Trigava peruensis Song, O'Brien & Bartlett, 2024

Song, Zhi-Shun, O'Brien, Lois B., Malenovsky, Igor, Deckert, Juergen & Bartlett, Charles R., 2024, Revision of the Neotropical genus Trigava O'Brien, 1999 (Hemiptera, Fulgoromorpha, Dictyopharidae, Nersiini), with descriptions of two new species from Peru and Brazil, ZooKeys 1188, pp. 27-45 : 27

Trigava peruensis Song, O'Brien & Bartlett sp. nov.

Figs 1E , 2E , 6A-J

Type locality.

Peru, Department of Cuzco, Cosñipata Valley.

Type material.

Holotype ♂, Peru: "Peru, Dep Cuzco, Cosnipata-Ebene, 1000 m, XI-XII-[19]00, S.V. Garlepp leg." (MFNB; dry-mounted, pinned).

Diagnosis.

Trigava peruensis sp. nov. is externally similar to T. brachycephala , but can be separated from the latter by the gonostyles with the dorsal process elongate and the hook-like process placed more basally and curved apicad (dorsal process short and hook-like process placed submedially and curved basad in T. brachycephala ), and the ventral lobes of the aedeagus with long spines (without long spines in T. brachycephala ). It can be distinguished from T. recurva by the shorter cephalic process curved upward about 90° in front of the eyes (the longer head curved upward about 60° in front of eyes in T. recurva ) and the ventral lobes of the aedeagus weakly trilobed (nearly cross-shaped in T. recurva ).

Description.

Measurements (in mm; 1♂). Body length from apex of head to tip of tegmina: 11.7; head length (includes: apex of cephalic process to constricted and curved part + from curved part to base of eyes): 0.3+1.1; head width including eyes: 1.6; tegmen length: 9.7.

Coloration. Head stramineous green, lateral carinae of vertex and frons reddish brown, intermediate carinae of frons in front of eyes black to reddish brown, lateral areas in front of eyes green. Pronotum and mesonotum stramineous green, upper lateral carinae of pronotum green. Tegmina and hindwings with membrane hyaline, costal margin dark brown, veins green to greenish yellow, pterostigmal area greenish ochraceous. Legs yellowish brown, base, apex and apical spines of tibiae fuscous. Abdomen dorsally and ventrally greenish ochraceous.

Structure. Head with cephalic process short, in lateral view (Fig. 6B ), curved upward nearly 90° in front of eyes. Vertex (Fig. 6A ) broad, with ratio of length at midline to width between eyes (1.1-1.2):1. Frons (Fig. 6C ) flat, relatively broad, with ratio of length at midline to maximum width 2.2:1, intermediate and median carinae obscure.

Male genitalia. Pygofer in lateral view (Fig. 6E ) with ratio of ventral to dorsal width about 2.0:1; posterior margin produced angulately near middle. Gonostyles (Fig. 6F ) large and broad, dorsal process elongate, triangular, acute apically, more or less incurved and directed dorsoanteriad; hook-like process placed sub-basally, below dorsal process, curved apicad (Fig. 6G ). Aedeagus (Fig. 6H-J ) large and stout, endosomal processes curved dorsoanteriad; phallobase sclerotized and pigmented at lateral sides, membranous and slightly inflated dorsally and ventrally: dorsal lobes small, V-shaped at apex, directed posteriad; a pair of lateral lobes large and elongate, thumb-like, tapering apicad, apex with a large long spine, directed posterolaterad; ventral lobes large, weakly trilobed, base protruded laterad, with a large long spine, apex produced in a long triangular lobe, without spine, directed posteriad. Segment X (Fig. 6D, E ), in dorsal view, with lateral margins more or less convex near middle, with ratio of length to width near middle about 2.1:1.

Female. Unknown.

Etymology.

The new species is named for its occurrence in Peru. The specific epithet ' Trigava peruensis ' is to be treated as a Latinized adjective in nominative singular.

Distribution.

Southeastern Peru.

Figures

Figure 1. Habitus of Trigava species, dorsal view A T. brachycephala (Melichar), lectotype, male B T. brachycephala (Melichar), male C T. obrieni sp. nov., holotype, male D T. obrieni sp. nov., paratype, female E T. peruensis sp. nov., holotype, male F T. recurva (Melichar), lectotype, male.

Figure 2. Habitus of Trigava species, lateral view A T. brachycephala (Melichar), lectotype, male B T. brachycephala (Melichar), male C T. obrieni sp. nov., holotype, male D T. obrieni sp. nov., paratype, female E T. peruensis sp. nov., holotype, male F T. recurva (Melichar), lectotype, male G right tegmen of T. brachycephala H right tegmen of T. recurva.

Figure 6. Trigava peruensis sp. nov., holotype, male A head and thorax, dorsal view B same, lateral view C same, ventral view D pygofer and segment X, dorsal view E pygofer, gonostyles, aedeagus and segment X, right lateral view F pygofer and gonostyles, ventral view G left gonostyle, lateral view H aedeagus, dorsal view I aedeagus, lateral view J aedeagus, ventral view.