Trichadenotecnum yatai Yoshizawa & Lienhard, 2014

Yoshizawa, Kazunori, Lienhard, Charles & Abd, Idris, 2014, Trichadenotecnum species from Peninsular Malaysia and Singapore (Insecta: Psocodea: ' Psocoptera': Psocidae), Zootaxa 3835 (4), pp. 469-500 : 476-478

Trichadenotecnum yatai Yoshizawa & Lienhard , sp.n.

( Figs 1F , 6 , 7 )

Holotype. Male, Malaysia, Gunung Jasar, Cameron Highland , Pahang, 9.iii.2003, K. Yoshizawa ( UKM).

Paratypes: Malaysia, 3 females, same data as holotype ( UKM) ; 1 male, Gunung Berembun, Cameron Highland , Pahang, 10.iii.2003, NT ( UKM) ; 1 male 3 females, type locality, 14.iii.2003, KY ( SEHU & MHNG) ; 1 male 2 females, same locality, 14.vii.2003, KY ( SEHU & MHNG) .

Description. Male. Head. Yellowish white in ground color; vertical markings blackish brown, each marking touching with neighbors; with pair of blackish brown markings anterior to vertical markings; orbital markings blackish brown; coronal suture black; epicranial suture blackish brown, laterally with brackish brown marking dorsally; frons with central pair of brown bands reaching to oceller region dorsally, and with lateral pair of blackish brown broader band not reaching to epicranial suture dorsally, central and lateral bands fused with each other ventrally; eye dark gray, IO/D = 0.8; ocelli white, ocellar field black; gena with transversal blackish brown band medially, ventral and eye margins blackish brown; postclypeus mostly blackish brown ventrally except ventrolateral corner white, dorsal region white with four rows of blackish brown spots; anteclypeus blackish brown. Antenna brown, scape and pedicel blackish brown. Mouthparts brown.

Thorax. Prothorax blackish brown. Mesonotum mostly brown, scutum with yellowish white bands along posterolateral margins of anterior lobe, at middle from anterior to posterior ends of scutum, and along anterior margin of lateral lobe. Metanotum brown, median part and anterior region of lateral lobe of scutum yellowish white. Meso- and metapleuron brown except membranous regions.

Legs. Mostly blackish brown, ventral surface of distal half of fore femur and tip of hind femur white, tibiae paler.

Forewing ( Fig. 1F ). Extensively and densely covered with tiny spots. Distal spot in cell a1 distinct, basal spots distinct. Opposing spots in cell r obscure. Basal band narrow and faint except for dark spots around Rs-M fusion, below M-Cu fork, and in posterior half of cell cup. Distal band faint. Spot on roof of cell m3 narrow but distinct. Submarginal spots distinct in cells r3 and r5, faint but visible in cells m1 and m2, obscure in other cells. Marginal clouds faint. Hindwing hyaline; veins brown.

Terminalia. 8th sternum with single sclerite completely fused with hypandrium posteriorly ( Fig. 6C ). Clunial arm directed posteroventrally in basal half, directed posteriorly and covered with denticles in distal half, apically pointed ( Fig. 6A ). Epiproct ( Fig. 6 AB) medially with conical projection directed posteriorly; epiproct lobe strongly expanded dorsally, three lobed. Paraproct ( Fig. 6A ) with tiny sclerite ventral to trichobothrial field; distal lobe rounded; distal process short, directed posteriorly. Hypandrium ( Fig. 6C ) symmetrical, triangular in overall shape, posterior region wrinkled; left and right processes closely associated, arising from posteromedian region and directed posteriorly, their ventral margin denticulated basally; median tongue broadened distally, with only slightly arched distal margin, ventral surface wrinkled. Phallosome ( Fig. 6D ) with denticulated distal margin concave medially, nearly parallel sided distally, strongly expanded laterally at basal 1/3 and narrowing to anterior tip, without distinct anterior process.

Measurements. B 1.7–2.0, Fw 2.7–2.9, Hw 2.0–2.2.

Female. General morphology almost as in male. IO/D = 1.7.

Genitalia. Egg guide ( Fig. 7A ) ventrally with longitudinal swelling basally, longer than basal width, slightly constricted at basal 1/4, distal margin slightly arched; body of subgenital plage widely membranous, sclerotized portion laterally expanded W-shaped, with denticulated tubercles posteriorly. Gonapophyses ( Fig. 7B ). Ventral valve long. Dorsal valve with long distal process. Posterior lobe of external valve small; internal lobe narrow. Spermapore plate ( Fig. 7C ) roughly triangular, pigmented portions at posterior tip and median region of anterior margin.

Measurements. B 1.9–2.0, Fw 2.8–2.9, Hw 2.0–2.1.

Etymology. The species epithet refers to Prof. Emer. Osamu Yata, who led the Tropical Asia Inventory Project.

Remarks. The female of this species is very similar to T. alobum Endang & New, 2005 described from Sumatra, Indonesia. However, the external valve of gonapophyses of T. alobum lacks the posterior lobe that is present in T. yatai ( Fig. 7B ). The hypandrial structures ( Fig. 6C ) and the long ventral valve of gonapophyses ( Fig. 7B ) suggest close relationship between this species and T. ianobidens Yoshizawa & Lienhard, 2004 , the male of which was originally described as the male of T. bidens Thornton, 1961 but later recognized as a different species.

Figures

FIGURE 1.1. Forewings of Trichadenotecnum spp.: A: T. circularoides, female; B: T. cinnamonum, male; C: ditto, female; D: T. imrum, male; E: T.pardus, female; F: T. yatai, holotype male; G: T. kojimai, holotype male; H: T. adika, male; I: T. endangae, holotype male; J: T. hammani, female; K: T. sp.My19, female; L: T. gombakense, female; M: T. malayense, male.

FIGURE 6. Male terminalia of Trichadenotecnum yatai. A: terminalia, lateral view; B: epiproct, dorsal view; C: hypandrium, ventral view; D: phallosome, ventral view.

FIGURE 7. Female genitalia of Trichadenotecnum yatai, ventral view. A: subgenital plate; B: gonapophyses; C: spermapore plate.