Cuyabasa minor (Bechyné, 1955)

Roie, Martijn Van, D’Hont, Anouk, Konstantinov, Alexander & Furth, David, 2023, Types of Cuyabasa Bechyné, Palmaraltica Bechyné and Rhynchasphaera Bechyné (Coleoptera: Chrysomelidae: Galerucinae: Alticini: Oedionychina) of the Naturhistorisches Museum, Basel, with keys to species and descriptions of genitalia, and new combinations for species transferred to the oedionychine, Zootaxa 5318 (1), pp. 67-82 : 71-72

Cuyabasa minor (Bechyné, 1955)

( Figure 3 )

Wanderbiltiana minor Bechyné 1955a:9 ( Brasil, Est. Minas Gérais: Uberaba , holotype sex unknown).

Cuyabasa minor: Bechyné 1959:347 .

Measurements. LB = 4.70 mm; WB = 2.91 mm (N=1)

Distribution. Brasil (states of Minas Gerais and S„o Paulo), Paraguay.

Type examined. Paratype: Brésil-Uberaba Minas Gerais, P-Type Wanderbiltiana minor ns. J. Bechyné det., 1954 (1 female NMB)

Additional material examined. Brésil-Uberaba Minas Gerais (2 females NMB); Brésil-Uberaba Etat de Minas Gerais (1 male 1 female NMB); Estancia Postillon Puerto Max a. Rio Paraguay, N.-Paraguay, Louis Des Arts Jr. leg. (1 female NMB) .

Literature records. BRASIL: Est. Minas Gerais: Uberaba ( Bechyné 1955a, as Wanderbiltiana ). Minas Gerais: Lagoa Santa, I. 1954 (B. Silva, coll. M. Alvarenga) ( Bechyné 1959). PARAGUAY: Paraguay, Río Paraguay : Estancia Postillon, Puerto Max (Louis Des Arts Jr., Mus. G. Frey) ( Bechyné 1959).

Description of genitalia. Aedeagus ( Figure 3E ) rhomboid at apex; lamellate projection visible in ventral and dorsal views; maximum width situated at about distal fifth, followed by constriction, thereafter widening apically. In lateral view, nearly straight, about equally wide throughout length. Apical denticle flattened, slightly curved in lateral view. Ventral surface smooth, with apex slightly wrinkled. Apical opening with two C-shaped sclerites situated anterolaterally.

Spermathecal pump ( Figure 3F ) arched, rounded, about half as long as receptacle, forming a bend so that midline of pump is about perpendicular to midline of receptacle. Apex flattened, evenly rounded, short, about one-fourth length of pump in lateral view, curved slightly downwards. Receptacle cup-shaped, with maximum width situated near spermathecal pump, forming collar. Receptacle with slight constriction situated at about middle of receptacle. Canal attached slightly above base of receptacle.

Diagnosis. Cuyabasa minor can be separated from both C. gastrophysoides and C. chiquitoensis by the black coloration of the head, underside, scutellum and appendages ( Figure 3 ), and by the frontal ridge that does not reach the antennal sockets ( Figure 3C ). Cuyabasa minor differs also from C. chiquitoensis by the apex of the aedeagus bearing a lamelliform protrusion ( Figure 3D ) and from C. gastrophysoides by having a more elongate spermathecal receptacle with a constriction near the middle ( Figure 3F ).

Figures

FIGURE 3. Paratype of Cuyabasa minor (Bechyné) from the NMB. A. Dorsal view; B. Lateral view; C. Frontal view; D. Label; E. Aedeagus; F. Spermatheca. Scale bar: 1 mm.