Notes about morphological features of the Western Hemisphere subtribe Ardistomina, and revision of genus Semiardistomis Kult (Coleoptera, Carabidae, Scaritinae, Clivinini)

Pavel Valdes

doi:10.3897/zookeys.210.3042

Abstract

Comparisons of structural features (principally mouthparts, elytral-abdominal locking mechanism, and female genitalia) of the ardistomine genera (Aspidoglossa Putzeys, Ardistomis Putzeys, and Semiardistomis Kult) with those features of members of the subtribe Clivinina (Clivina Latreille, Oxydrepanus Putzeys, Schizogenius Putzeys,Ancus Putzeys, Nyctosyles Putzeys, and Obadius Burmeister) confirm the taxonomic validity of the subtribe Ardistomina. Based on morphological features, the ardistomine genera are postulated to be related as follows: [Aspidoglossa [Ardistomis + Semiardistomis]]. Knowledge of this subtribe is further extended by taxonomic treatment of the genus Semiardistomis Kult. Of the 30 valid names of Semiardistomis previously recognized, four were proposed as variety names, and are listed as junior synonyms: Ardistomis labialis picipes Bates, 1881, Ardistomis labialis nanus Bates, 1881, and Ardistomis labialis dilatatus Bates, 1881; and Ardistomis pallipes caerulea Putzeys, 1846. Eight names, treated as specific epithets, are junior synonyms, as follows: Ardistomis (Semiardistomis) balthasari Kult, 1950 = Semiardistomis glabratus (Putzeys, 1866); Ardistomis (Semiardistomis) emdeni Kult, 1950 = Semiardistomis deletus (Putzeys, 1846); Ardistomis aenea Putzeys, 1866, Ardistomis (Semiardistomis) brittoni Kult, 1950, and Ardistomis (Semiardistomis) marani Kult, 1950 = Semiardistomis flavipes (Dejean, 1831); Ardistomis tuspanensis Putzeys, 1846 = Semiardistomis labialis (Chaudoir, 1837); Ardistomis (Semiardistomis) vlastae Kult, 1950 = Semiardistomis subglabra (van Emden, 1949); and Ardistomis striga Putzeys, 1866 = Semiardistomis pallipes (Dejean, 1831). Two new species described are Semiardistomis exspectatus sp. n. (type locality PERU, Madre de Dios, Rio Manu, 11°56'47"S, 071°17'00"W), and Semiardistomis major sp. n. (type locality PERU, Loreto, Rio Samiria, 05°12'S, 75°20'W). The 20 species of Semiardistomis are arranged intwo species–groups here proposed: the puncticollis group, including 12 species; and labialis group, including eight species. The species recognized are keyed, described or redescribed, and notes are provided about their Geographical distribution, habitat and activity. Distribution maps show known geographical ranges, from which are inferred patterns of speciation from a center of radiation in northern South America of both lineages.

Highlights

The major part of this paper treats the species of Semiardistomis, a more general background is provided by a preliminary treatment of the subtribe Ardistomina and comparison with other taxa of the tribe Clivinini, principally the nominotypical subtribe Clivinina
Semiardistomis vicinus (Putzeys, 1846) Semiardistomis rostrata (Dejean, 1825). This revision has added an important part in understanding of the structure of subtribe Ardistomina
At this point the road is clear to complete revisions for the rest of Ardistomine genera, which are under construction and will help with new elements to a better comprehension of inter generic relationships

Summary

Introduction

The major part of this paper treats the species of Semiardistomis, a more general background is provided by a preliminary treatment of the subtribe Ardistomina and comparison with other taxa of the tribe Clivinini, principally the nominotypical subtribe Clivinina. The first arrangement of the group was made by Putzeys (1866) who recognized common characters to designate his “deuxieme groupe” of genus Ardistomis Putzeys Despite that, he placed the North American species of Semiardistomis Kult in a separate group; this structure started recognition of the group as a different entity from its generic origin. Kult’s structure was built using characters that proved to be superficial, so species with different origin were placed in the same group. This new scheme resulted in inclusion of some species of the genus Ardistomis in Semiardistomis, a mistake followed by subsequent authors until Valdes (2009) made the necessary corrections. The last published list of species names of Semiardistomis was compiled by Lorenz (2005)

Material and methods

Concluding remarks