Adelphocorisella sarika, Yasunaga & Shishido & Yamada, 2016

Yasunaga, Tomohide, Shishido, Takayuki & Yamada, Kazutaka, 2016, Two new species of the mirine plant bug genus Adelphocorisella (Insecta: Heteroptera: Miridae: Mirinae: Mirini) from central Thailand, Raffles Bulletin of Zoology 64, pp. 250-256 : 255-256

Adelphocorisella sarika , new species

( Figs. 1A, B , 2 B, C , 4 )

Material examined. Holotype: male, THAILAND: Nakhon Nayok, Sarika , N14°18’39” E101°18’00”, at light, coll. T. Yasunaga, K. Yamada, 16 June 2009 ( AMNH _ PBI 00380438 ) ( DOA) . Paratypes: THAILAND: 1 male, Nakhon Nayok, Sarika , N14°18’39” E101°18’00”, at light, coll. T . Yasunaga, 19 December 2010 (00380439) ( TYCN) ; 1 male, Nakhon Ratchasima, Wang Nam Khieo, Sakaerat Environmental Research Station ( SERS), N14°30’27” E101°55’39”, 410 m alt., UV light trap, coll. T. Yasunaga, K. Yamada, 12−14 June 2009 (00380440) ( TYCN) .

Diagnosis. Recognised by its smallest size among congeners; generally short antenna; chestnut brown, weakly mottled pronotum and hemelytron ( Fig. 1A, B ); long metatibia; sharply curved hypophysis of left paramere; triangular, apically pointed hypophysis of right paramere; and broad endosomal spiculum ( Fig. 4 ). A combination of these characters enables this new species to be distinguished from any other species of Adelphocorisella .

Description. Body elongate oval, nearly parallel-sided; dorsal surface chestnut brown, widely matte, with uniformly distributed, brown, simple setae and densely distributed, reclining silvery setae ( Fig. 1A, B ). Head reddish brown, mottled with yellow. Antenna yellowish brown; segment I with reddish brown spots. Labium shiny pale brown, reaching abdominal sternum VI; basal 2/3 of segment I and apical half of IV chocolate brown. Pronotum chestnut brown, weakly shining, slightly mottled anteriorly, with yellow posterior margin; collar reddish brown, matte, speckled with yellow spots; pleura reddish brown, mottled with yellow; ostiolar peritreme creamy yellow; scutellum chestnut brown, somewhat darkened posteriorly, sometimes with pale apex. Hemelytron matte, without significant mottled pattern; lateral margin of embolium narrowly yellow, speckled with red spots; cuneus yellow, with dark base and apex, speckled with red spots; membrane smoky brown, with irregular pale marks posterior to apex of cuneus; membrane vein usually tinged with red. Coxa and leg yellowish brown; procoxa widely reddish brown; meso- and metacoxae each with a reddish brown spot subbasally; all femora speckled with small, reddish brown spots; pro- and mesofemora sanguineous brown basally; metafemur widely chestnut brown dorsally ( Fig. 1A, B ), with a sanguineous stripe at basal 1/4 along anterior margin ( Fig. 2B, C ); tibial spines pale or reddish brown. Abdomen matte, yellowish brown, ventrally with a pair of reddish brown stripes (continuing from metacoxae to paired, lateral large marks on pygophore) and with scattered, red, small spots ( Fig. 2B ). Male genitalia ( Fig. 4 ): Left paramere rather long, with sharply curved hypophysis; right paramere short and broad, with triangular, pointed hypophysis. Apex of phallotheca narrowly keeled. Endosoma with clear sclerite ‘c’ (sclerite C sensu Malipatil & Chérot, 2002), and comparatively developed, weakly curved and apically tapered spiculum. Female: Unknown.

Measurements. Male: Total body length 3.9−4.3; width of head across eyes 0.88−0.94; width of vertex 0.24−0.27; lengths of antennal segments I−IV 0.61−0.64, 1.88−1.94, 1.61−1.72, 0.88−0.98; length of labium 1.96−2.06; basal width of pronotum 1.25−1.28; maximum width across hemelytron 1.49−1.55; and length of metafemur, tibia and tarsus 2.13−2.21, 3.18−3.26, 0.51−0.59.

Biology. Unknown; all available specimens were collected at light. Collection records suggest this mirid has two or more generations per year.

Etymology. Named for the type locality, Sarika in Nakhon Nayok Province.

Figures

Fig 4. Male genitalia of Adelphocorisella sarika, holotype.

Fig. 1. Habitus images of live individuals. A, Adelphocorisella sarika, male from Nakhon Nayok; B, ditto, from Nakhon Ratchasima; C, A. lespedezae, male from Nagasaki, Japan; D−F, A. adelphocoroides, holotype male; G, Adelphocoris triannulatus (Stål), male from Nagasaki; H, ditto, female from Nagasaki.

Fig. 2. Habitus images of dried specimens of Adelphocorisella spp. A, A. adelphocoroides, holotype male; B, A. sarika; C, dittos, lateral view.