Illustrated key to the species in the genus Laminiceps Costa, 1863 (Hemiptera: Heteroptera: Coreidae: Acanthocephalini), with descriptions of twelve new species Author Brailovsky, Harry 0000-0001-7456-5678 Instituto de Biología, Universidad Nacional Autónoma de México, apdo postal 70153, Ciudad de México 04510, México. & coreidae @ ib. unam. mx; https: // orcid. org / 0000 - 0001 - 7456 - 5678 coreidae@ib.unam.mx Author Barrera, Ernesto 0000-0001-8276-2553 Instituto de Biología, Universidad Nacional Autónoma de México, apdo postal 70153, Ciudad de México 04510, México. & ernesto. barrera @ ib. unam. mx; https: // orcid. org / 0000 - 0001 - 8276 - 2553 ernesto.barrera@ib.unam.mx text Zootaxa 2023 2023-10-03 5352 2 177 202 http://dx.doi.org/10.11646/zootaxa.5352.2.2 journal article 272021 10.11646/zootaxa.5352.2.2 7d8204b7-a7d1-418a-8007-f44170153435 1175-5326 10130075 35D80A5A-C1E0-427C-9636-87790E1253FF Laminiceps gelidus sp. nov. ( Figs. 28 , 55 , 84 , 95–96 ) Type locality. Brazil , Corumba (Matto Grosso) . Description. Holotype male. Dorsal coloration. Head black with bluish green reflections; tylus yellow; antennal segments I–IV black; pronotum dark brown with bluish green reflections; collar and anterior half of the anterolateral borders yellow; scutellum black with bluish green reflections, apex yellow; clavus and corium black with bluish green reflections; hemelytral membrane dark brown; connexival segments and dorsal abdominal segments black. Ventral coloration. Head yellow with the area behind eyes brown; buccula yellow; rostral segments I–IV brown; thorax yellow; supracoxal spine, meta-acetabulae and broad mark near inner margin of mesopleura black with bluish green reflections; coxae and trochanters yellow; fore and middle femora black with bluish green reflections; hind femora with anterior half yellow and posterior half including the spines black with bluish green reflections; tibiae and tarsi dark brown; abdominal sterna III–VII yellow; pleural margins of abdominal sterna III–VII and genital capsule black with bluish green reflections. Structure. Head. Antennal segment III uniformly elongate, relatively robust; rostrum reaching posterior border of mesosternum. Thorax. Pronotum. Trapeziform; anterolateral and posterolateral margins almost smooth; posterior border straight; humeral angles subacute, not exposed. Genital capsule. Posteroventral border slightly convex ( Fig. 84 ). Parameres. Figs. (95–96). Measurements. Male. Body length 17.65; head length 1.73; head width across eyes 2.74; interocular distance 1.17; interocellar distance 0.49; preocular distance 0.95; length antennal segments I 3.72, II 3.22, III 1.98, IV 6.07; length rostral segments, I 1.33, II 1.57, III 1.24, IV 1.05; pronotum total length 3.90; maximum width across humeral angles 6.38; scutellum length 2.94, width 1.75. Female. Unknown. Type material. HOLOTYPE male: BRAZIL : Corumba, Matto Grosso, whithout date ( H. G. Barber , colln. 1950) ( USNM ). Etymology. From the Latin “ gelidus ” meaning cold, frosty, icy. Discussion. Differential diagnosis. Like L. eustoliana ( Figs. 29 , 56 ), here described with scutellum black with bluish green reflections, and apex yellow; clavus and corium black with bluish green reflections; tylus and buccula yellow; antennal segments I–IV black; supracoxal spine black to dark brown with bluish green reflections; abdominal sterna III–VII yellow; male genital capsule black with bluish green reflections; and antennal segment III uniformly elongate. In L. eustoliana , the hind femora are yellow with apical border and spines black; pronotum black with bluish green reflections, with collar, callar region, most of anterior pronotal disk, and anterolateral borders yellow (humeri black with bluish green reflections); pleural margin of abdominal sterna III yellow, and IV–VII yellow with apical border dark brown. In L. gelidus sp. nov. , ( Figs. 28 , 55 ), the hind femora have the anterior half yellow, and posterior half including the spines black; pronotum black with bluish green reflections and only collar and anterior half of anterior border yellow; and pleural margins of abdominal sterna III–VII black with bluish green reflections.