Hypseloecus siamensis, 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 : 89-92

Hypseloecus siamensis sp. nov.

( Figs. 2 A, 5–7)

Diagnosis. Recognized by the following combination of characters: medium-sized body; fuscous dorsum ( Fig. 2 A); yellowish brown, broad head ( Fig. 5 ); grayish yellow, slender antenna; and identical color patterns of coxae ( Fig. 6 ) and femora ( Fig. 7 ). Most closely related to H. phuvasae , from which this new species can be distinguished by the pale antennal segments I and II, longer labium, dark metacoxa with whitish base, and different shape of ostiolar peritreme ( Table 1 ).

Description. Female. COLORATION AND VESTITURE: Body generally fuscous, dorsal surface less shining, with densely distributed, reclining, silvery scalelike setae. Head yellowish brown, less shining; clypeus and surroundings darkened. Antenna grayish yellow; segment I with an obscure spot ventrally. Labium shiny reddish brown. Pleura dark, except for ostiolar peritreme yellowish white ( Fig. 6 ); scutellum somewhat paler along lateral margin. Hemelytron dark, mat; cuneus tinged with red; membrane smoky brown, with pale veins and irregular spots. Coxae as in Table 1 . Leg pale brown; basal half of profemur, basal 2/3 of mesofemur, and basal 1/3 and apical 1/6 of metafemur chocolate brown; pale parts of femora with reticular, pale red maculae; all tibiae with reddish brown annulations. Abdomen shiny fuscous. STRUCTURE: Body medium sized, rounded; head broad; labium long; remaining structures as in generic description (see Schuh & Menard, 2011). Male. Unknown.

Measurements. ♀: Total body length 2.69; length from apex of clypeus to cuneal fracture 2.09; width of head across eyes 1.01; head height 0.62; width of vertex 0.48; lengths of antennal segments I −IV 0.20, 0.87, 0.51, 0.55; basal width of pronotum 1.23; maximum width across hemelytron 1.56; and length of metatibia 1.39.

Etymology. Named for its occurrence in the Siamese nation, or Thailand.

Biology. A single female was recently found from inflorescence of Scurrula sp. ( Loranthaceae ) parasitizing Ficus sp. ( Moraceae ) ( Fig. 1 A).

Holotype. ♀, THAILAND: Nakhon Nayok: Sarika near Nangrong Waterfall along stream, 14˚19'39.5”N 101˚19'07.4”E, on flower of Scurrula sp., 3 Nov 2014, T. Yasunaga ( AMNH _PBI 00380263) ( DOA).

Figures

FIGURE 1. Hosts and habitats of Hypseloecus. A. Sarika near Nangrong Waterfall, Nakhon Nayok Province, Thailand. B. Sarika near Sarika Waterfall.

FIGURE 2. Habitus images of living adult individuals of Hypseloecus species. A. H. siamensis holotype female on Scurrula sp. 1. B. H. castaneus female (SERS). C. H. castaneus male (missing scalelike setae, Nakhon Nayok). D. H. katrinae male (Nakhon Nayok). E. H. nigrobrevis holotype female (SERS).

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.