Centris (Wagenknechtia) Moure, 1950

Centris (Wagenknechtia); Snelling, 1956. 32: 5 (Systematic note). Anderson, 1979. 11: 222 (Bionomics). Neff & Simpson, 1981. 54: 106, 107, 118 (Morphology, distribution, note on phylogeny, comparison with Centris (Paracentris) Cameron, 1903 and C. (Melacentris) Moure, 1996). Coville et al., 1983. 56: 116, 117, 121 (Cited, systematic note, nesting behaviour). Snelling & Brooks, 1985. 369: 23 (Cited). Coville et al., 1986. 59: 325 (Cited). Buchmann, 1987. 18: 355 (Descriptive note, floral records, bionomics). Vogel, 1988. 26: 348, 350 (Figure about phylogeny within Centridini, cited). Cocucci, 1991. 174: 31 (Cited). Chiappa, 1998. 22: 90 (Key). Chiappa et al., 2000. 24: 24 (Systematic note). Michener, 2000: 732−735 (Cited, key, distribution, comparison with Centris (Paracentris)) . Fernández, 2001. 2: 109 (List, distribution). Ayala, 2002. 25: 2 (Cited). Fernández, 2002. 2: 129 (List, distribution). Machado et al., 2002. 4: 357 (Descriptive note). Silveira et al., 2002: 93 (Cited). Vivallo et al., 2003: 78 (Cited, systematic note). Machado, 2004: 258 (Descriptive note, floral record). Rocha-Filho et al., 2009. 26: 302 (Cleptoparasites). Cappellari et al., 2011. 107: 1331 (Morphology, behaviour). Cilla & Rolón, 2012b. 67: 573 (Bionomics). Giannini et al., 2013. 258: 76, 79 (Floral relationships, phylogenetic relationships within Centris).

Diagnosis. The species of this subgenus are identified by a combination of the following characters (both sexes): head and mesosoma with integument dark brown to black, never with yellow areas (Figs. 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27); metasoma with metallic reflections (in some species) (Figs. 2, 4, 18, 20, 22, 24, 26, 28, 35 and 36), wing membranes translucent (Figs. 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28) and maxillary palpus with five palpomeres. Females: basitibial plate with a concavity in the lower half of the primary plate (Fig. 35) (except in C. muralis Fig. 37), with secondary plate fused with the primary plate, evidenced by a convexity on the upper half (lateral view). Males: preapical surface of gonocoxite with a papillate projection (Fig. 38).