Illustrated key to the genera included in the tribe Acanthocephalini (Hemiptera Heteroptera: Coreidae: Coreinae), with descriptions of three new genera, seven new species, new taxonomic rearrangements, and a key to genera of Placoscelini Author Brailovsky, Harry text Zootaxa 2021 2021-12-21 5082 5 457 475 journal article 2716 10.11646/zootaxa.5082.5.4 3fa676b0-872a-41c6-85ea-dacfab4e216a 1175-5326 5794957 D46E05BA-53A9-4284-984D-F85477D1998C Anomalopetalops ariquemesus sp. nov. ( Figs. 1 , 25–26 , 38 ) Type locality. Brazil , Rondonia . Description. Holotype male. Dorsal coloration. Head including neck black, space between eye and ocellus and narrow longitudinal stripe running between ocelli to the base of post-tylar sulcus, antenniferous tubercles and tylus yellowish orange; antenal segments I–IV pale orange; pronotum pale castaneous orange with collar and few scattered punctures tinged with metallic bluish green reflections; spine projection of humeral angles reddish brown; scutellum shiny brick red, lateral margins and apex, yellow and middle third with dark yellow longitudinal stripe reaching the apex; scutellar disc scattered with metalic bluish green reflections; clavus and corium shiny brick red scattered with metalic bluish green reflections; claval and corial veins, costal and apical margin and apical angle yellow; hemelytral membrane black; connexival segments III–VII yellow; posterior angle of segments V–VI with the spine reddish brown; dorsal abdominal segments brick red with median pale yellow longitudinal fascia, running from III to basal third of VII. Ventral coloration. Head including the buccula yellow to pale castaneous orange; rostral segment I yellow with inner surface brown; segments II–IV yellow; thoracic sterna brick red; pleura pale castaneous orange with acetabulae, posterior angle of mesopleura and metapleura with metallic bluish green reflections; metathoracic peritreme basally yellow with auricles black; fore and mid legs with coxae and trochanters shiny brick red, femora yellow with spines reddish brown and tibiae and tarsi yellow; hind leg with coxae and trochanters shiny brick red, femora ventrally pale reddish orange and dorsally shiny brick red; tibiae shiny orange, spines darker and apical third yellow; tarsi yellow; abdominal sterna III–VII shiny brick red; pleural margins pale yellow; genital capsule reddish brown. Variation. Hind tibiae entirely shiny orange with darker spines. Female. Unknown. Measurements. Male. Body length 15.97; head length 1.90; head width across eyes 2.05; interocular width 0.76; anteocular length 0.84; interocellar width 0.31; length of antennal segments: I 2.58, II 3.04 III, 2.50, IV 6. 61; length of rostral segments: I 1.35, II 1.35, III 1.70, IV 1.20; pronotum: total length 2.88, maximum width across humeral angles 4.86; scutellum: length 2.05, basal width 1.74. Type material. HOLOTYPE : Male : BRAZIL : Rondonia , 62 km SW Ariquemes , nr. Fzda Rancho Grande , at black Light trap , 4–16–xi–1997 , J. E. Eger ( UNAM ) . PARATYPE : BRAZIL : Rondonia , 62 km SW nr. Fzda Rancho Grande (without date), U. Schmitz ( UNAM ) 1 male . Etymology. This species is named for its occurrence in Ariquemes ( Rondônia ) in Brazil . Differential diagnosis. Similar to A. brulei ( Fig. 2 ), described herein, with antennal segments I–IV pale castaneous orange to pale orange, metathoracic peritreme with auricles black, humeral angles with median size spine directed outward and backward, male connexival segments pale yellow and abdominal segments III–VII shiny brick red with median pale yellow longitudinal fascia running from III to basal third of VII segment. In A. brulei the pronotal disc, clavus, and corium are densely tinged with metallic bluish green reflections, the antenniferous tubercles are black, and the hind femora basally shiny brick red to reddish orange. This species is recorded from French Guiana . In A. ariquemesus sp. nov. , ( Fig. 1 ), the antenniferous tubercles are yellowish orange, the pronotal disc pale castaneous orange scattered with bluish green reflections, the clavus and corium not densely covered with bluish green reflections, and the hind femora basally with inner face pale yellow. This species is known from Brazil .