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5.7. Tryonicus parvus (Blattaria, Blattidae, Tryonicinae) 



Left complex 



L4 is a group of three sclerites in the ventral wall and on the left edge of the left complex 

 (fig. 87, 88, 91): L4G occupies the ventral wall of a broad ventral lobe via (= ventral 

 phallomere; fig. 87, 88, 98). L4K is a broadly horseshoe-shaped sclerite in the left anterior 

 ventral wall and bears a bulge-like process (nla in fig. 87-89, 97, 98). L4N occupies the 

 posterior left edge of the left complex and has a hinge-like articulation with L4K (A5 in 

 fig.88, 97, 98). Anterodorsally L4N has a long ribbon-like extension to the anterior (L4d 

 in fig. 88-97). The posterior end of L4N is on a short bulge-like process pda (fig. 91, 94, 

 96) and is to the right connected with the L2-sclerotisation of another process paa (fig. 94). 

 The small sclerite Lll hes in the anteriormost left dorsal wall (fig.88, 91). The right 

 anterior part of the dorsal wall has some complicated membranous foldings (fig.91-93). 

 Beneath and posterior to these foldings there are the somewhat cup-shaped Ll-sclerite 

 and, to the right of LI, the dorsoventrally curved L2-sclerite. The plate-like dorsal part 

 of LI (fig. 94) has a hinge-like articulation with L2 (A2 in fig. 94). The posterior parts of 

 LI occupy two bulge-like processes (dca in fig. 94, 95; only the ventral wall of the right 

 dca-process is membranous). The ventral part of LI sclerotises the dorsal wall of a broad 

 pouch (pne in fig. 95). This pne-pouch is strongly deepened in its rightmost part, where 

 LI has a ribbon-like extension to the anterior. At the left end of the pne-pouch LI is in 

 close contact with the anterior end of the L4d-ribbon (fig. 94, 95). The ventral wall of the 

 pne-pouch is membranous and contains the opening of the phallomere-gland (P in fig. 96). 

 L2 occupies the dorsal wall right-anterior to LI (fig. 94). From here it curves ventrad and 

 back to the left (fig. 95) into a position beneath the pne-pouch; then it extends, becoming 

 narrower, to the posterior edge of the left complex (fig. 97). The posterior end of L2 occu- 

 pies the paa-process, which is upcurved and somewhat hook-like. For most of its length 

 L2 extends broadly along the anterior edge of a pouch (Ive in fig.94, 95, 97), which is 

 dorsoventrally curved - in the same way as L2 itself and as it has been described for L2 

 and Ive of Archiblatta. The edge along the bottom of the Ive-pouch is labelled 7 in fig.92, 

 94, 96, 97. Ventrally the invagination of the Ive-pouch begins at the posterior right margin 

 of L4K (posterior end of edge 7 in fig. 97). Immediately posterior to this point L2 and 

 L4K are in close contact. L2 is restricted to the inner wall of the Ive-pouch. The outer 

 Ive-wall is completely membranous and is at the same time the dorsal (or left) wall of the 

 vla-lobe (fig.91, 92; in the figures via is pulled to the right). The ejaculatory duct (D in 

 fig.87, 91, 92) opens far anteriorly into this membrane. In the rightmost dorsal wall of 

 the vla-lobe there lies a ribbon-like extension of the R2-sclerite of the right phallomere 

 (R2m in fig.91, 101, 102). 



Figs. 83, 84: Tryonicus parvus (Blattaria, Blattidae, Tryonicinae) - 83: Male postabdomen in dorsal 

 view; with phallomere complex, subgenital plate, marginal parts of abdominal tergites 9 and 10, 

 supraanal lobe, subanal lobes, paraprocts, Pv-sclerites, distal part of rectum, and basal parts of cerci. 

 - 84: Same as in fig. 83, after removal of further parts of abdominal tergites 9 and 10 (especially 

 TlOv), parts of paraprocts, and supraanal lobe. Distal part of rectum, basal parts of cerci, and right 

 subanal lobe cut open. Anterior to transverse line: like in fig. 83. - Scale: 1mm. 



