55−93. https://doi.org/10.1080/00379271.2003.10697363
Garrison, R.W., von Ellenrieder, N. & Louton, J.A. (2006) Dragonfly genera of the New World: an illustrated and annotated key to the Anisoptera. The John Hopkins University Press, Baltimore, xiv + 368 pp.
Geijskes, D.C. (1970) Generic characters of the South American Corduliidae, with descriptions of the species found in the Guyanas. Studies on the Fauna of Suriname and other Guyanas, 44, 1–42.
Martin, R. (1907) [1906] Cordulines. Catalogue systématique et descriptif. Collections zoologiques du Baron Edm. de Selys Longchamps, 17, 1–98.
Martin, R. (1914) Odonata. Fam. Libellulidae. Subfam. Cordulinae. Genera Insectorum, 155, 1‒32.
Mauffray W.F. & Tennessen K.J. (2019) A Catalogue and Historical Study of the Odonata of Ecuador. Zootaxa, 4628 (1), 1−265. https://doi.org/10.11646/zootaxa.4628.1.1
Machado, A.B.M. & Costa, J.M. (1995) Navicordulia gen. nov., a new genus of neotropical Corduliinae, with descriptions of seven new species (Anisoptera: Corduliidae). Odonatologica, 24 (2), 187–218.
Pfau, H.K. (2011) Functional Morphology and Evolution of the Male Secondary Copulatory Apparatus of the Anisoptera (Insecta: Odonata). Zoologica, 156, 1–103.
Selys Longchamps, E.de. (1871) Synopsis des Cordulines. Bulletin de l’Académie royale de Belgique (Série 2) 31, 238–316. [1–128 reprint]