Heteragrion mitratum : Williamson 1919
Creators: name: Vilela, Diogo Silva
name: Lencioni, Frederico A. A.
name: Bota-Sierra, Cornelio A.
name: Ware, Jessica L.
name: Bispo, Pitágoras C.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Megapodagrionidae
Heteragrion
Heteragrion mitratum

description: Heteragrion mitratum Williamson, 1919   
(Figs. 50a–e)  
[Key locator: Key to Group B species, couplet 27’]  
 Heteragrion mitratum: Williamson 1919: 39–47 (key to species, ♁ in couplet g1, ♀ in couplet c1; description and diagnosis of ♁ and ♀ from Colombia; comparison to H. aequatoriale by Ris; figs. 3–4, 50–51, 56, 63, 69, 95, 162–163);— De Marmels 1990: 335 (species recorded in Venezuela);— Ramírez 1992: 361 (species recorded in Costa Rica);— De Marmels 2004: 446 (brief larval description; figs. 28, 33, 41a, 43–44);— Garrison et al. 2010: 88 (list of Heteragrion species);— Bota-Sierra & Novelo-Gutiérrez 2017: 555, 564–567 (key to species, ♁ in couplet 6, ♀ in couplet 4; remarks and distribution in Colombia; figs. 2, 4l–m, 7a–b);— Stand-Pérez et al. 2019: 92–93 (key to species, ♁ in couplet 13, ♀ in couplet 11’; comparison with congeners; figs. 6a–b, 10g –i, 15d–f, 19).   
 Heteragrion mitratum atroterminatum: Donnelly 1992: 59–60 (description and diagnosis of ♁; figs. 5.1, 5.5, 5.9, 5.14);— Garrison et al. 2010: 88 (list of Heteragrion species);— Garrison & von Ellenrieder 2013: 14, 23 (list of species from Costa Rica; fig. 19, misspelled as “ H. m. atrolineatum ”);— Molinar et al. 2015: 87 (list of species from Panama);— Bota-Sierra & Novelo-Gutiérrez 2017: 555–556, 567 (key to species, ♁ in couplet 6’; remarks, extensive comparison with H. mitratum and H. aequatoriale and distribution in Colombia; figs. 2, 3m –n, 4d, k, 5c, 7c–f, 8d–e, 9e);— Stand-Pérez et al. 2019: 92–93 (key to species, ♁ in couplet 13’; brief remarks; figs. 6c, 10d–f, 19).   
 Material examined. 1♁ BRAZIL, Acre state, Rio Branco, Igarapé do Tucuman, 10.x.1983, A.B.M. Machado leg., ABMM; 6♁♁ COLOMBIA, Chocó Department, Unión Panamericana Municipality, Corregimiento Salero, 24.vii.2010, (6.6108, -74.5771, 100m asl), L. Pérez & J. Montes leg., UARC; 1♁ Córdoba Department, Tierralta Municipality, vereda La Oscurana, (8.1172, -76.1076), ICN; 1♁ Chocó Department, Nuquí Municipality, Corregimiento Arusi, iv.2018, C. Flórez leg., CEBUCES; 3♁♁, Department of Antioquia, Maceo Municipality, 22.i.2001, (6.5441, -74.6402, 490m asl), S. Pérez & A. Vélez leg., CEUA; 2♁♁ Puerto Berrio, Estación La Cristalina, Hacienda La Guajira, 4–6.ix.2008, (6.3700, -74.5752, 300m asl), C. Bota leg., CEUA; 1♁ San Roque Municipality, San Jose del Nus Township, 7.ii.2009, (6.4875, -74.8342, 800m asl), C. Bota leg., CEUA; 1♁ El Topacio Township, 23.vii.2013, (6.4694, -74.9019, 950m asl), J. Cogollo & Yenny Correa leg., CEUA; 1♁ Nariño Municipality, Puente Linda Township, 26.vii.2009, (5.5841, -75.1286, 750m asl), C. Bota leg., CEUA; 4♁♁ Remedios Municipality, La Cruz Township, (6.9088, -74.5672, 523m asl), L. Campuzano & C. Bota leg.; 4♁♁, San Luis Municipality, La Garrucha Township, 23.xii.2009, (6.0040, -74.9390, 397m asl), C. Bota leg., CEUA; 3♁♁ San Carlos Municipality, Samana Township, 27.iii.2012, (6.1500, -74.8000, 600m asl), Flórez & C. Bota leg., CEUA; 4♁♁ El Carmen de Viboral Municipality, El Porvenir Township, 29.xi.2016, (5.8969, -75.1795, 950m asl), C. Bota leg., CEUA; 1♁ VENEZUELA, Táchira State, San Felix, 12.iv.1996, (350m asl), J̧rg DeMarmels leg., CEUA.   
 Known distribution. Brazil (Acre state), Colombia, Costa Rica, Panama and Venezuela.   
 Diagnosis and remarks. The following character combination distinguishes this species from the remainder of Group B species: BP greatly swollen or expanded (Figs. 50c–d); all portions of cercus subequal in length (Fig. 50c); ridge above ML straight, long; ML apex acute (Fig. 50e) or blunt (Figs. 50c–d); in dorsal view, MP-AP junction rounded (Fig. 50e). Donnelly (1992) proposed the subspecies H. mitratum atroterminatum for populations of Central Panama, which was later recognized in some populations found in Colombia (Bota-Sierra & Novelo-Gutiérrez 2017). The main characteristic used to separate H. mitratum from its subspecies is the absence of black coloration on dorsal S8, which is black in H. mitratum atroterminatum.
description: Published as part of 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, pp. 1-96 in Zootaxa 5356 (1) on pages 68-70, DOI: 10.11646/zootaxa.5356.1.1, http://zenodo.org/record/10008529