Hypseloecus fukutomii, Yasunaga & Duwal, 2025

Hypseloecus fukutomii sp. nov.

Figs. 2 View FIGURE 2 A−B, 3A−D, 6A−G, 9

Material examined. Holotype (♂), JAPAN: Ryukyus, Okinawa Prefecture, Ishigaki Island, Sakie, Mt. Yarabudake , 24°26'N 124°05'E, on Taxillus nigrans , 2 Dec 2023, H. Fukutomi ( NWHS) ( AMNH_PBI 00378809 ). GoogleMaps

Diagnosis. Currently known by a single male holotype specimen. Recognized readily by its ovoid body ( Fig. 2A View FIGURE 2 ); pale olive-brown dorsum without noticeable dark macula; pale brown basal part of antennomere II; widely whitish brown femora; and obscure spots at bases each tibial spines ( Fig. 2B View FIGURE 2 ). Based on the similarity in the male genitalia, this new species is most closely related to H. tamaderai sp. nov., from which H. fukutomii sp. nov. can be distinguished by the characters mentioned in the above key, more densely distributed, silvery, lanceolate setae on the thoracic pleura ( Fig. 6B View FIGURE 6 ), developed sub-lateral protuberance of the left paramere ( Fig. 3A View FIGURE 3 ), pointed apex of the right paramere ( Fig. 3B View FIGURE 3 ) and relatively narrower and longer median process of the vesica ( Fig. 3C View FIGURE 3 ).

Description. Male: Body oval; basic coloration pale olive brown; dorsum relatively shining, without dark or reddish macula ( Fig. 2A View FIGURE 2 ). Head pale olive brown; width of head across eyes 1.55 times greater than height. Antenna pale grayish brown; base and apex of segment I, apical 1/5 of II and entire III dark brown (segment IV missing); extreme bases of segments II and III white. Labium shiny chocolate brown, about as long as basal width of pronotum; apex reaching but not exceeding apex of mesocoxa; apical part of segment IV darker. Pronotum relatively shining, almost uniformly pale olive-brown; thoracic pleura shiny chocolate brown, with densely distributed, long, scale-like setae ( Fig. 6B View FIGURE 6 ); metathoracic scent efferent system creamy yellow, with narrow peritreme ( Fig. 6C View FIGURE 6 ). Hemelytron relatively shining, almost uniformly pale olive-brown; membrane pale smoky brown, semitransparent, with pale veins and spots. Coxae pale reddish brown, except for creamy yellow procoxa; legs pale grayish brown; each femur lacking noticeable macula or spot; each tibia with obscure, small spots at bases of spines, without dark annulations (or rings); meta-tarsomere III longer than II ( Fig. 6G View FIGURE 6 ); pretarsal structure as in Fig. 6F View FIGURE 6 . Abdomen shiny chestnut brown. Male genitalia ( Fig. 3 View FIGURE 3 A−D): left paramere with developed sub-lateral protuberance ( Fig. 3A View FIGURE 3 ); hypophysis of right paramere pointed ( Fig. 3B View FIGURE 3 ); vesical median process relatively long, narrow ( Fig. 3D View FIGURE 3 ). Female: Unknown.

Measurements. See Table 1 View TABLE 1 .

Etymology. Named after Mr. Hirokazu Fukutomi, who kindly provided invaluable specimen of this new species; a noun in the genitive case.

Biology. A single male adult of this new species was collected from Taxillus nigrans (Hayata) Danser , which is considered the breeding host. No other information is currently available.