Heteragrion calafatiensis, Mendoza-Penagos & Juen & Vilela, 2022

Mendoza-Penagos, Cristian Camilo, Juen, Leandro & Vilela, Diogo Silva, 2022, Heteragrion calafatiensis (Odonata: Heteragrionidae) sp. nov. from Northern Brazil, Zootaxa 5124 (2), pp. 223-229 : 224-227

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Heteragrion calafatiensis

sp. nov.

Heteragrion calafatiensis sp. nov. Mendoza-Penagos, Juen & Vilela, 2022

( Figs. 1 View FIGURE 1 , 2a–d View FIGURE 2 )

Holotype. ♂ (C1523), Brazil, Pará, Municipality of Magalhães Barata, way to Calafate village, near to the Marapanim River , (-0.863291, -47.668058), 20 m, 26.ix.2021, C.C. Mendoza-Penagos leg., UFPA. GoogleMaps

Etymology. Named calafatiensis (adjective) in reference to the village of Calafate (type locality) in the Northeastern region of Pará state.

Description of holotype

Head ( Figs. 1 View FIGURE 1 , 2a View FIGURE 2 ). Eyes yellow; labium and labrum brown; base of mandibles and genae pale, apex of mandibles black; antefrons pale yellow; vertex and remainder of head black, except for a curved pale yellow stripe connecting lateral ocelli with the antennae.

Thorax ( Figs. 1 View FIGURE 1 , 2b View FIGURE 2 ). Prothorax mostly yellow, lighter-colored laterally, with darker tones on dorsal areas: one brown stripe on each side of midline and another medial one; hind lobe rounded, mostly dark brown with yellow lateral stripes. Pterothorax with a black middorsal carina, and a thin pale yellow humeral stripe; mesepisternum mostly orange with a dark posterior spot; mesopleural suture pale yellow; mesepimeron dark orange; upper half of metepisternum pale yellow, remainder orange; remainder of pterothorax pale, except for a thin orange stripe on metepimeron. Coxae and trochanter pale yellow; femora alternating pale yellow and dark brown areas; tibiae brown; tarsi dark brown.

Wings ( Fig. 1 View FIGURE 1 ). Hyaline, almost reaching S6 when closed; venation black, Pt dark brown; Pt overlying 3 cells in all wings, oblique proximally; 2 Pq cells in all wings; 18 Px in FW, 16 Px in HW.

Abdomen ( Fig. 1a View FIGURE 1 ). S1 pale yellow, with darker tones laterally and dorsally; S2 black dorsally, pale yellow laterally; S3–6 black with medially interrupted pale yellow basal rings and pale yellow medial stripes; S7 black with a thick medially interrupted pale yellow basal ring and a roughly quadrangular spot medially; S8–9 mostly black, pale yellow areas laterally; S10 orange laterally, with black borders and black dorsum.

Anal appendages ( Figs. 2c–d View FIGURE 2 ). Cercus dark brown with darker coloration especially on apex, carinas and spines; ventrobasal expansion absent; MP rounded, platelike morphology, rounded apex; ScP forming a small ridge bearing 4–5 denticles. Paraprocts pale yellow, posteriorly oriented, not reaching 1/2 of cercus, acute apex.

Measurements. FW 21.6; HW 20.9; Abdomen 32.3; Total 39.6.

Female. Unknown.

Differential diagnosis. Heteragrion calafatiensis sp. nov. belongs to Heteragrion Group B (sensu Lencioni 2013), in which males possess an elongated paraproct. The morphologically closest species to H. calafatiensis is H. chlorotaeniatum De Marmels, 1989 , and those two species can be separated by the following character combination ( H. chlorotaeniatum in parentheses): VbA absent (VbA present, Fig. 2f View FIGURE 2 ), MP ( Fig. 2c View FIGURE 2 ) with rounded apex (MP with acute apex, Fig. 2e View FIGURE 2 ), ScP forming a small ridge bearing 4–5 denticles ( Fig. 2c View FIGURE 2 ) in a single row (ScP forming a curved ridge bearing several teeth in a single row, Fig. 2e View FIGURE 2 ), paraprocts ( Fig. 2d View FIGURE 2 ) posteriorly oriented (paraprocts dorsally oriented, Fig. 2f View FIGURE 2 ).

Habitat and Ecology. The new species was found around 10:30 am, perched approximately 2 m high, on the branches that come off shrubs in a ravine along the banks of a small stream, in an Upland Forest shady area ( Fig. 3 View FIGURE 3 ). Upland Forests are forests that develop in areas not subjected to flooding due to their location, mostly in higher regions of the Amazon relief ( Vicentini 2001). The weather conditions on the collection day were very sunny, despite the little sun on the collection site. The vegetation is dominated by shrubs and medium-sized trees in that location. The stream bottom is mainly composed of sand and grass, clear water and a maximum depth of 10 cm. Upstream, the environment in Calafate consists of a first-order stream (narrower than 1m) with slow current, with an open area in full sunlight, forming a small pool (approximately 80–90 cm deep) with several macrophyte individuals. This portion of the stream is inhabited mainly by species from lentic environments such as: Acanthagrion kennedii Williamson, 1916 , Erythrodiplax castanea (Burmeister, 1839) , Micrathyria sp. , Orthemis discolor (Burmeister, 1839) and Perithemis thais Kirby, 1889 .