Rivudiva trichobasis Lugo-Ortiz & McCafferty, 1998

Salles, F. F., Nieto, C. & Cruz, P. V., 2020, New species of Rivudiva Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae) with comments on R. minantenna Lugo-Ortiz & McCafferty and R. trichobasis Lugo-Ortiz & McCafferty, Zootaxa 4786 (1), pp. 37-52 : 49

publication ID	https://doi.org/ 10.11646/zootaxa.4786.1.3
publication LSID	lsid:zoobank.org:pub:625F197D-9D26-4B00-AF3E-3045586ECB07
DOI	https://doi.org/10.5281/zenodo.4328824
persistent identifier	https://treatment.plazi.org/id/038B87F6-A57B-1F64-0AED-B3C4BC715271
treatment provided by	Felipe
scientific name	Rivudiva trichobasis Lugo-Ortiz & McCafferty, 1998
status

Treatment

Rivudiva trichobasis Lugo-Ortiz & McCafferty, 1998 View in CoL

Rivudiva trichobasis Lugo-Ortiz and McCafferty (1998: 64) View in CoL ; Domínguez et al. (2006: 176); Falcão et al. (2011: 539); Cruz et al. (2011: 60) View Cited Treatment ; Boldrini et al. (2012: 93); Boldrini & Cruz (2014: 5).

Material examined. 1 nymph, Paratype (slide #270 IBN): BRAZIL, Rio Grande do Sul state, Arroio dos Vargas, S 30 o 50’ W 53 o 10’, 120 m. a.s.l., xi.1964, F Plaumann col. 7 nymphs, GoogleMaps BRAZIL, Espírito Santo state, Linhares, Rio São José, S 19°07’33.1 W 40°14’26.1”, 24 m. a.s.l., 26.viii.2011, FF Salles leg. (4 UFVB, 3 IBN, 1 used for SEM images). 1 nymph, GoogleMaps BRAZIL, Espírito Santo state, Afonso Cláudio, Cachoeira do Funil , S 20°08’35.1”, W 41°09’02.0’’, 440 m. a.s.l., 02.iii.2014, FC Massariol col. ( UFVB). 19°07’33.1”S/ 40°14’261”W. 1 nymph, GoogleMaps BRA- ZIL, Espírito Santo state, Cariacica Reserva Biológica Duas Bocas, S 20°15’28.5”, W 40°29’38.3”, 210 m. a.s.l., 02.x.2013, FC Massariol col. ( UFVB) GoogleMaps .

Diagnosis

Nymph. 1) antenna with robust, apically pointed setae on scape and pedicel ( Fig. 28 View FIGURES 22−29 ); 2) distal margin of labrum with deep, wide, medial emargination ( Fig. 23 View FIGURES 22−29 ); 3) dorsal surface of labrum with irregular rows of setae ( Fig. 23 View FIGURES 22−29 ); 4) outer margin of mandibular incisors with spine-like processes ( Fig. 29 View FIGURES 22−29 ); 5) tuft on apex of lingua formed by short simple setae (as in Fig. 14 View FIGURES 11−16 ); 6) maxillary palp segment I of intermediate length, reaching ⅔ of apex of galea-lacinia; 7) glossa with base not expanded, apex rounded and with dorsal thick setae mostly restricted to distal margin (as in Fig. 16 View FIGURES 11−16 ); 8) hind wing pads absent; 9) trochanter with robust, long apically pointed setae; 10) outer dorsal row, medial dorsal row and inner dorsal row robust of femora with long and apically pointed setae, those of outer row almost as long as maximum width of femur ( Fig. 33 View FIGURES 30−37 ); 11) abdominal sterna with robust, apically pointed setae ( Figs 36–37 View FIGURES 30−37 ); 12) paraproct with robust, apically pointed setae and 8-10 marginal spines.

Imago (according to Cruz et al. 2011). 1) dorsal portion of turbinate eyes with inner margins not parallel, divergent anteriorly (figs 1, 2 in Cruz et al. 2011); 2) length of forewing about 3.7× width (fig. 3 in Cruz et al. 2011); 3) hind wings absent; 4) segment III of abdomen with one large medially red mark near anterior margin (figs 4, 5 in Cruz et al. 2011); 5) forceps segment III oval, 2× as long as wide (fig. 6 in Cruz et al. 2011); 6) posterior margin of subgenital plate with apex concave (fig. 6 in Cruz et al. 2011).

Distribution. Paraguay and Brazil (Rio Grande do Sul, Espírito Santo, Amazonas and Roraima) ( Fig. 41 View FIGURE 41 ).