Trichadenotecnum cornutum 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 : 491

Trichadenotecnum cornutum Endang & New

( Figs 1Q , 24 )

Trichadenotecnum cornutum Endang & New, 2005: 28 .

Specimens examined. [ Malaysia] 1 male, Endau Rompin, Johor, 9.vii.2003, NT (UKM); 1 male, Fraser's Hill , Pahang, 6.iii.2003, KY ( UKM) .

Remarks. This species was originally described from Sumatra, Indonesia based on a single male and is here recorded from Peninsula Malaysia for the first time. The specimens examined here are in good agreement with the original description of T. cornutum ( Fig. 24 ). However, Endang & New (2005) described the phallosome of T. cornutum as open posteriorly, whereas, in the presently examined specimens, this structure is closed ( Fig. 24D ). However, the figure of the strongly deformed phallosome in the original description clearly shows that it was broken before being illustrated. Apart from the posteromedian part, the phallosomal structure of the present specimens is also in good agreement with the original illustration of T. cornutum . Therefore, we concluded that the difference between the present specimens and the original description corresponds to an artifact, and that the specimens examined here are conspecific with T. cornutum . Examination of the complete phallosome showed a very particular, long posteromedian spine, which is uniquely observed in this species within the genus Trichadenotecnum .

Because the female of this species remains unknown, identification of its close relatives among the majus group is difficult. Presence of the median tongue resembles T. majus and its relatives, but it represents a plesiomorphic condition within the group. T. cornutum resembles T. soenarti , for which both sexes are known, in male hypandrial structures (median tongue present) and in the structure of the phallosome (posterior margin strongly extended ventrally). Their close affinity is undoubted so that T. cornutum is also likely to be closely related to T. apertum and its relatives, as well as T. soenarti .

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 24. Male terminalia of Trichadenotecnum cornutum. A: terminalia, lateral view; B: epiproct, dorsal view; C: hypandrium, ventral view; D: phallosome, ventral view. E: phallosome, lateral view.