Cachiporra extremaglobosa Chamorro & Konstantinov

Chamorro, Maria Lourdes & Konstantinov, Alexander S., 2011, Cachiporrini, a remarkable new tribe of Lamprosomatinae (Coleoptera, Chrysomelidae) from South America, ZooKeys 78, pp. 43-60 : 50-51

Cachiporra extremaglobosa Chamorro & Konstantinov sp. n. Figs 111522

Type locality.

Brazil, Rio Grande do Norte, Natal.

Description.

Length 1.81-1.85 mm. Color black, with bluish and bronzish tint. Head with frons and vertex shagreened, covered by sparse, sharply defined punctures.

Pronotum strongly shagreened, evenly covered with sharply impressed small punctures, each bearing a single, small seta. Diameter of punctures four to ten times smaller than distance between them.

Elytral surface strongly shagreened, with numerous wrinkles, some of which short and placed diagonally, some exceptionally long and stretched from base of elytron to and beyond middle. Punctures with tendency to form rows.

Female genitalia. Median side of the lateral sclerotization of tergite IX strongly oblique. Stylus attached slightly anteriorly from apex. Receptacle of spermatheca slightly longer than pump, slightly S-shaped with small bump near base and apically. Apex of spermathecal pump bulbous, wider than receptacle and base of pump.

Material examined.

Holotype, female: 1) Brazil RG Norte, Papari: III. 1952. M. Alvarengo; 2) F. Monrós Collection, 1959; 3) Holotype Cachiporra extremaglobosa Chamorro & Konstantinov, des. 2010 (NMNH).

Paratype, female: 1) Brazil Natal, R.G. Norte, 24.IX. 1951. M. Alvarengo; 2) F. Monrós Collection, 1959; 3) Paratype Cachiporra extremaglobosa Chamorro & Konstantinov, des. 2010 (NMNH).

Etymology.

Named for the extremely globular antennal club (capitulum). The epithet is treated as a noun in apposition.

Discussion.

Unique features of Cachiporrini include the following: antenomeres 7-11 fused into a tight capitulum (2:0); explanation of lateral margin of pronotum situated ventrally essentially covered from above by expansion of upper side of pronotum laterally (5:1); pronotal and elytral punctures with setae (15:0); wings with RA 3+4 absent (18:1); absence of sclerotized rim of kotpresse (23:1); and stylus of female genitalia longer than wide.

Among various lamprosomatine genera, Cachiporra is superficially most similar in color, size, wing venation, and overall body shape to Oomorphus . The pronotum of Cachiporra is considerably different from that of Oomorphus and all other lamprosomatines in having the sides swollen and bent ventrally so that the lateral border is not visible from above. The lateral border is therefore located very close to the posterior margin of the prosternum, leaving hypomera extremely thin and limiting the intercoxal prosternal process to the shape of a small triangle. In Oomorphus the sides of the pronotum are not bent ventrally and the hypomera and the prosternum itself occupy most of the ventral side of the lateral part of prothorax. Furthermore, dorsally the pronotum in Cachiporra is basally sinuate and medially extending posterad beyond elytral base (Fig. 15) and side of elytron have an extended lobe directed ventrad nearly concealing all of metepisternite (Fig. 11).

Cachiporra has a number of pleisiomorphies also present in African Neochlamysini . These are absence of a stridulatory device (also absent in Sphaerocharini ), entire eyes, completely exposed pygidium, and free and simple claws.

Synapomorphies of Lamprosomatinae (Fig. 29) include the loss of canthus of the eye, character 1 state 1 (1:1); antennomeres 6-8 strongly transverse, more than twice as wide as long, 3:0; triangular scutellum, 8:1; smooth elytra, 12:1; tarsal claws simple and free, 16:1; and have CuA 3+4 and spurt RP distant from each other, 19:1. Of the four tribes, Lamprosomatini has the greatest support with at least four synapomorphies and a number of homoplasious character states (Figs 29-31). Sides of elytra extended in wide relatively short lobe, not concealing much of metepisternite (character 11:1) (Fig. 12) supports the monophyly of Neochlamysini under slow optimization (Fig. 30). The transformation of the sides of elytra into a narrow lobe concealing nearly all posterior part of metepisternite (character 11:2) (Fig. 13) is a shared derived feature of Sphaerocharini + Lamprosomatini (Fig. 30) under slow optimization. In Cachiporrini this lobe is wide and long concealing most of middle to posterior part of metepisternite (character 11:0) (Fig. 11); a unique feature of this tribe.