Trigava brachycephala (Melichar, 1912)

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 brachycephala (Melichar, 1912)

Figs 1A, B , 2A, B, G , 3A-J

Igava brachycephala Melichar, 1912: 49, pl. II, figs 9, 11.

Igava brachycephala Melichar: Metcalf (1946): 39.

Trigava brachycephala (Melichar): O’Brien (1999): 60.

Type locality.

Peru, Department of Cuzco, Quispicanchi Province, Marcapata.

Emended description.

Measurements (in mm; 3♂, 1♀). Body length from apex of head to tip of tegmina: ♂ 10.8-11.1, ♀ 11.7; head length (includes: apex of cephalic process to constricted and curved part + from curved part to base of eyes): ♂♀ (0.2-0.3)+(0.6-0.7); head width including eyes: ♂ 1.4-1.5, ♀ 1.6; tegmen length: ♂ 9.0-9.3, ♀ 9.6.

Coloration. Head stramineous green, apical spot between intermediate carinae of frons black, intermediate carinae of frons reddish brown, lateral areas of head green. Pronotum and mesonotum stramineous green, upper lateral carinae of pronotum green. Tegmina and hindwings membrane hyaline, veins green to greenish yellow, pterostigmal area more or less greenish ochraceous. Legs yellowish brown, base, apex and apical spines of tibiae fuscous. Abdomen dorsally and ventrally greenish ochraceous.

Structure. Head with cephalic process very short, in lateral view (Fig. 3B ), strongly curved upward about 90° (or more than 90° in lectotype, Fig. 2A ) in front of eyes. Vertex (Fig. 3A ) broad, with ratio of length at midline to width between eyes (0.9-1.0):1. Frons (Fig. 3C ) flat, relatively broad, with ratio of length at midline to maximum width 2.0:1, intermediate and median carinae obscure.

Male genitalia. Pygofer in lateral view (Fig. 3E ) with ratio of ventral to dorsal width about 2.5:1; posterior margin produced angulately near middle. Gonostyles (Fig. 3F ) large and broad, dorsal process short, acute apically, more or less incurved and directed dorsoanteriad; hook-like process situated submedially, distinctly elevated above dorsal process, curved basad (Fig. 3G ). Aedeagus (Fig. 3H-J ) elongate, endosomal processes curved dorsoanteriad; phallobase sclerotized and pigmented at lateral sides, membranous and slightly inflated dorsally and ventrally: dorsal lobes V-shaped at apex, directed posteriad; a pair of lateral lobes large and elongate, base conical, directed anterolaterad, mostly tapering apicad, apex with a large long spine, directed posteriad; ventral lobes small, butterfly-shaped, base expanded laterad, with a minute tooth, apex produced in a pair of short and stout lobes, without spine, directed laterad. Segment X (Fig. 3D, E ), in dorsal view, lateral margins more or less convex near middle, with ratio of length to width near middle about 2.0:1.

Female genitalia. As in generic description.

Type material examined.

Lectotype (here designated), ♂, (1) "Peru, Marcapata"; (2) " Enh. brachycephala [ Melichar’s handwriting], det. Melichar"; (3) “Typus” [dark red label]; (4) "Collectio Dr. L. Melichar, Moravské museum Brno"; (5) "Syntypus, Igava brachycephala sp.n. Melichar, 1912, ♂ [P. Lauterer’s handwriting], P. Lauterer det. 1991"; (7) "Syn- typus" [red label]; (7) "Invent. č. 4941/Ent., Mor. muzeum, Brno"; (8) " Trigava brachycephala [Zhi-Shun Song’s handwriting] det. Z.S. Song 2014"; (9) "Lectotypus ♂, Igava brachycephala Melichar, 1912, designated by Z.S. Song & I. Malenovský, 2023" [newly added red label] (MMBC; dry-mounted, glued on a rectangular card label, abdomen detached, macerated, preserved in glycerol and enclosed in a glass microvial placed on the same pin as the specimen). Paralectotype, 1♂, (1) "Peru S, Marcapata, Garlepp c."; (2) "Coll. A. Jacobi, 1912 - 3" [green label]; (3) " Trigava brachycephala " [handwriting]; (4) " Igava Mel. " [handwriting]; (5) "Paralectotypus ♂, Igava brachycephala Melichar, 1912, labelled by I. Malenovský, 2023" [newly added red label] (MTD).

Other material examined.

Peru: 1♂, "Peru, S.V. Garlepp "; " Igava brachycephala Mel. [H. Synave’s handwriting], H. Synave det., 1969" (MFNB) ; 1♂, 1♀, “Peru” (MTD).

Distribution.

Southeastern Peru.

Remarks.

Melichar (1912) described Igava brachycephala Melichar based on material from "Peru, Marcapata (Garlepp) (Mus. Budapest, Dresden)". He did not state the number of the specimens he used for the description nor did he designate a holotype. One of his syntypes has been preserved in Melichar’s personal collection in MMBC and we used this male specimen for the redescription of the species. According to Article 74 of ICZN (1999), we designate the specimen in MMBC as the lectotype for I. brachycephala to stabilize the nomenclature. Another conspecific male with collecting data fully matching the original description has been located by us in MTD and was labelled by us as a paralectotype.

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 3. Trigava brachycephala (Melichar), 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.