Alkindus crassicosta Horvath 1919
Creators: name: Matesco, Viviana Cauduro
name: Grazia, Jocelia
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Alkindus
Alkindus crassicosta

description: Alkindus crassicosta Horvath, 1919
(Figs. 1–4, 7, 8, 11, 12, 15, 16, 21–23, 27, 28, 31)
Type locality: São Paulo, Brazil.
Alkindus crassicosta Horvath, 1919: 232; McAtee & Malloch 1933: 349–350 (redescription); Grazia et al. 1999: 108 (list); Grazia & Schwertner 2011: 12 (list); Klein et al. 2013: 242 (distribution record).
Diagnosis. Head (Figs. 2, 7). Ocelli nearer eyes than to middle of vertex; head posterior to ocelli about 1.6 times the diameter of ocelli.
Pronotum. Lateral punctate area proportionally smaller than in A. atratus. Callus inconspicuously rastrate. Hemelytra (Figs. 3, 8). Subcostal smooth area of corium broader than in A. atratus; largest width at median third. Exocorial vein with internal and external branches subparallel, closer to each other than in A. atratus. Abdominal venter (Figs. 11, 15). Sternite VII on average 0.8 and 1.0 times the length of segments III–VI in female and male, respectively; anterior margin of sternite VII broadly rounded in female and narrowly rounded to slightly angulate in male, posterior margin broadly rounded in male and angulate and ventrally projected at middle in female. Lateral bristles absent. Based solely on the absence of such bristles, the specimens of A. crassicosta would key to the genus Pericrepis, because McAtee & Malloch (1933) mistakenly consider the presence of lateral bristles as characteristic of the genus Alkindus.
Male genitalia (Figs. 15, 16, 31). Ventral exposure of pygophore shorter than in A. atratus, about 0.2 times the length of urosternite VII, punctate, with median transverse striations. Ventral rim broadly concave, almost subrectilinear at median 3/5, not covering the proctiger.
Measurements (n=5). Total length 4.1 (3.0–4.6) ± 0.6; head length 0.8 (0.8–0.9) ± 0.1, width 1.9 (1.8–1.9) ± 0.0; eye width 0.3 ± 0.0; interocular distance 1.3 (1.3–1.4) ± 0.0; anteocular length 0.3 (0.3–0.4) ± 0.0; length of antennal segments: I—0.4 ± 0.0; II —0.1 (0.1–0.2) ± 0.0; III—0.2 (0.2–0.3) ± 0.0; IV—0.3 (0.3–0.4) ± 0.0; V—0.4 (0.4–0.5) ± 0.0; pronotal length 1.4 (1.3–1.4) ± 0.0, width 2.9 (2.8–3.0) ± 0.1; scutellar length 2.7 (2.5–3.0) ± 0.2, width 2.3 (2.3–2.4) ± 0.0; abdominal width 2.7 (2.6–2.9) ± 0.1; corium length 1.9 (1.7–2.2) ± 0.2; rostrum length 1.5 (1.5–1.7) ± 0.1.
Female genitalia (Figs. 11, 12). Gonocoxites 8 more elongate than in A. atratus; mesial margins strongly projected ventrally, especially at anterior and median third, projection evanescent posteriorly; mesial margins about 1.1 times the length of abdominal sternite VII at midline and 1.4 times the length of posterior margins of gonocoxites 8.
Measurements (n=2). Total length 4.8 (4.7–4.8) ± 0.1; head length 0.9 (0.9–1.0) ± 0.1, width 2.0 ± 0.0; eye width 0.3 ± 0.0; interocular distance 1.5 ± 0.0; anteocular length 0.4 ± 0.0; length of antennal segments: I—0.5 ± 0.0; II—0.2 ± 0.0; III—0.3 ± 0.0; IV— 0.4; V—0.5; pronotal length 1.5 (1.4–1.5) ± 0.1, width 3.1 ± 0.0; scutellar length 3.0 (2.9–3.0) ± 0.1, width 2.6 ± 0.0; abdominal width 2.9 (2.9–3.0) ± 0.1; corium length 2.2 (2.2–2.3) ± 0.0; rostrum length 1.7 (1.6–1.8) ± 0.1.
Distribution. Brazil (States of São Paulo, Santa Catarina, and Rio Grande do Sul). Provinces 51 and 53, according to Morrone (2006) (Fig. 32).
Type material (photographs examined). Holotype ♀. Labels: 1) Brasilia, S. Paulo; 2) crassicosta det. Horvath (HNHM).
Material examined. BRAZIL, Santa Catarina: Maracajá, 1 ♂, 21-X-2005, Bertolin, T. col. (UFRG); Rio Grande do Sul: Triunfo, 1 ♂, 20/X/1977, H. A. Gastal leg. (MCNZ); Eldorado do Sul, 3 ♂, 12.05.2010, Joana Klein col. (UFRG); Barra do Quaraí, Fazenda Espinilho, 2 ♀, 1ª varredura, campo, 10/I/2004, Bunde; Schwertner cols. (UFRG).
description: Published as part of Matesco, Viviana Cauduro & Grazia, Jocelia, 2013, Revision of the genus Alkindus Distant (Hemiptera: Heteroptera: Thyreocoridae: Corimelaeninae), pp. 57-70 in Zootaxa 3750 (1) on pages 67-68, DOI: 10.11646/zootaxa.3750.1.4, http://zenodo.org/record/285339