The grandinosus species group (Figs. 33, 34, 35) The grandinosus groupwas first proposed by De Andrade and Baroni Urbani (1999) including five species: C. persimplex, described by De AndradeinDe Andradeand Baroni Urbani (1999), C. klugi, knownonly for the gyne, C. persimilis, C. grandinosus, and C. foliaceus. These last three composed the formerpinelii group by Kempf (1952), along with C. incertus, C. maculatus, C. pinelii, andC. scutulatus. Grandinosus and pinelii are sister groups in the morphological phylogeny (De Andrade and Baroni Urbani, 1999, see their Fig. 24), sharing many characters, as the strongly dorsoventrally flattened body, dorsum of mesosoma continuous, and lamellarexpansions on mesosoma, petiole, postpetioleand gaster. Both groups differ only by the presence of a lamella on hind femora and the lighter color in grandinosus. In the molecularphylogeny (Price et al., 2016, see their Fig.S3), the grandinosus andpinelii groups arerecovered asparaphyletic. Cephalotes foliaceus (grandinosus group) is sister to C. sp. 2 (here described as C. mariadeandrade new species, of thepinelii group). The clade formed by the otherspecies of the grandinosus group (C. grandinosuş C. klugi, C. persimplex and C. persimilis) is the sister group of a clade formed by some of the previously designated species of the pinelii group (C. maculatus, C. liepini, C. nilpiei, C. pinelii and C. pileini) (Fig. 54). The morphologicalsimilarities and phylogeneticassociation between speciesof the pinelii andgrandinosus groupssuggest theylikely represent asingle evolutionarylineage (Fig. 54). Evenbeing paraphyletic, these groups are morphologically diagnosable, thus we kept it separate here, since we have not examined the species occurring outside Brazil in this study, what would help to better understand the relationships and limits between these species and redefine these groups. Diagnosis: In workers, body strongly flattened dorsoventrally. In dorsal view, dorsum of mesosoma continuous, with lamellar lateral expansions. In workers and soldiers, hindfemora with a ventral and/or dorsal lamellar crest, usually crenulate and narrow (Fig.2k, 3k). Petiole and postpetiole with lamellar lateral expansions. Brazilian species of grandinosus group Cephalotes grandinosus (Smith, 1860) Obsolete combination: Cryptocerus grandinosus = Cephalotes grandinosus nevadensis (Forel, 1912) Obsolete combination:Cryptocerus grandinosus nevadensis Cephalotes klugi (Emery, 1894) Obsolete combination: Cryptocerus klugi Cephalotes persimilis De Andrade, 1999 Cephalotes persimplex De Andrade, 1999 Key to the identification of Brazilian species of the grandinosus group of Cephalotes based on workers (Figs. 33 a-d) Note: Cephalotes klugi is known only for the gyne. 1 In dorsalview, anterior portion of thelamellar expansions of the gaster flat, continuouswiththegastraltergite (Fig.33c)......................... C. grandinosus 1’ Indorsal view, anteriorportion of thelamellar expansionsof thegaster bentdorsally, notcontinuous withthegastral tergite (Fig.33d).......................2 2 Body hairs appressed, relatively broad and uniform, without a submedian constriction (Fig.33a)............................................... C. persimplex 2’ Body hairsrelatively narrow, with a submedian constriction, which is not appressed to the body likethe remain partof the hair (Fig.33b).......... .................................................................................................................... C. persimilis Key to the identification of Brazilian species of the grandinosus group of Cephalotes based on soldiers (Figs. 34 a-f) Note: Cephalotes klugi is known only for the gyne. 1 In frontal view, cephalic disc areolate (Fig. 34a).......... C. grandinosus 1’ Infrontal view, cephalic disc foveate, space between foveae microalveolate (Fig. 34b).....................................................................................2 2 Inlateral view, hairs oflateral faceofhead abundant, most hairstouching eachother (Fig.34c). Hairsof headsubspatulate (Fig.34d)......... C. persimplex 2’ Inlateral view, hairsoflateral faceofheadsparse,hairs nevertouching each other (Fig.34f). Hairsof headsubrectangular (Fig.34e)............ C. persimilis

Published as part of Oliveira, Aline Machado, Powell, Scott & Feitosa, Rodrigo Machado, 2021, A taxonomic study of the Brazilian turtle ants (Formicidae: Myrmicinae: Cephalotes), pp. 1-52 in Revista Brasileira de Entomologia 65 (3) on pages 31-32, DOI: 10.1590/1806-9665-RBENT-2021-0028, http://zenodo.org/record/5512220