Cladistic analysis of Landrevinae Gorochov, 1982 (Orthoptera, Gryllidae)

• Grant number: 16/19183-6
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): March 01, 2017
• Effective date (End): March 31, 2020
• Field of knowledge: Biological Sciences - Zoology - Taxonomy of Recent Groups
• Principal researcher: Silvio Shigueo Nihei
• Grantee: Darlan Rutz Redu
• Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 19/04729-1 - Morphological studies of Landrevinae Gorochov, 1982 (Orthoptera, Gryllidae) and related taxa, with emphasis in male genitalia and tegmina, BE.EP.DR

Abstract

Orthoptera comprises popularly known insects like crickets, locusts, grasshoppers, katydids and weta. This order has 27 thousand described species divided into two suborders, Caelifera and Ensifera, recognized as monophyletic. In Ensifera, the infraorder Gryllidea, taxon that comprises all the crickets, is monophyletic and divided into two superfamilies, Gryllotalpoidea and Grylloidea. The Neotropical crickets are still too little understood due to the shortage of taxonomists and systematists in the group, which results in serious problems as dubious classifications and underestimated diversity. The subfamily Landrevinae Gorochov, 1982 currently has 170 valid species, distributed in 38 genera and three tribes: Landrevini, Odontogryllini and Prolandrevini. They occur in Neotropical, Afrotropical, Oriental and Australasian regions. Recent studies show that traditional subfamilies of Gryllidae do not recovery natural groups (monophyletic) and have a confused delimitation. The objectives of this project are: to perform a morphological study of the phallic complex, copulatory papilla and tegminas (forewings) of Landrevinae to propose homology hypotheses; propose a hypothesis based on morphological characters on the phylogenetic relationships among genera of Landrevinae and between Landrevinae and related taxa of Gryllidae; test the monophyly and delimit the composition of Landrevinae and its supra specifics taxa (genera and tribes); and propose a supra specific classification for Landrevinae. (AU)