Aridocoris guidonae, Miranda & López & Carrenho & Schwertner, 2025

Miranda, Alexandre M., López, Guilherme E. L., Carrenho, Renan & Schwertner, Cristiano F., 2025, Checklist of the Stink Bugs (Hemiptera: Pentatomidae) from the Caatinga region, with the description of Aridocoris guidonae gen. and sp. nov., Zootaxa 5711 (3), pp. 301-340 : 313-314

Aridocoris guidonae Miranda, López & Schwertner sp. nov. ( Figs. 3–4 )

Type locality. Brazil, Piauí, Guaribas , SCNP, 9°18'19.3"S, 43°55'28"W .

Type material. Holotype: ♀ (MZSPHEM0011700). Brazil: Piauí — Guaribas, SCNP, Torre de Rádio ; 9°18'19.3"S, 43°55'28"W; 18/II/2020; Sweep net; Dias J leg.

Etymology. The species is dedicated to Dr. Niède Guidon, retired researcher from the FUNDHAM (Fundação Museu do Homem Americano, São Raimundo Nonato, Piauí State, Brazil), as a tribute to her valuable contributions to the knowledge and preservation of the Archaeological Sites in the Southeast of Piauí State, and her efforts in the protection of natural and cultural heritage of the region, located very close to where the new species was collected, in the Serra das Confusões National Park.

Diagnosis.The species can be recognized by mesial portion of urosternite VII with a dark brown patch and the valvifers VIII (vf8) posterior margin sinuous and mesial margins carinated.

Description (female). General morphology and coloration. Ovoid, medium-sized (total body length 9 mm). Dorsal color dark brown mottled with lighter areas, dense scattered dark brown punctures ( Fig. 1A ), ventrally light brown with many dark brown punctures ( Fig. 1B ); punctures forming two visible sublateral longitudinal stripes in urosternites II–VI; bearing sparse, small and thin setae along the whole body. Dark brown patch on mesial portion of urosternites II–III and on anterior portion of urosternite IV. Urosternite VII with a dark brown patch on the mesial portion. Reddish marks on lateral margins of each sternite ( Fig. 1C ).

External female genitalia ( Figs. 3C–D ). Valvifers VIII (vf8) subquadrate, longer than wide, posterior margins sinuous, surface with a small concavity near mesial margins, mesial margins carinate. Valvifers IX (vf9) barely visible, covered by the valvifers VIII.

Measurements. Female (n = 1, in mm): total length 9.20; width of abdomen at segment III 5.50; head length 1.80; head width across eyes 2.55; interocular distance 1.50; interocellar distance 0.95; lengths of antennal segments: I 0.55, II 0.80, III 0.80, IV 1.25, V 0.75; labial segments lengths: I 1.20, II 1.50, III 0.80, IV 0.80; pronotum length along midline 1.96; pronotum width at humeral angles 5.46; scutellum length along midline 4.76; scutellum width at base 3.65.

Male. Unknown.

Distribution. A— Piauí.

Figures

FIGURE 1. A. Brazilian biomes: Amazon in dark green, Atlantic Rain Forest in light green, Caatinga in brown, Cerrado in purple, Pampa in light brown and Pantanal in yellow. B. Detailed map of the Caatinga region and location of the four Federal Conservation units (CUs) studied:Aiuaba Ecological Station (AES) in blue, Catimbau National Park (CNP) in orange, Chapada Diamantina National Park (CDNP) in red, and Serra das Confusões National Park (SCNP) in grey (MMA 2017; ICMBio 2021b).

FIGURE 3. Aridocoris guidonae gen. and sp. nov., diagnostic characters. A. Head, dorsal view. B. Head, lateral view. Scale bars: 1.5 mm. C. Female genital plates, posterior view. D. Female genital plates, ventral view. Scale bars: 1 mm. Lettering: buc—buccula; clp—clypeus; lt8—laterotergites VIII; lt9—laterotergites IX; mp—mandibular plates; ps—preocular spine; vf8—valvifers VIII; vf9—valvifers IX; X—segment X.

FIGURE 4. Habitus of the endemic stink bugs (Pentatomidae) of the Caatinga. A, C, E, G. Dorsal View. B, D, F. Ventral view. A, B. Chinavia cearensis; C, D. Diceraeus caatinguensis; E, F. Tetragonotum megacephalum; G. Thoreyella paraiba. Scale bars: 5 mm.