Caenis fittkaui Malzacher, 1986

Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa & Ale-Rocha, Rosaly, 2023, New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil, Zootaxa 5339 (3), pp. 237-255 : 250-251

Caenis fittkaui Malzacher, 1986 ( Figs. 10G–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; Nascimento et al. 2022: 118 .

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

Material examined. 15 ♁ imagos (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Experimental Farm of UNIR , S11°34’56.8”, W61°45’51.4”, 14.viii.2022, Nascimento, S. R . S., Cruz, P. V ., Lima, C. R . T . cols.( INPA); one ♁ imago (light trap), Brazil, Rondônia State, Urupá municipality, Urupá River , S11°02’07.8”, W62°08’41.5”, 23.viii.2022, Nascimento, S. R . S., Cruz, P. V ., Lima, C. R . T . cols. ( INPA).

Comments. Caenis fittkaui can be differentiated from other species of Caenis by the following characteristics: apex of forceps sharp and directed posteriorly, lobes of penis fused, forming a rounded apex and with small tubercles distributed on the ventral surface (adapted from Malzacher 1986). The specimens studied did not show any morphological variation when compared with the original description of C. fittkaui .

Figures

FIGURE 10. Male imagos, body dorsal view and genitalia ventral view: A–B, Brasilocaenis elidioi; C–D, B. irmleri; E–F, Caenis chamie; G–H, C. fittkaui; I–J Latineosus sigillatus. (Scale: Figs. 10A, C, E, G, I = 1 mm; Figs. 10B, D, F, H, J = 0.1 mm).