Trichadenotecnum cinnamonum Endang & New, 2005

Yoshizawa, Kazunori, Lienhard, Charles & Abd, Idris, 2014, Trichadenotecnum species from Peninsular Malaysia and Singapore (Insecta: Psocodea: ' Psocoptera': Psocidae), Zootaxa 3835 (4), pp. 469-500 : 472-474

Trichadenotecnum cinnamonum Endang & New

( Figs 1 BC, 2, 3)

Trichadenotecnum cinnamonum Endang & New, 2005: 35 (male).

[Not T. cinnamonum Endang & New, 2005: 36 (female): Misidentification.]

Specimens examined: [ Malaysia] 1 male (KY347), Gunung Brinchang, Cameron Highland, Pahang, 13.vii.2003, H. Kojima (UKM); 1 female, Gunung Jasar, Path 10, Cameron Highland , Pahang, 14.vii.2003, KY ( UKM) .

Description of female genitalia. Egg guide long ( Fig. 3A ), much longer than basal width, parallel sided, distal margin almost straight; body of subgenital plate short and wide, posteriorly with shallow membranous region next to egg guide, with V-shaped membranous region anteromedially. Gonapophyses ( Fig. 3B ). Ventral valve long; dorsal valve with short distal process; posterior lobe of external valve narrow. Spermapore plate ( Fig. 3C ) weakly sclerotized, anterior membranous region asymmetrical.

Remarks. The male specimen examined here is in complete agreement with the original description of T. cinnamonum , except that the hypandrial structures are in mirror images between them ( Fig. 2C ). Because of the exact similarity, we concluded that the hypandrium illustrated in the original description is drawn from the reverse. This is the first record of this species from Peninsula Malaysia.

Originally, the corniculum group was characterized by the presence of a process arising from the trichobothrial field of the male paraproct (Yoshizawa, 2003). Later, absence of this structure in T. felix Thornton, 1961 was reported, although the hypandrial structure strongly suggests its placement to the corniculum group ( Yoshizawa & Lienhard, 2004). The hypandrial structure of T. cinnamonum is more similar to that of T. felix than to species with the trichobothrial process, but T. cinnamonum has a keel on the trichobothrial field which is most likely homologous with the trichobothrial process. This suggests that the trichobothrial process is secondarily absent in T. felix , and its presence is autapomorphic for the corniculum group. The assignment of T. cinnamonum to the corniculum group can be warranted by this structure.

The female specimen examined here differs significantly from the description of the paratype female given by Endang & New (2005); this clearly shows that they belong to different species. The paratype female of T. cinnamonum also looks significantly different from the holotype male in forewing markings (heavily spotted in female paratype whereas much more sparsely spotted in holotype male). In contrast, the female identified here as T. cinnamonum is more similar to the holotype male of this species in the forewing markings ( Fig. 1 BC). In addition, the female genital structures of the specimen examined here ( Fig. 3 ) are very similar to those of T. felix and T. imrum , both of which are members of the corniculum group. In contrast, the genital structures of the paratype female, especially the absence of the posterior lobe of the external valve of gonapophyses, are more similar to the species of the spiniserrulum group (e.g., Trichadenotecnum sp. My19 or T. malayense , treated below: Figs 14 and 17 , respectively). Therefore, we conclude that the female paratype of T. cinnamonum was misidentified as that species, and we here provide the first description of the female genital structures of T. cinnamonum .

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 2. Male terminalia of Trichadenotecnum cinnamonum. A: terminalia, lateral view; B: epiproct, dorsal view; C: hypandrium, ventral view; D: phallosome, ventral view.

FIGURE 3. Female genitalia of Trichadenotecnum cinnamonum, ventral view. A: subgenital plate; B: gonapophyses; C: spermapore plate.

FIGURE 14. Female genitalia of Trichadenotecnum sp.My19, ventral view. A: subgenital plate; B: gonapophyses; C: spermapore plate.

FIGURE 17. Female genitalia of Trichadenotecnum malayense, ventral view. A: subgenital plate; B: gonapophyses; C: spermapore plate.