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Cryptic diversity in the mayfly Leptohyphodes inanis (Pictet) (Ephemeroptera: Leptohyphidae) across water basins in Southeastern Brazil
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Orientador(es)
Resumo(s)
Leptohyphodes inanis (Pictet) is an enigmatic species with a rare trait among leptohyphid males – large and divided
compound eyes. In addition, the color of its upper portion is variable across – but not within – populations. However,
the geographic variation of this trait and its relation to gene flow across populations remain unknown. Here, we
analyzed individuals across Southeastern Brazil (19 to 24 S and 40 to 48 W) to (i) assess genetic (COI) and eye
color variation, and (ii) evaluate if L. inanis is a single species, by combining Bayesian phylogenetic analyses (including
two other leptohyphid genera – Tricorythopsis and Tricorythodes) and species delimitation methods: ABGD and mPTP.
To further investigate within-species variation in phenotypic traits, we evaluated quantitative and qualitative
morphological traits of 1,252 individuals. We found that genetic variation in L. inanis is largely unrelated to eye color,
and that pairwise genetic divergences in COI mtDNA are remarkably higher (up to 30.7%) than previously found in
other mayfly lineages. L. inanis was recovered as monophyletic, although results suggest it includes three to seven
cryptic species, each one related to mountain ranges across Southeastern Brazil. Furthermore, we found no genetic
variation among individuals of the same drainage basin, suggesting that populations might be largely isolated from one
another. Because morphological traits traditionally used in Ephemeroptera taxonomy were ineffective in distinguishing
the cryptic species, we propose L. inanis to be a species complex
Descrição
Palavras-chave
Canastra mountain range DNA barcode Mantiqueira system phylogenetics species delimitation
Contexto Educativo
Citação
Paula Malaquias Souto, Luiz Felipe Lima da Silveira, Daniela Maeda Takiya & Frederico Falcão Salles (2021): Cryptic diversity in the mayfly Leptohyphodes inanis (Pictet) (Ephemeroptera: Leptohyphidae) across water basins in Southeastern Brazil, Systematics and Biodiversity
Editora
Taylor & Francis