Asthenopus angelae de Souza & Molineri

Molineri, Carlos, Salles, Frederico F. & Peters, Janice G., 2015, Phylogeny and biogeography of Asthenopodinae with a revision of Asthenopus, reinstatement of Asthenopodes, and the description of the new genera Hubbardipes and Priasthenopus (Ephemeroptera, Polymitarcyidae), ZooKeys 478, pp. 45-128 : 92-95

Taxon classification Animalia Ephemeroptera Polymitarcyidae

Asthenopus angelae de Souza & Molineri Figs 4D, 14B, F, 15 F–G, 16 J–K, 17D, 18B

Material

(see de Souza and Molineri 2012). Additional records: 13 nymphs (including 3 male and 1 female pharate subimago) from BRAZIL, Amazonas, Codajás, Urucurizinho, Lago Cuxuará (A10-lago Aquapi 14), 15.ix.2003 (slides IBN645CM and IBN646CM) (aprox. S 3°55' − W 62°3'); and 1 pharate male subimago from BRAZIL, Amazonas, São Paulo de Olivença, Bom Sucesso (A02-agapito), 9.iv.2003 (slide IBN606CM) (aprox. S 3°28' − W 68°59'). Deposited in INPA (4 nymphs), CZNC (6 nymphs), IBN (3 nymphs).

Diagnosis.

Only one autapomorphy was recovered in our analysis for Asthenopus angelae , a change in the ratio A (total length forceps)/E(basal width) from 6.2 to 6.5-7.1 (i.e., forceps become slightly slender). This species can be recognized by the following combination of characters: 1) FW size male 7.0-10.0 mm (Fig. 16 J–K), female 12.0-17.0 mm; 2) ratio FW/foreleg length 1.4-1.6; 3) pronotum width/length ratio: 2.0-2.2 (male), 2.2-2.9 (female); 4) 5-11 imv present in male FW, relatively short and poorly anastomosed; 5) male FW with 1-4 cross veins between Rs and MA basal to Rs fork; 6) ratio total length/basal width of forceps 6.5-7.1 (Fig. 17D); 7) penes tubular, with well developed thumb, curved ventro-medially, with apex projecting acutely, furrow separating penial lobe from thumb reduced or absent (Fig. 17D), pedestals subrectangular to subovate, relatively large; 8) female sternum VIII with anteromedian keel and reduced sockets similar to other species; 9) eggs (Fig. 18B) with 3-5 threads on polar caps, ratio maximum width of egg/maximum width of PC 1.1-1.3, chorion with smooth area around rounded disks; 10) nymph, ratio total length of mandible / mandibular tusk length 1.6; 11) space between the subbasal and the submedian tubercles relatively long and straight (Fig. 14B).

Distribution.

Argentina, Bolivia, Brazil, Colombia and Peru.

Discussion.

This species was recently described from all the stages ( de Souza and Molineri 2012), and in our analysis it appears as sister to Asthenopus magnus , but with relatively low support. In the original description, nymphs and female adults were not distinguished from Asthenopus curtus , because of lack of characters. We proposed (above in diagnosis) some characters that should be checked and confirmed with the study of more material. We suggest that specific identification of this and the other species of the genus should be confirmed when possible with the study of male genitalia. Peru was mentioned by de Souza and Molineri (2012) in the list of material but not in the distribution, so here it is added in that section.