Heteragrion aurantiacum Selys, 1862

Vilela, Diogo Silva, Lencioni, Frederico A. A., Bota-Sierra, Cornelio A., Ware, Jessica L. & Bispo, Pitágoras C., 2023, Taxonomic revision of the Neotropical genus Heteragrion Selys, 1862 (Zygoptera: Heteragrionidae): male morphology, new species and illustrated key, Zootaxa 5356 (1), pp. 1-96 : 23-25

Heteragrion aurantiacum Selys, 1862

( Figs. 12a–j )

[Key locator: Key to Group A species, couplet 14’] Heteragrion aurantiacum: Selys 1862: 25 [23 reprint] (description of ♁ and ♀, from “Le Brésil ”);— Selys 1886: 60 (species diagnosis, H. amazonicum and H. cinnamomeum as synonym);— Calvert 1909: 114–115 (discussion, illustration of ♁ appendages in mediodorsal view; fig. 40);— Williamson 1919: 26–28 (key to species, ♁ in couplet d1, ♀ in couplet c1; species diagnosis and illustration of head of ♁ and ♀, ♁ appendages in mediodorsal and lateral views, ♁ and ♀ prothorax in dorsal view; figs. 21–22, 78–79, 111, 121–122, 141–142, 143–144);— Santos 1968: 13–15 (larval description, illustration of larval habitus, antennae, labium, ♀ S9–10;, figs. 1–4);— Santos 1970: 149 (recorded in Itatiaia, Rio de Janeiro state);— De Marmels 1987: 231 (color similarity with H. silvarum );— Costa & Santos 1999: 2 (comparison with larvae of H. consors );— Costa & Santos 2000: 4 (key);— Lencioni 2005: 126, Figs. 75a–c (description and distribution in Brazil, illustration of ♁ appendages in mediodorsal, dorsal and lateral views);—Machado 2006: 1065 (comparison with H. beschkii );— von Ellenrieder & Garrison 2007: 6 (mention and illustration of ♁ appendages);— Garrison et al. 2010: 88 (list of Heteragrion species);— Lencioni 2013: 3, 5–6 (synonymic list, diagnosis, comparison with other congeners; figs. 11a–b, 30a–c, 42a–c, 47a, 50a–b, 60–61, 68);— Souza et al. 2013: 1368 (recorded in Minas Gerais state);— Bedê et al. 2015: 121 (recorded to Serra de São José, Minas Gerais state);— Oliveira-Junior et al. 2015: 740 (list of species);— Lencioni 2017: 129–130 (general taxonomic information; distribution; figs. 56–57);— Storari et al. 2019: 488 (recorded in Espirito Santo state);— Vilela et al. 2021: 476–482 (morphological comparison with H. lencionii ; figs. 1d–e, 2c–d);— Araújo & Pinto 2021: 6 (recorded for Paraná state);— Ribeiro et al. 2022: 275–279 (recorded in Bahia state; considered an abundant species);— Santos & Rodrigues 2022: 672 (Recorded in Bahia state; considered an indicator species).

Heteragrion amazonicum: Selys 1886: 60 (states that due to the similarities with H. aurantiacum , he refrains from describing H. amazonicum as a new species);— Williamson 1919: 29 (statements about Selys’s comment).

Material examined. 9♁♁ BRAZIL, Sergipe state, Serra de Itabaiana National Park, Ponto 3, 4.xii.2020, (- 10.7544, -37.3421), A.B. Farias & A.E. Santos leg., UFS ; 42♁♁ Riacho Água Fria , 1.xii.2020, (-10.9230, -37.0993), leg., UFS ; 35♁♁ Serra de Itabaiana National Park, Ponto 1, 7.xii.2020, (-11.3900, -37.4125), A.B. Farias & A.E. Santos leg., UFS ; 9♁♁ Serra de Itabaiana National Park, Ponto 5, 13.xii.2020, (-10.7475, -37.3408), A.B. Farias & J.C. Santos leg., UFS ; 23♁♁ Serra de Itabaiana National Park, Ponto 2 ( Well ), 7.xii.2020, (-10.7466, -37.3425), A.B. Farias & J.C. Santos leg., UFS ; 21♁♁ Serra de Itabaiana National Park, Ponto 3 ( Above the well), 7.xii.2020, (-10.7541, -37.3419), A.B. Farias & A.E. Santos leg., UFS ; 28♁♁ Serra de Itabaiana National Park , Riacho Poço das Moças, 7.xii.2020, (-10.7469, -37.3416), A.B. Farias & A.E. Santos leg., UFS ; 16♁♁ Serra de Itabaiana National Park, Ponto 2 ( Riacho Coqueiro ), 7.xii.2020, (-10.7466, -37.3425), A.B. Farias & A.E. Santos leg., UFS ; 5♁♁ same locality, but 1.ii.2021, A.B. Farias & A.E. Santos leg., UFS ; 16♁♁ Serra de Itabaiana National Park, Ponto 4, 7.xii.2020, (-10.7668, -37.3394), A.B. Farias & A.E. Santos leg., UFS ; 4♁♁ Serra de Itabaiana National Park ( No specific locality), 7.xii.2020, A.B. Farias & A.E. Santos leg., UFS ; 3♁♁ Mata do Junco, Ponto 3 ( Mata Burra ), 14.xii.2020, (-10.5425, -37.0512), A.B. Farias & B. Santos leg., UFS ; 5♁♁ Mata do Junco, Ponto 4, 14.xii.2020, (-10.5377, -37.0588), A.B. Farias & J.C. Santos leg., UFS ; 1♁ Paraná state, Cascavel, Juvinópolis , 1.iii.2015, (- 25.9675, -53.3646), M.E. Rodrigues leg., UESC ; 2♁♁ Bahia state, Ilhéus, Fazenda São Francisco , 14.x.2019, (- 14.3444, -39.1392), M.E. Rodrigues leg., UESC ; 3♁♁ Uruçuca, Serra Grande , 21.ix.2019, (-14.4402, -39.0398), M.E. Rodrigues leg., UESC ; 2♁♁ Porto Seguro, Veracel , 4.ix.2018, (-16.2950, -39.1394) .

Synonyms. H. amazonicum ( Williamson 1919; Garrison & von Ellenrieder 2019).

Known distribution. Argentina, Brazil (states of Bahia, Espírito Santo, Minas Gerais, Paraná, São Paulo, Sergipe, Rio de Janeiro), Paraguay and Venezuela.

Diagnosis and remarks. Von Ellenrieder & Garrison (2007) illustrated and confirmed the identity of this species, by examining the syntype housed at RBINS ( Fig. 12f courtesy of Jérôme Constant). See further discussion under H. cinnamomeum about the synonymy problem with H. ochraceum . This species can be separated from the remainder of Group A species by the following character combination: BP not the longest section, ventral concavity only slightly dilated; in MP, the medial lobe (ML) consisting of a single plate with a medial carina, reaching ML apex; ML bearing several teeth on its base ( Fig. 12f ); ML apex varying in width from narrow to wide but ending in a bilobate apex ( Figs. 12f–j ).

Figures

FIGURE 12. Heteragrion aurantiacum: (a–c) anterior view of head; (d–e) lateral view of pterothorax; (f–g, i) mediodorsal view of cercus; (h, j) close up on the apical portion of medial lobe (ML) showing some morphological variation.