Corixidea quilombola Albuquerque & Carvalho-Filho, 2021

Albuquerque, Flavio, De-Souza, Caroline Costa, Favacho, César Augusto Chaves & Carvalho-Filho, Fernando Da Silva, 2021, Minute litter bugs (Heteroptera: Schizopteridae) from the Brazilian Amazon savannas, a poorly sampled biome, Zootaxa 4958 (1), pp. 252-260 : 256

Corixidea quilombola Albuquerque & Carvalho-Filho , sp. nov.

( Figs 2 , 3B )

urn:lsid:zoobank.org:act:4C91FD12-1D93-4B2E-A359-292C39467E8A

Type material: HOLOTYPE ♂ labelled as follow: Macapá , Amapá, Brasil [= Brazil] / Quilombo Mel da Pedreira / área de savana [savanna environment] / 15.VI.2019 / leg. F.S. Carvalho-Filho / Armadilha luminosa [= light trap] ( MPEG).

Measurements: Male Holotype. Total length: 1.15 mm; width between eyes: 0.30 mm; pronotum length: 0.18 mm; pronotum width: 0.49 mm; scutellum length: 0.14 mm; abdominal width: 0.52 mm.

Diagnosis. Recognized among species of Corixidea by the uniformly dark coloration, macropterous forewing without a pale band ( Figure 2 ), mediotergite 8 asymmetrical, with process insertion on the left side ( Figure 3B ), process of mediotergite 8 anteriorly directed, composed of an elongate projection mostly covered with many small pointed projections and a widened triangular plate-like base ( Figure 3B ); right paramere elongate and narrowed, strongly arched, bearing a small claw-like projection and a cluster of four small fine setae on the tip ( Figure 3B ).

Description. Male ( Figure 2 ): macropterous, body elongate-oval. Coloration: general coloration dark brown and costal area of the forewing dark brown to black, remainder of wing dark brown, antenna and legs uniformly yellow, abdomen dark brown. Surface and vestiture: head, pronotum, and wing veins with medium-length light brown setae, abdomen densely covered with elongate, light brown setae. Structure: Head: rounded in ventral view, width of eye about 1/3 width of synthlipsis, ocellus about the same size to one ommatidium, placed close to the lateral margin of compound eye. Thorax: pronotum trapezoidal, with posterior margin slightly concave medially, scutellum triangular, with a rounded tip, hind coxa with well-developed adhesive pad, tarsal formula 3- 3-3. Abdomen: with six visible sterna corresponding to segments 2+3, 4, 5, 6, 7, and pygophore. Mediotergite 8 asymmetrical, with process insertion on the left side. Process of mediotergite 8 anteriorly directed, composed of an elongate projection mostly covered with many small pointed projections and a widened triangular plate-like base. Genitalia ( Figure 3B ): Pygophore asymmetrical and almost triangular. Left paramere triangular and plate-like. Right paramere elongate and narrowed, strongly arched, bearing a small claw-like projection and a cluster of four small fine setae on the tip. Aedeagus long and thin, without processes. Anophoric process absent.

Etymology. The specific epithet quilombola refers to people who inhabit quilombo communities. Quilombos are Black rural communities made by the descendants of African-American slaves, who live, in their majority, from subsistence agriculture. They are founded mainly during colonial Portuguese rule in Brazil (between 1530 and 1815) by escaped slaves. This species’ name is indeclinable.

Distribution. Brazil (Amapá).

Remarks. This new species is similar to Corixidea underwoodii Emsley, 1969 from Trinidad & Tobago in having a very long and anteriorly directed process of mediotergite 8. However, in C. quilombola sp. nov., the process of mediotergite 8 is mostly covered with many small pointed projections, while in C. underwoodii it bears tiny setulae on the tip and basally. These species belong to one of the two subgroups of the crassa species group because they have an anteriorly directed process of tergum 8 ( Knyshov et al. 2019).

Figures

FIGURE 2. Habitus of Corixidea graziae sp. nov., Corixidea quilombola sp. nov., and Schizoptera (Cantharocoris) savannensis sp. nov. in dorsal, ventral, and lateral views. Scale bars: 0.5 mm.

FIGURE 3. Male genitalic features. A. Corixidea graziae sp. nov. B. Corixidea quilombola sp. nov. C–D. Schizoptera (Cantharocoris) savannensis sp. nov. C. Ventral view of abdominal apex; black arrow points to posterior process of sternum 6 and white arrow points to lateral process of subgenital plate. D. Dorsal view. Abbreviations: lca = left conjunctival appendage, lp = left paramere, rca = right conjunctival appendage, rp = right paramere, st6 = sternum 6, st7 = sternum 7 (subgenital plate), mt8 = mediotergite 8, mt8p = mediotergite 8 process, py = pygophore, v = vesica. Scale bars: A–B = 0.1 mm, B–C = 0.05 mm.