Carvalhoiella beckeri De Carlo

Rodrigues, Higor D. D., Sites, Robert W. & Giehl, Nubia F. S., 2016, Revision of the Neotropical genus Carvalhoiella De Carlo (Heteroptera: Nepomorpha: Naucoridae), Zootaxa 4138 (3), pp. 577-590 : 581

Carvalhoiella beckeri De Carlo

( Figs. 7–12 , 32 )

Carvalhoiella beckeri De Carlo, 1963: 11 .

Discussion. Carvalhoiella beckeri is the type species of the genus and only the female has been described. The female subgenital plate varies intraspecifically and can be almost straight or broadly convex ( Fig. 9 ).

Macropterous male. (n = 2) Length 9.44–9.76 (mean = 9.60); maximum width 6.24–6.56 (mean = 6.40). Similar to macropterous female in general structure and coloration, except as follows: Tergum V asymmetrical, with concavity of posterior margin slightly displaced to left. Tergum VI asymmetrical with concavity larger on right lateral margin, without accessory genitalic process or posterior protuberance. Medial lobes of tergum VIII directed posterolaterally, with broadly acuminate apices ( Fig. 10 ). Parameres symmetrical, with lightly concave anterior margin. Pygophore with anterior margin between parameres rounded ( Fig. 11 ). Phallosoma elongate, ventrally with pair of sclerotized lobes, both with posterior margin rounded, unarmed with teeth and subequal in size ( Fig. 12 ).

Diagnosis and comparative notes. The yellow ventral color pattern and the darker marking on the metapleuron are diagnostic ( Fig. 8 ). The female subgenital plate posterior margin is almost straight or convex ( Fig. 9 ). The medial lobes of male tergum VIII are directed posterolaterally and the apices are broadly acuminate ( Fig. 10 ). It is most similar to C. helenae sp. nov. because both species have yellow ventral body coloration and the medial lobes of male tergum VIII are acuminate. However, C. beckeri can be differentiated by the posterior margin of the female subgenital plate straight or convex, the dark marking on the metapleuron, and the medial lobes of male tergum VIII are more broadly acuminate and directed posterolaterally; whereas in C. helenae sp. nov. the posterior margin of the female subgenital plate is distinctly concave ( Fig. 15 ), the metapleuron is yellow ( Fig. 14 ), and the medial lobes of male tergum VIII are more narrowly acuminate and directed laterally ( Fig. 16 ).

Distribution. We report the first records of this species from the state of Mato Grosso, in central-western Brazil. The previous records, including the type locality, are from the state of Minas Gerais, southeastern Brazil ( Fig. 32 ) ( De Carlo 1963; Vianna & Melo 2003).

Type material examined. Holotype, macropterous ♀ ( MNRJ), BRAZIL, Minas Gerais, Carmo do Rio Claro, I.1958, Carvalho & Becker col., D.Z. 53/ 62.

Additional material examined. All specimens macropterous. BRAZIL, Mato Grosso: 1♂, 1♀ ( MZUSP), Córrego Duílio, upstream, 14°48’19.3”S / 52°30’10.9”W, 24.IX.2010, H. Cabette et al. col.; 1♂ ( CZNX), same data, except 01.V.2011; 1♀ ( CZNX), Córrego Chupador, downstream, 14°50’9.5”S / 52°30’2.9”W, 28.IV.2011, H. Cabette et al. col. Minas Gerais: 2♀ (UMC), Brumadinho County, Retiro dos Pedras, 20°04‘S, 44°00‘W, 15 km S of Belo Horizonte, ~ 1450 m, 14 March 1999, G.J.C. Vianna.

Figures

FIGURE 32. Distribution records of all species of Carvalhoiella.

FIGURES 7 – 12. Carvalhoiella beckeri. (7) Dorsal and (8) ventral habitus of female, (9) terminal abdominal sterna of female, (10) terminal abdominal terga of male (genital capsule removed), (11) genital capsule of male showing pygophore, phallosoma, and parameres, (12) ventral side of phallosoma. Size bar = 0.5 mm and pertains only to Figs. 11, 12.

FIGURES 13 – 18. Carvalhoiella helenae sp. nov. (13) Dorsal and (14) ventral habitus of holotype, (15) terminal abdominal sterna of holotype, (16) terminal abdominal terga of male paratype (genital capsule removed), (17) genital capsule of male showing pygophore, phallosoma, and parameres, (18) ventral side of phallosoma. Size bar = 0.5 mm and pertains only to Figs. 17, 18.