Neotropical Thoasia Liebke, 1939 and Straneotia Mateu, 1961 of the Cryptobatida group, subtribe Agrina: Taxonomic revisions with notes on their ways of life (Insecta, Coleoptera, Carabidae, Lebiini).

Terry L Erwin ,Charlotte Aldebron

doi:10.3897/zookeys.742.22900

Terry L Erwin , Charlotte Aldebron

Open Access

https://doi.org/10.3897/zookeys.742.22900

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Abstract

Thoasia Liebke, 1939 and Straneotia Mateu, 1961 of the Cryptobatida group, subtribe Agrina, Lebiini, living in the Neotropics are diagnosed, described, and illustrated. Occurrences of known species ranges are limited to the northern and western Amazon Basin and Guyana Shield. The following species are described as new: Thoasia surinamensis Erwin & Aldebron, sp. n., Suriname, Thoasia pterosmaragdos Aldebron & Erwin, sp. n., French Guiana, Thoasia manu Erwin & Aldebron, sp. n., Ecuador, Perú; Straneotia cylindroceps Erwin & Aldebron, sp. n., French Guiana, Straneotia confundis Aldebron & Erwin, sp. n., Ecuador, and Straneotia moi Aldebron & Erwin, sp. n., French Guiana. Two of these species, Thoasia manu and Straneotia moi are known from adults collected by insecticidal fogging of lowland rainforest trees, and these trees are listed in their respective descriptions. The following species are redescribed: Thoasia rugifrons Liebke, 1939, French Guiana, Venezuela; Straneotia freyi Mateu, 1961, Brazil; Straneotia amazonica Mateu, 1961, Brazil.

Highlights

Measurements of length (ABL, SBL) and maximum width (MW) follow those of Ball (1972) and Kavanaugh (1979): ABL, measured from apex of labrum to apex of longer elytron
Most of the 144 specimens used in this study were taken from the rainforest canopy, or upper understory, using insecticidal fogging techniques, or in flight intercept traps
In regard to the genus Hyboptera, with adults having many similar physical attributes as those in Thoasia (Erwin and Henry 2017), recent discoveries of several new Hyboptera species in remote parts of the upper Amazon Basin suggests that further sampling in such areas will increase the species richness of Thoasia

Summary

Introduction

With the attributes of the genus and rugifrons species group as described above and adults with unicolorous ferrugineus head and pronotum, the latter with two longitudinal infuscated stripes from apex to base, elytra entirely dark olivaceous except translucent, narrowly explanate lateral margin, scutellum, meso-, and metathorax, and abdomen black, tibial and femoral apex infuscated. With the attributes of the genus and rugifrons species group as described above and adults with unicolorous ferrugineus head and pronotum, elytra entirely metallic dark emerald except translucent, explanate, narrow lateral margin, and meso-, and metathorax and abdomen black.

Results

Conclusion