Hagenulus caligatus Eaton, 1882

L, Carlos Naranjo, Peters, Janice G., del, Pedro López & Castillo, 2019, Ephemeroptera (Insecta) in Cuba, Insecta Mundi 2019 (736), pp. 1-52 : 11-12

A.15. Hagenulus caligatus Eaton, 1882

Figures 8 , 43 .

Hagenulus caligatus Eaton 1882:207 (male subimago), 1884:113; Morrison 1919:144 (nymph); Peters 1971:20; Kluge 1994:259 (egg).

Holotype. Male subimago, “ Rangel Mountains, Cuba (Poëy, Chas Wright and Gundlach).

Hagenulus caligatus was described by Eaton (1882) from a male subimago, and the nymph was later illustrated by Morrison (1919). Hagenulus nymphs are recognized by their filter-feeding maxillae and forelegs. The nymphs of Hagenulus caligatus can be separated from those of H. morrisonae by a very broad labrum which exceeds the width of the head.

Ecology. Nymphs of this species are abundant ( Alayo 1977). They live in clean rivers and fast flowing rocky streams where they are found attached to the surface of the rocks, sometimes in large numbers (Alayo in Peters 1971; Alayo 1977). Alayo (in Peters 1971) found imagos and subimagos in the early morning resting on branches near the water about 2−3 m above the ground. Subimagos molted to imagos in approximately 24 hours.

Geographic distribution. Peters (1971) and Kluge (1994) report that this species is found only in the Western region ( Fig. 8 ). Aldana and Fonseca (2001) also reported the species from the Nipe-Sagua-Baracoa Massif, but after reexamination by the senior author the record must be considered a misidentification.

Figures

Figures 6–9. Distribution records for Ephemeroptera in Cuba.6) Paracloeodes lilliputian. 7) Farrodes bimaculatus. 8) Hagenulus caligatus, H. morrisonae. 9) Borinquena sexta, Turquinophlebia grandis, Poecilophlebia pacoi.

Figures 41–46. Leptophlebiidae. 41) Poecilophlebia pacoi. 41a) Lateral margins of abdominal terga.41b) Habitus. 41c) Abdominal color pattern. 41d) Gill. 41e) Labrum with detail of anteromedian margin. 42) Turquinophlebia grandis. 42a) Color pattern of abdominal tergum 5. 42b) Labrum with detail of anteromedian margin.43) Hagenulus caligatus. 44) Hagenulus morrisonae. 44a) Head. 44b) Head. 44c) Head (variation, Nipe-Sagua-Baracoa Massif). 45) Careospina baconaoi, head. 46) Careospina hespera sierramaestrae, head. Figures 41d–42 after Kluge 1994; 43–44a after Peters 1971.