A taxonomic study of the Brazilian turtle ants (Formicidae: Myrmicinae: Cephalotes) Author Oliveira, Aline Machado Author Powell, Scott Author Feitosa, Rodrigo Machado text Revista Brasileira de Entomologia 2021 2021-09-13 65 3 e 20210028 1 52 http://dx.doi.org/10.1590/1806-9665-rbent-2021-0028 journal article 4261 10.1590/1806-9665-RBENT-2021-0028 69cf944a-43de-4eeb-bdd7-3dee10cde70c 5512220 The umbraculatus species group ( Fig. 53 ) The monotypicumbraculatus group was created by Kempf (1958a). He discussed the position of the species, which shares characters with the angustus and pinelii groups, but is different enough to be separated from them. Kempf’s proposal was corroborated by the morphological and molecular phylogenies (De Andrade and Baroni-Urbani, 1999, see their Fig. 24 ; Priceet al., 2014, 2016, see their Fig. S3 ), both phylogenies recover this species as a monophyletic lineage. The recent molecular phylogenies byPrice et al. (2014, 2016) recovered umbraculatus as a sister group of the clade formed by the angustus , fiebrigi and prodigiosus groups ( Fig. 54 ). Cephalotes umbraculatus is broadly distributed in Central America and north of South America. Diagnosis: In workers, body with appressed hairs. Dorsal and declivous face of propodeum continuous, not meeting in a distinct propodeal angle, with a variable number of spines. Dorsum of petiole without denticles. Gaster yellowish with a cross-shaped dark macula, anteriorly with lamellarexpansions ( Fig. 2p ). In soldiers, in dorsal view, pronotum crest with pointed edges ( Fig. 3f ). Brazilian species of umbraculatusgroup Cephalotes umbraculatus (Fabricius, 1804) Obsolete combination: Cryptocerus umbraculatus = Cephalotes elegans (Smith, 1853) Obsolete combination: Cryptocerus elegans = Cephalotes flavomaculatus (Mayr, 1862) Obsolete combination: Cryptocerus flavomaculatus = Cephalotes quadriguttatus (Guérin-Méneville, 1844) Obsolete combination: Cryptocerus quadriguttatus