Hypseloecus castaneus, 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 : 80-81

Hypseloecus castaneus sp. nov.

( Figs. 2 B–C, 3, 5–7)

Diagnosis. Distinguished from other congeners by its brown to castaneous body often tinged with red; broad head, with reddish striae on frons ( Fig. 5 ); and color pattern of coxae ( Fig. 6 , Table 1 ).

Description. Male. COLORATION AND VESTITURE: Body generally pale brown, often partly tinged with orange-red or maroon; dorsal surface brown to castaneous, with densely distributed, reclining scalelike setae. Head pale brown, rather shining, with red striae on frons; clypeus with sanguineous stripes laterally. Antenna uniformly pale or yellowish brown; segment I sometimes tinged with red. Labium shiny pale brown. Pronotum usually chestnut brown; pleura as in Fig. 6 ; ostiolar peritreme yellowish white. Hemelytron brown or chestnut brown; membrane grayish brown, with pale veins and irregular, pale, semitransparent portion at middle. Coxae as in Table 1 . Leg whitish or yellowish brown; each femur mottled with red-orange maculae; all tibiae with obscure, reddish brown annulations. Abdomen pale to reddish brown. STRUCTURE: As in generic description (see Schuh & Menard, 2011). Genitalia ( Fig. 3 ): Endosoma J-shaped, with a median process. Female. Similar coloration and structure to male.

Measurements. ♂/♀: Total body length 2.2−2.4/ 2.3−3.1; length from apex of clypeus to cuneal fracture 1.74−2.00/ 1.90−2.30; width of head across eyes 0.91−1.05/ 0.94−1.08; head height 0.60−0.64/ 0.62−0.64; width of vertex 0.49−0.51/ 0.51−0.60; lengths of antennal segments I −IV 0.19−0.24, 0.73−0.90, 0.36−0.39, 0.38−0.50/ 0.20−0.24, 0.72−0.96, 0.39−0.44, 0.42−0.54; basal width of pronotum 1.08−1.19/ 1.08−1.31; maximum width across hemelytron 1.21−1.44/ 1.33−1.59; and length of metatibia 1.20−1.42/ 1.20−1.56.

Etymology. From Latin, castaneus (= chestnut or castaneous brown), referring to the general coloration of this new species.

Biology. Confirmed host is Scurrula species growing from Homonoia riparia Lour.

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 00380215) ( DOA).

Paratypes. THAILAND: Nakhon Nayok: 17♂ 6♀, same data as for holotype, except for date 31 May 2012 ( AMNH _PBI 00380216–00380225) ( AMNH, TYCN); 14♂ 23♀, same data without USI label ( TYCN). Nakhon Ratchasima: 1♀, SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 16 Sep 2008, T. Yasunaga (00380226) ( TYCN); 1♀, same locality,, light trap, 28 Oct 2008, T. Yasunaga, K. Yamada (00380227) ( TYCN); 1♀, same locality, light trap, 29−31 May 2012, T. Yasunaga (00380228) ( TYCN); 1♂ 3♀, light trap, 21 Mar 2014, T. Yasunaga, K. Yamada ( AMNH _PBI 00380229–00380231) ( TYCN). Chaiyaphum: 2♀, Chulabhom Dam, 16˚32−33'N, 101˚38−39'E, 760−780 m, 16−18 Apr 2013, T. Yasunaga, A. Wolski (00380232) ( TYCN).

Coloration of antenna Ostiolar Coloration of lateral sides of coxae Labial apex

segmet I segment II peritreme procoxa mesocoxa metacoxa

Figures

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 3. Male genitalia of Hypseloecus castaneus.

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.