Guayascoris, Carpintero & Dellapé, 2012

Carpintero, Diego Leonardo & Dellapé, Pablo Matías, 2012, Neotropical Scolopini (Hemiptera: Heteroptera: Anthocoridae): new taxa, diagnostic characters and a key to the genera of the tribe, Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 49-66 : 56-57

Guayascoris gen. nov.

( Figs. 3 , 10–15 )

Type species. Guayascoris foreroi sp. nov., here designated.

Diagnosis. Ant-mimetic shape, with lateral margins of hemelytra 3-sinuate. Ostiolar peritreme short, wide, slightly curved forward (nearly straight), apically rounded; left paramere biapiculate, pygophore with secretory teeth.

Description. Male. Head ( Fig. 10 ): Slightly longer than wide, shining on basal half. Eyes large, occupying 2/3 of head length, with transversal sulcus across basal line of eyes. Head covered with long and erect hairs; with three pairs of long setae: on subapical portion of tylus, and on subapical and basal inner margin of eyes. Antennae slender, terete, segment II widened on apical half. Rostrum nearly surpassing mid coxae. Pronotum: lateral margins nearly straight, carinated, with a long seta on small concavity between anterior and posterior lobes. Anterior lobe prominent, shiny, smooth, with short pilosity, and two subapical long, erect setae. Posterior lobe flat, shiny (opaque on margins), with small punctures and two lateral and subbasal setae. Scutellum opaque with small punctures (as on posterior lobe) and two mesolateral erect setae. All femora enlarged. Fore femora unarmed. Fore coxae and trochanters with row of small teeth and spines. Fore tibiae ( Fig. 11 ) with row of teeth and long, stout setae (like spines) on inner margin. Fossula spongiosa developed on apex of fore tibiae. Mid and hind tibiae with short hairs and long, stout setae, longer than width of tibiae. Hemelytra ( Fig. 12 ) sparsely covered with short decumbent and sparse hairs, 3-sinuated laterally: near base, at apex of exocorium, and near apex of cuneus. Clavus and cuneus opaque; corium shiny, with row of thick punctures on inner margin, and 3 or 4 irregular ones externally; with row of punctures on inner margin of endocorium and some at apex. Cuneus with some small punctures on inner half. Ostiolar peritreme short, wide, slightly curved forward (nearly straight), apically rounded. Metasternum sulcated medially and acute apically. Abdomen: With typical uradenia ( Fig. 13 ), ending on sternites III–V, as in remaining genera of this tribe. Pygophore ( Fig. 14 ) subtriangular, with some very long apical hairs. Left paramere thick, biapiculate, with deep median sulcus. Area contiguous to paramere with numerous secretory teeth.

Female. Anterior tibiae without fossula spongiosa or teeth, but with row of stout spine-like setae on inner margin. Row of small teeth and spines on fore coxae and trochanters present. Abdomen a little more constricted at base than in male. Ectospermalege ( Fig. 15 ) not shaped as copulatory tube.

Differential diagnosis. This genus is similar to Opisthypselus , also an ant-mimetic genus, but differs by ostiolar peritreme shorter and slightly curved forward, the dorsal half of the metapleura sculptured, not smooth, and by armed legs. Guayascoris gen. nov. also differs from Opisthypselus by the more constricted pronotum in middle and shorter head and legs. Small teeth and spines present on fore coxae and trochanters are probably related to a stridulatory function.

Etymology. The generic name is a compound word consisting of the name of the Ecuadorian province where the specimens were collected – Guayas, and of the Greek term for true bug – coris. The gender is masculine.

Figures

Figs. 1–9. 1 – Calliodis pallescens (Reuter, 1884); 2 – Eulasiocolpus megalops Champion, 1900; 3 – Guayascoris foreroi gen. & sp. nov.; 4 – Lepidonannella opaca (Poppius, 1909); 5 – Nidicola mitra Drake & Herring, 1964; 6 – Opisthypselus punctaticollis Reuter, 1908; 7 – Zopherocoris armatus (Stål, 1860); 8 – Scolopella brasiliensis Carayon, 1954; 9 – Scolopocoris gracilicornis (Poppius, 1909). Scale bars = 1 mm.

Figs. 10–15. Guayascoris foreroi gen.& sp. nov.10–14 – holotype, male: 10 – head; 11 – fore tibia; 12 – hemelytron; 13 – abdominal uradenia; 14a – pygophore; 14b – detail of left paramere. 15 – paratype, female, abdomen.