Systematics and biogeography of the New World species of Trichadenotecnum Enderlein (Insecta: Psocodea: ‘ Psocoptera’: Psocidae) Author Yoshizawa, Kazunori Author Aldrete, Alfonso Neri García Author Mockford, Edward L. text Zoological Journal of the Linnean Society 2008 2008-08-31 153 4 651 723 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2008.00398.x journal article 10.1111/j.1096-3642.2008.00398.x 0024-4082 5446195 THE CHIAPENSE GROUP Diagnosis: Forewing ( Fig. 17A, B ) not extensively covered with small spots; Rs fork obtuse; 3rd section of CuA slightly to rather strongly arched. Male terminalia . Eighth venter with large transversal sclerite separated from ( Fig. 19C ) or partly fused with ( Fig. 18C ) hypandrium. Clunial process well developed ( Fig. 18A ), long, forming pointed free process apically. Epiproct ( Fig. 18A, B ) chair-shaped, epiproct lobe long and wide, protruded over clunium, its dorsal margin wide and with small projection at middle. Hypandrium ( Fig. 18C ) asymmetrical; left process long, sometimes lamellate; right process usually shorter than left, distally lamellate . Median tongue much longer than wide, dorsally with rounded keel Figure 15. Female genitalia of Trichadenotecnum latipenne , showing subgenital plate (A) and internal plate (B) in ventral view. Key to species of the chiapense group (female unknown for T. erwini ) 1. 8th sternum fused with hypandrium postero-medially ( Fig. 18C )....................................... T. erwini sp. nov. – 8th sternum separated from hypandrium ( Fig. 19C ).................................................. T. chiapense sp. nov. covered by denticles or long spines. Phallosome ( Fig. 18D ) with broad pseudoparameres, widely separated from each other. Female genitalia. Body of subgenital plate ( Fig. 20A ) with pair of extensions of sclerite antero-medially. Ventral valve of gonapophyses ( Fig. 20B ) long; posterior lobe of external valve strongly projected. Internal plate ( Fig. 20C ) symmetrical; spermathecal opening surrounded by eggshaped strongly pigmented plate.