Brincadorus Oman , 1938

Camisão, Beatriz M., Zahniser, James N. & Takiya, Daniela M., 2024, On the Neotropical Brincadorus: redescription, new species, taxonomic key and description of a related new genus (Insecta: Hemiptera: Cicadellidae: Deltocephalinae), Zootaxa 5497 (4), pp. 537-558 : 539-540

Brincadorus Oman, 1938

( Figures 1–8 )

Additional literature citations:

Evans, 1947: 219 (classification). Oman, 1938: 361 (generic description). Linnavuori, 1959: 158 (revision of Neotropical Deltocephalinae ). Metcalf, 1966: 183 (catalogue). Zanol & Menezes, 1982: 38 (catalogue). Oman et al., 1990: 196 (catalogue). Zahniser, 2007 (on-line catalogue). Zanol, 2008: 14 (catalogue). Zahniser & Dietrich 2013: 49 (phylogeny of Deltocephalinae and description of tribe). Cao et al. 2022 (phylogeny of Deltocephalinae ).

Type-species: Brincadorus laticeps Oman, 1938.

Length: 5.0– 7.4 mm.

Coloration: Body mostly yellow dorsally and ventrally.

External morphology: Head short, crown not produced anteriorly, transocular width more than two times width of eye; transocular width subequal to pronotum width; coronal suture visible; crown surface smooth; frontal region flat or convex; anterior margin with numerous transverse fine carinae ( Fig. 3 ); transition from crown to face angled; lateral frontal suture reaching only partway to ocellus; ocellus medium sized, on anterior margin of head, close to eye, distance between ocellus and eye more than twice the diameter of ocellus; eye with mesal margin entire. Antennal ledges present, weakly developed. Clypellar suture complete; straight or arcuate. Clypellus tumid in lateral view, slightly constricted at base and narrowing toward apex, or not constricted at base and tapering apically, apex following natural curve of gena. Gena incised laterally; single fine erect seta close to lateral frontal suture present. Lorum narrower than clypellus near base, close to lower genal margin. Frontoclypeus shagreen, shorter than wide.

Pronotum with transverse ridges and furrows, with distinct lateral carina. Scutellum not inflated.

Forewing rounded apically; macropterous; with or without crossveins on costal margin; outer anteapical cell truncate; inner anteapical cell open; corium with or without extra crossveins; vein R 1 diverging distad of R fork; with crossvein between A1 vein and claval suture; without crossvein between veins A1 and A2; appendix restricted to anal margin.

Profemur with AM 1 and intercalary row of setae present; row AV with short or long macrosetae reaching midlength of profemur; with 2 apical setae. Protibia anterodorsal margin rounded. Mesofemur row AV with short, stout macrosetae, AV apical setae present. Metafemur setal formula 2+2+1. Metatarsomere I longer than metatarsomeres II and III combined; pecten with three platellate setae; PV apical seta acuminate.

Male genitalia: Pygofer incised to near mid-length; without developed rows of macrosetae; dorsal process present, thick at base, constricted medially, apically bifurcate with short, blunt dorsal rami and with longer, falcate ventral rami; posterior margin truncate. Valve subtriangular, articulated with pygofer. Subgenital plate triangular, articulated with valve; outer lateral margin slightly convex in ventral view; inner margin excavated medially; plates widely separated and extending dorsad along pygofer side; apex acuminate or bifurcate; without developed macrosetae. Connective articulated to aedeagus; arms appressed anteriorly or slightly divergent, stem longer or shorter than arms. Style preapical lobe absent; apophysis shorter than rest of style; reaching or not reaching apex of connective. Aedeagus with or without basidorsal and apical processes; gonopore subapical or apical. Phragma forming pair of membranous or partly sclerotized processes extending over aedeagal shaft, with setae dorsally. Segment X sclerotized.

Female terminalia: Pygofer with macrosetae near posterior margin. Internal abdominal sternite VIII membranous. Valvulae I convex ventrally; shaft with dorsal sculpturing pattern imbricate with individual scales arranged in more or less even, oblique rows. Valvulae II with numerous close-set subtriangular teeth on dorsal margin beyond membranous notch, each bearing small denticles on the anterior and posterior margin. Gonoplacs with apex rounded, with small setae on ventral margin.

Diagnosis: The genus can be distinguished by its larger size (5.0 to 7.4 mm), short head, transition of crown to face angled, anterior margin of head with numerous transverse carinae, male pygofer and subgenital plate without macrosetae, male pygofer with a pair of internal processes arising dorsally, subgenital plates rising dorsad along pygofer side and with internal margin excavated medially, and unique shape of styles, with long anterior arm.

Notes: Oman (1938) treated the genus as a member of the subfamily Aphrodinae , and regarded it as related to Stroggylocephalus Flor, 1861 , a genus recorded from the Old World. Evans (1947) placed the genus in the tribe Selenocephalini , which belonged to the subfamily Iassinae at the time. Linnavuori (1959) correctly included Brincadorus in Deltocephalinae , due to the male genital structure. Zahniser & Dietrich (2013) included the genus in Bahitini , but it is here considered unplaced to tribe (see Discussion).

List and distribution of species of Brincadorus

Brincadorus cruceno sp. nov. Bolivia: José Ballivián and Santa Cruz Departments; Peru: Huánuco and San Martín Regions.

Brincadorus gracilis sp. nov. Ecuador: Sucumbíos Province; Peru: Huánuco Region.

Brincadorus laticeps Oman, 1938. Brazil: Mato Grosso (see the notes section below).

Brincadorus limoncocha sp. nov. Ecuador: Sucumbíos Province.

Brincadorus quincemil sp. nov. Peru: Cusco Region.

Brincadorus yanayacu sp. nov. Ecuador: Tungurahia and Sucumbíos Province.

Brincadorus sp. (unidentified female). Brazil: Rio de Janeiro State.

Taxonomic key to males of Brincadorus

1 Aedeagus without basidorsal process ( Fig. 1G ).............................................................. 2

- Aedeagus with basidorsal process ( Figs. 4F , 5H )............................................................. 4

2(1) Aedeagus shaft short and slightly expanded at midlength, becoming narrower towards apex in lateral view ( Figs. 7F–G )...................................................................................... Brincadorus yanayacu

- Aedeagus shaft long and slender, without expansions in lateral view ( Figs. 1G–H , 2F–G )............................ 3

3(2) Aedeagus with pre–apical spine dorsally, apical region curved downward ( Figs. 2F–G ).............. Brincadorus cruceno

- Aedeagus without pre–apical spine dorsally, apical region somewhat straight ( Figs. 1G–H )........... Brincadorus laticeps

4(1) Aedeagus with basidorsal process strongly bifurcate; without apical process ( Figs. 5H–I .......... Brincadorus limoncocha

- Aedeagus with basidorsal process not bifurcate; with flap–like apical process ( Figs. 4F–G , 6F–G )..................... 5

5(4) Subgenital plate apex bifurcate ( Fig. 6D ); aedeagus with wide apical extension; basidorsal process with rami short ( Figs. 6F–G )............................................................................. Brincadorus quincemil

- Subgenital plate apex not bifurcate ( Fig. 5D ); aedeagus with basidorsal processes longer and slender ( Figs. 4F–G )............................................................................................ Brincadorus gracilis

Figures

FIGURE 1. Brincadorus laticeps Oman, 1938. A–C, I, male holotype, USNMENT01513019. D–G, male paratype, USNMENT01513139. A, Dorsal habitus; B, Head, frontal view; C, Abdomen, ventral view; D, Pygofer, valve and subgenital plates, lateral view; E, Pygofer, valve and subgenital plates, dorsal view; F, Connective, styles and aedeagus, ventral view; G, Connective, styles and aedeagus, lateral view; H, Aedeagus apex, lateral view; I, Holotype labels.

FIGURE 2. Brincadorus cruceno sp. nov. A–B, USNMENT01513497. C–F, USNMENT01513074. H, USNMENT01513046. A, Dorsal habitus; B, Lateral habitus; C, Pygofer,valve, subgenital plates andanal tube, lateral view; D, Pygofer, valve, subgenital plates and anal tube, ventral view; E, Connective, styles and aedeagus, ventral view; F, Connective, styles and aedeagus, lateral view; G, Apex of aedeagus, lateral view; H, Holotype labels.

FIGURE 3. Brincadorus cruceno sp. nov. A–D, SEM images, USNMENT01513497. E–G, USNMENT01513074. A, Head, pronotum, and part of mesonotum, dorsal view (scale bar 0.5 mm); B, Detail of head and pronotum, dorsal view (scale bar 0.25 mm); C, Face, ventral view (scale bar 0.5 mm); D, Detail of antennal ledges and anterior margin of frontoclypeus, ventral view (scale bar 0.15 mm); E, Genital capsule (connective, styles and aedeagus removed), caudal view; F, Dorsal part of genital capsule, caudolateral view; G, Same, lateral view.

FIGURE 4. Brincadorus gracilis sp. nov., male holotype.A, Dorsal habitus; B, Lateral habitus; C, Pygofer and anal tube, lateral view; D, Valve and subgenital plate, ventral view; E, Connective and style, dorsal view; F, Aedeagus, lateral view; G, Aedeagus, ventral view.

FIGURE 5. Brincadorus limoncocha sp. nov., male holotype, USNMENT01513043. A, Dorsal habitus; B, Lateral habitus; C, Pygofer, valve, subgenital plates and anal tube, lateral view; D, Apex of pygofer, lateral view; E, Pygofer, valve, subgenital plates and anal tube, ventral view; F, Connective, styles and basal portion of aedeagus, ventral view; G, Connective, styles and basal portion of aedeagus, lateral view; H, Aedeagus, lateral view; I: Aedeagus, ventral view; J, Holotype labels.

FIGURE 6. Brincadorus quincemil sp. nov., male holotype. A, Dorsal habitus; B, Lateral habitus; C, Pygofer and anal tube, lateral view; D, Valve and subgenital plate, ventral view; E, Connective and styles, dorsal view; F, Aedeagus, lateral view; G, Aedeagus, ventral view.

FIGURE 7. Brincadorus yanayacu sp. nov., male holotype. A, Dorsal habitus; B, Lateral habitus; C, Pygofer, valve, subgenital plate, connective, styles, aedeagus and anal tube, lateral view; D, Pygofer, valve, subgenital plate, connective, styles, aedeagus and anal tube, ventral view; E, Connective, styles, and aedeagus, dorsal view; F, Connective, styles, and aedeagus, lateral view; G, Aedeagus, lateral view.

FIGURE 8. Brincadorus sp., female, UNSMENT01513834. A, Dorsal habitus; B, Abdominal sternite VI, VII and pygofer, ventral view; C, Valvifer I and valvulae I, lateral view; D, Apex of Valvula I, lateral view; E, Valvifer II and valvulae II, lateral view; F, Valvulae II, lateral view; G, Dorsal teeth of valvula II, lateral view; H, Gonoplacs, lateral view; I, Labels