Two new species and new records of springtails (Collembola: Entomobryidae, Paronellidae) from Nevis, Lesser Antilles

Authors

  • Felipe N. Soto-Adames University of Illinois, Urbana-Champaign
  • Evan W. Anderson Murray State University

Keywords:

West Indies, chaetotaxy, biogeography

Abstract

We present the first records of species of Entomobryidae and Paronellidae (Collembola) from the Caribbean island of Nevis, from leaf litter collections
on Mt. Nevis. We report 6 genera and 7 species, of which Dicranocentrus icelosmarias sp. nov. and Metasinella radkei sp. nov. are described as new. Evaluation of the dorsal chaetotaxy of D. icelosmarias sp. nov. suggests a closer affinity of Dicranocentrus to Heteromurus than to Orchesella. We provide a new interpretation of the homology of the dorsal chaetotaxy in Metasinella based on analysis of M. radkei sp. nov. The 6 genera reported here are widely distributed in the Greater Antilles, and the species composition shows a combination of endemics with affinities to other Antillean species (Dicranocentrus sp., Lepidocyrtus sp., Metasinella sp., Trogolaphysa sp.), species widespread throughout the northeastern Antilles (Entomobrya linda Soto-Adames), and adventive Neotropical species (Lepidocyrtus nigrosetosus Folsom, Seira brasiliana [Arlé]).

Resumen
Presentamos el primer reporte de Entomobryidae y Paronellidae (Collembola) para la isla de Nevis, a partir de colecciones de hojarasca provenientes de Mt. Nevis. Las muestras incluyen 6 géneros y 7 especies de la cuales Dicranocentrus icelosmarias sp. nov. y Metasinella radkei sp. nov, son nuevas. Nuestra interpretación de la quetotaxia dorsal de D. icelosmarias sp. nov. indica que Dicranocentrus es más afín a Heteromurus que a Orchesella. Presentamos una nueva interpretación de la homología de la quetotaxia dorsal en Metasinella basada en el estudio de M. radkei sp. nov. Los 6 géneros reportados aquí están ampliamente distribuidos en las Antillas Mayores, mientras que las especies comprenden una combinación de formas endémicas con afinidades a otras especies antillanas (Dicranocentrus sp., Lepidocyrtus sp., Metasinella sp., Trogolaphysa sp.), formas de distribución amplia en el noreste antillano (Entomobrya linda Soto-Adames) y formas neotropicales adventicias (Lepidocyrtus nigrosetosus Folsom y Seira brasiliana [Arlé]).

 

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Published

2017-04-16

Issue

Vol. 100, No. 1 (March 2017)

Section

Research Papers

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