Caenis fittkaui Malzacher, 1986

Nascimento, Stênio R. S., Rodrigues, Jackson A. O., Ale-Rocha, Rosaly & Lima, Lucas R. C., 2022, New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Northeastern Brazil, Zootaxa 5133 (1), pp. 110-122 : 118-119

Caenis fittkaui Malzacher, 1986

( Figs 6G, H )

Caenis fittkaui Malzacher, 1986: 91 ; Salles et al. 2010: 304; Shimano et al. 2011: 245; Lima et al. 2015a: 3; Lima & Boldrini, 2016: 3; Lima et al. 2016b: 215.

Distribution. Brazil: states of Bahia, Espírito Santo, Mato Grosso, Pará, Pernambuco, and Roraima. New record: Piauí State.

Material examined. One ♂ imago, Brazil, Piauí, Campo Maior, Lagoa do Arain , S4°50’26.1”, W42°10’50.1”, 119 m a.s.l., 21.ix.2014, Lima, L. R . C. col. ( CEHJ). One ♂ imago, Brazil, Piauí, Piracuruca municipality, Rio Piracuruca , Prainha , S03°56’15.9”, W41º42’36.1’’, 74 m a.s.l., 10.xii.2015, Silva, A.P.S. col. ( CEHJ). One ♂ imago, Brazil, Piauí, Barras municipality, Rio Marataoan , Pesqueiro, P 1, S04°15’13.7”, W42°17’19.1”, 84 m a.s.l., 10.xii.2015, Silva, A.P.S. col. ( CEHJ) .

Comments. Caenis fittkaui can be differentiated from other species of Caenis by the following characters: apex of forceps sharp and directed posteriorly, lobes of penis fused, forming a rounded head and with small tubercles distributed on the ventral surface (adapted from Malzacher 1986).

Figures

FIGURE 6. Male imagos, body dorsal view and genitalia ventral view: A–B, Brasilocaenis irmleri; C–D, B. elidioi; E–F, Caenis chamie; G–H, C. fittkaui. (Scale: Figs 5A, C, E, F = 1 mm; Figs 5B, D, F, H = 0.2 mm).