Hypseloecus sericosagus, Yasunaga, Tomohide, Yamada, Kazutaka & Artchawakom, Taksin, 2015

Yasunaga, Tomohide, Yamada, Kazutaka & Artchawakom, Taksin, 2015, First Indochinese records of the plant bug genus Hypseloecus Reuter (Hemiptera: Heteroptera: Miridae: Phylinae: Pilophorini), with descriptions of eight new species from Thailand, Zootaxa 3925 (1), pp. 75-93 : 89

Hypseloecus sericosagus sp. nov.

( Figs. 5–7 , 9 A–B)

Diagnosis. Recognized by its generally fuscous, comparatively shiny body, with yellow appendages; dorsal vestiture pattern (rather uniformly distributed golden-brown setae and patchily distributed scalelike setae as in Fig. 9 B); triangular head ( Fig. 5 ); dark femora each with yellow apex; almost uniformly yellow tibiae; and peculiar form of endosoma ( Fig. 10 ). Similar endosomal shape is exhibited by an Australian H. paramyemi Schuh & Menard , from which H. sericosagus is easily distinguished by the much smaller size and fuscous general coloration.

Description. Male: COLORATION AND VESTITURE: Body generally fuscous; dorsal surface rather shining, with widely distributed, reclining, golden-brown setae and patchily distributed, silky scalelike setae. Head shiny chocolate brown; vertex somewhat paler along inner margin of eye. Antenna wholly yellowish brown. Labium shiny reddish brown. Pleura as in Fig. 6 ; ostiolar peritreme obscured anteriorly. Hemelytron and membrane as in Fig. 9 B; membrane dark grayish brown with pale veins and irregular spots. Coxae as in Table 1 . Leg whitish brown; all femora darkened with pale apices; all tibiae without spots or annulations. Abdomen shiny fuscous. STRUCTURE: Head narrow, triangular in frontal view; remaining structures as in generic description (see Schuh & Menard, 2011). Genitalia ( Fig. 10 ): Left paramere with rather developed hypophysis. Endosoma broad, Jshaped, arranging brush-like structures distal to secondary gonopore. Female. Similar coloration and structure to male.

Measurements. ♂/♀: Total body length 2.1/ 2.1−2.4; length from apex of clypeus to cuneal fracture 1.71/ 1.71; width of head across eyes 0.78/ 0.81−0.84; head height 0.49/ 0.58−0.60; width of vertex 0.36/ 0.41−0.43; lengths of antennal segments I −IV 0.23, 0.81, 0.46, 0.60/ 0.21−0.24, 0.78−0.81, 0.38−0.39, 0.49−0.50; basal width of pronotum 0.98/ 0.97−1.07; maximum width across hemelytron 1.20/ 1.20−1.32; and length of metatibia 1.20/ 1.16−1.32.

Etymology. From Latin, sericus (= silk) in combination with sagus (= wearing); for this new species seems to wear a glossy silk gown.

Biology. Three adults were collected on Scurrula sp. growing from Homonoia riparia Lour. , together with many individuals of H. castaneus and H. katrinae . But population density was much lower than the latter two at that moment.

Holotype. ♂, THAILAND: Nakhon Nayok: Sarika near Sarika Waterfall, 14˚18'32”N 101˚15'20”E ~ 14˚18'09”N 101˚15'38”E, on Scurrula sp., 22 Mar 2010, T. Yasunaga, K. Yamada ( AMNH _PBI 00380260) ( DOA).

Paratypes. THAILAND: Nakhon Nayok: 2♀, same data as for holotype ( AMNH _PBI 00380261) ( TYCN). Nakhon Ratchasima: 1♀, SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 25 Sep 2013, T. Yasunaga (00380262) ( TYCN).

Figures

FIGURE 5. Holotypes of Hypseloecus species, head in frontal view.

FIGURE 6. Holotypes of Hypseloecus species, pleura in left-lateral view, each including all coxae and scent efferent system.

FIGURE 7. Ventral habitus images of Hypseloecus species.

FIGURE 9. Habitus images of living adult individuals of Hypseloecus species and other related or similar appearing Miridae. A. H. sericosagus holotype male (Nakhon Nayok). B. H. sericosagus female (SERS). C. Coridromius testaceous of the subfamily Orthotylinae (SERS), a sample image for comparison. D. Male of a pilophorine, Aloea nairobi Schuh (at Nairobi National Museum, Kenya), associated only with Aloe monocots in the Ethiopian Region. E. Same, female.

FIGURE 10. Male genitalia of Hypseloecus sakaerat and H. sericosagus.