Baetidae (Insecta: Ephemeroptera) from the state of Rondônia, Northern Brazil

Abstract


 
 
 Baetidae (Insecta: Ephemeroptera) do Estado de Rondônia, Norte do Brasil. Uma lista preliminar das espécies de Baetidae para o estado de Rondônia é apresentada tendo como base estudos da literatura, adultos e ninfas recém coletados em 20 localidades. Previamente, apenas dez espécies de Baetidae pertencentes a cinco gêneros eram registradas para o estado. Incluindo os novos registros, o estado passa a conter 27 espécies de Baetidae pertencentes a 16 gêneros: Americabaetis, Apobaetis, Aturbina, Baetodes, Callibaetis, Camelobaetidius, Chane, Cloeodes, Corinnella, Cryptonympha, Guajirolus, Harpagobaetis, Paracloeodes, Rivudiva, Spiritiops e Waltzoyphius. Dois morfótipos não puderam ser identificados e duas espécies foram consideradas novas.
 
 
 

A cladistic approach for generic delimitation of Paracloeodes Day, Rivudiva Lugo-Ortiz & McCafferty, and Varipes Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae)

“…In contrast to the group mentioned above, the genus Rivudiva is widespread in South America, with the exception of high altitudes. In Brazil, the species in this genus (some yet to be described) were collected in almost all biomes (see Boldrini & Cruz 2014, Boldrini et al 2012, Cruz et al 2011, Salles & Nascimento 2009. It is likely that future biogeographic investigation will recover these apparent evolutionary patterns, which may corroborate the paraphyletic relationship between each lineage studied here.…”

It is a mess! How many species are in Rivudiva trichobasis Lugo-Ortiz & McCafferty, 1998 (Ephemeroptera: Baetidae)?

“…Study of the paratype and four of the six official records of R. trichobasis (Lugo-Ortiz & McCafferty 1998;Cruz et al 2011;Falcão et al 2011;Boldrini et al 2012;Boldrini & Cruz 2014), under the new perspective (Cruz et al 2018;Salles et al 2020), corroborated the initial hypothesis that the lack of information resulted in a broad diagnosis of the species, causing the assignment of different species to a single name.…”

“…Meanwhile, Falcão et al (2011) reported R. trichobasis in Roraima State as well as an atypical species that should be placed in a new genus but that was not described at that time. Soon afterwards, Boldrini et al (2012) recorded R. trichobasis in northeastern Brazil, and Boldrini & Cruz (2014) recorded R. trichobasis in Rondônia State (Brazil). Lima et al (2013) described the same singular projection on the subgenital plate of the adult male of Paracloeodes charrua Emmerich & Nieto, 2009, stating that it is difficult to ascertain whether this projection represents a convergence or an indication that some species of Rivudiva would be better placed in Paracloeodes Day, 1955.…”

A new species of Cryptonympha Lugo-Ortiz & McCafferty (Ephemeroptera, Baetidae) from Cerro Duida (Venezuela)

“…A similar situation occurred with other unnamed species from French Guiana designed to the genus Cryptonympha by Orth et al (2000). Since then the type species was reported from different regions of Brazil (Falcão et al 2011;Boldrini et al 2012;Boldrini & Cruz 2014) and south-eastern Venezuela . Moreover, another two species were described, C. dasilvai from Brazil (Salles & Francischetti 2004) and C. genevievae from French Guiana (Thomas et al 2013).…”