Carvalhoiella nitida La Rivers

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 : 585

Carvalhoiella nitida La Rivers

( Figs. 19–25 , 32 )

Carvalhoiella nitida La Rivers, 1976: 6 –7.

Discussion. This species was described based only on one male specimen from Suriname and the only reference to structures specific to males was that the accessory genitalic process of tergum VI is absent ( La Rivers 1976). Here we provided a suite of characters not mentioned in the original description, including the description of the female.

Additional characters. Dorsal coloration brown, with lateral margins of pronotum, anterolateral corners of scutellum, anterior 2/3 of embolium and exposed connexiva yellow ( Fig. 19 ). A small whitish spot between outer margin of corium and posterior region of embolium. Pronotum with row of distinct rounded punctations on anterior margin of posterior transverse band. Ventral coloration brown with scattered yellow areas ( Fig. 20 ). Meso- and metatibiae with stout reddish brown spines slightly more stout than in congeners, 2 transverse rows of stout spines at apex. Medial lobes of tergum VIII with posterior margin straight and apex slightly rounded ( Fig. 22 ). Parameres ovate ( Fig. 23 ). Phallosoma with pair of ventral lobes, both unarmed and each with small projection medially ( Fig. 24 ).

Macropterous female. (n =1) Length 9.12; maximum width 5.60. Similar to macropterous male in general structure and coloration except as follows: Subgenital plate (mediosternite VII) wider than long, length at midline 1.04, maximum width 1.24, posterior margin truncate to slightly convex ( Fig. 25 ).

Diagnosis and comparative notes. Carvalhoiella nitida can be distinguished from its congeners by the smaller size (male 8.50–8.80, mean = 8.64/ female 9.12) and the dorsal surface of the body is shiny and with few punctures.

Distribution. This species was known only from the record of the original description in southern Suriname ( La Rivers 1976). Here we examined specimens from Kasikasima, Suriname, near the type locality, and one male from El Tobogán de la Selva in the northern portion of the state of Amazonas, Venezuela, which represents the first record of this species from this country ( Fig. 32 ). This species is the only member of the genus occurring in the northern region of South America.

Material examined. All specimens macropterous. VENEZUELA, T.F. Amazonas: 1♂ ( EMEC), Dpto Atures, 40 km SE Puerto Ayacucho, Caño Coromoto at El Tobogan, 24.I.1989, upper stream leaf packs, C.B. Barr col. SURINAME, Sipaliwini: 2♂, 1♀ (UMC), Kasikasima, 2.976883, -55.411385, 400 m, seepage area, 24.III.2012, SR 12-0324-01C, A.E.Z. Short col.

Figures

FIGURE 32. Distribution records of all species of Carvalhoiella.

FIGURES 19 – 25. Carvalhoiella nitida. (19) Dorsal and (20) ventral habitus, (21) terga VI and VII of male, (22) tergum VIII of male with medial lobes (= pseudoparameres), (23) genital capsule of male showing pygophore, phallosoma, and parameres, (24) ventral side of phallosoma, (25) terminal abdominal sterna of female. Size bar = 0.5 mm and pertains only to Figs. 23, 24.