Revision and cladistic analysis of Arthrosolaenomeridini Hoffman, 1976 (Diplopoda: Polydesmida: Chelodesmidae)

Author(s)

Rodrigo Salvador Bouzan

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB)
• Defense date: 2020-04-23

Examining board members

Antonio Domingos Brescovit; Amazonas Chagas Junior; Ricardo Ott

• Advisor: Antonio Domingos Brescovit

Abstract

Chelodesmidae is one of the most diverse family belonging to Polydesmida, comprising almost 800 described species distributed in 172 genera, 20 tribes and two subfamilies. Among the tribes within the Neotropical subfamily Chelodesminae, Arthrosolaenomeridini represents a very interesting group occurring in the Central-West region of Brazil. Currently the tribe contains three genera: Arthrosolaenomeris Schubart, 1943, Gangugia Schubart, 1947, and Angelodesmus Schubart, 1962. In this study, we conducted a cladistic analysis including 18 species of Arthrosolaenomeridini and 7 species of other associated Chelodesminae tribes as an outgroup. The matrix is composed of 64 morphological characters, 39 characteres are herein proposed for the first time and 25 characters were scored based on the previous cladistic analysis for Chelodesmidae groups. The data was analyzed under the parsimony criterion, using TNT 1.5. Based on the results, Arthrosolaenomeridini was recovered as monophyletic with Macrocoxodesmini + Telonychopodini as sister group. The genera Arthrosolaenomeris Schubart, 1943 and Gangugia Schubart, 1947 was recovered as monophyletic. The genus Angelodesmus Schubart, 1962 was recovered as paraphyletic and redefined as monotypic. The tribe is now composed by the genera Arthrosolaenomeris Schubart, 1943 (6 spp.), Gangugia Schubart, 1947 (6 spp.), Angelodesmus Schubart, 1962 (monotypic), Abiliodesmus gen. nov. (4 spp.) and Folcloredesmus gen. nov. (monotypic). The resulting synapomorphies for the tribe are: presence of lateral macrosetae, in mesal aspect, in gonocoxae; telopodite with a cingulum on the lateral margin and solenomere as a single branch. In addition, we conduct a taxonomic revision of the tribe Arthrosolaenomeridini. We provided in this study detailed redescriptions, drawings and distribution maps for all species and genera, as well for the two new genera and the ten new species. Two new genera are described: Abiliodesmus gen. nov and Folcloredesmus gen. nov; as well ten new species: Arthrosolaenomeris saci sp. nov.; A. curupira sp. nov.; A. caipora sp. nov.; A. iara sp. nov.; Gangugia boitata sp. nov.; G. cuca sp. nov.; G. boto sp. nov.; G. mula sp. nov.; Abiliodesmus mapinguari sp. nov. and Folcloredesmus thomasi sp. nov. In addition, we include an identification key to all the genera and species of Arthrosolaenomeridini (AU)

• FAPESP's process: 18/00103-8 - Review and cladistic analysis of Arthrosolaenomeridini Hoffman, 1976 (Diplopoda: Polydesmida: Chelodesmidae)
• Grantee: Rodrigo Salvador Bouzan
• Support Opportunities: Scholarships in Brazil - Master