Geographic variation in a South American clade of mormoopid bats, Pteronotus (Phyllodia), with description of a new species

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From: Journal of Mammalogy(Vol. 99, Issue 3)
Publisher: Oxford University Press
Document Type: Author abstract; Report
Length: 380 words

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Abstract :

The subgenus Phyllodia (genus Pteronotus) comprises 9 species ranging from the western coast of Mexico to central Brazil, including Greater and Lesser Antilles. Two of them, Pteronotus rubiginosus and Pteronotus sp. 1, form an endemic South American clade within Phyllodia and are reported in sympatry for several localities in Guyana, Suriname, French Guiana, and northern Brazil. We herein performed a comprehensive investigation to fully characterize the cranial variation and genetic intraspecific structuring within this clade. We also integrated genetic, morphological, and acoustic evidence to formally describe the species previously reported as Pteronotus sp. 1. Specimens of P. rubiginosus occurring in sympatry with the new species have a more distinctive cranial phenotype than those from allopatric areas, suggesting character displacement as a potential force promoting divergence by decreasing resource competition or reproductive interactions between them. Although the 2 species are sympatric in several localities, the divergence in their echolocation calls also may be promoting resource partitioning at the microhabitat level, with P. rubiginosus foraging in less cluttered areas and the new species restricted to more cluttered areas. O subgenera Phyllodia (genero Pteronotus) compreende 9 especies que ocorrem desde a costa oeste do Mexico ate o Brasil central, incluindo Pequenas e Grandes Antilhas. Duas dessas especies, Pteronotus rubiginosus e Pteronotus sp. 1, compoem um clado endemico da America do Sul em Phyllodia e sao reportadas em simpatria para diversas localidades na Guiana, Suriname, Guiana Francesa e norte do Brasil. No presente estudo nos realizamos uma investigacao aprofundada para melhor caracterizar a variacao craniana e estruturacao genetica intraespecifica dentro do clado. Nos tambem integramos evidencias moleculares, morfologicas e acusticas para descrever formalmente a especie previamente reportada como Pteronotus sp. 1. Especimes de P. rubiginosus que ocorrem em simpatria com a especies nova possuem um fenotipo craniano mais diferenciado que aqueles de areas alopatricas, sugerindo deslocamento de carater como uma forca potencial promovendo divergencia para diminuicao da competicao por recursos ou interacoes reprodutivas entre eles. Embora as duas especies sejam simpatricas em varias localidades, a divergencia em seus chamados de ecolocalizacao tambem pode estar promovendo particao de recursos em uma escala de microhabitat, com P. rubiginosus forrageando em areas menos fechadas e a especie nova restrita a areas mais fechadas. Key words: Amazon, character displacement, echolocation calls, integrative taxonomy, morphometries, new species DOI: 10.1093/jmammal/gyy048

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Gale Document Number: GALE|A545566940