Dinmopsylla gen. nov.

Type species. Dinmopsylla semota sp. nov.

Diagnosis. Forewing: Basal piece of Sc quite long, reaching costal margin at level of primary fork of R, Sc then fused with costal margin for a short distance before obliquely diverging to fuse with R1 until the pterostigmal area where it forms that area’s short antero-basal margin; pterostigmal area appearing hyaline, apparently not sclerotised, c. 4 times longer than wide, extending beyond level of Rs fork, posterior margin evenly curved; inter-radial space about as wide basally as apically; ir upright; r-m between Rs and M1+2; basal crossvein (m-cua in Fig.1) between M and CuA; M3+4 long,> ½ the length of M1+2; CuA fork acute, c. 35˚; CuA1 more or less in line with stem of CuA, inclined towards margin (the base only is preserved); CuA2 long, distinctly inclined; 1A closer to CuP than to 2A; 2A distinctly curved away from 1A apically.

Notes. The generic name is a combination of Dinmore (with the letters ‘re’ omitted for the sake of euphony) and the standard generic root ‘psylla’. While I was loath to create yet another generic name within the Archipsyllidae, this Triassic forewing does not fit into any of the existing genera. Sc is in two pieces only in Mydiognathus; the basal piece of Sc is much shorter in Archipsylla, Archipsyllodes, Archipsyllopsis, Burmopsylla and Psocorrhyncha, terminating at or before the level of the separation of M from R; the pterostigma is much shorter, less than 3 times longer than wide, in Archipsylla, Archipsyllodes, Burmopsylla, Mydiognathus and Psocorrhyncha, and its posterior margin is distinctly angulate in Archipsyllodes, Burmopsylla and Mydiognathus; the inter-radial space is much wider apically than basally in all other genera; ir is distinctly inclined in Archipsylla, Archipsyllodes, Archipsyllopsis and Psocopsylla; r-m runs to the stem of M rather than M1+ 2 in Psocopsylla; the basal crossvein is between M+R and CuA in Mydiognathus and Psocorrhyncha, rather than between M and CuA; M3+4 is shorter, no more than half the length of M1+ 2 in all other genera except possibly Archipsyllopsis; the CuA fork is more obtuse, c.70˚, in all other genera except Mydiognathus and Psocorrhyncha in which it is approaching 90˚; CuA1 is angled upwards in all other genera (for Burmopsylla see figs 1 and 2 in Liang et al. 2016, rather than fig.3); CuA2 is shorter and nearly upright in all other genera; CuP, 1A and 2A are more or less equally spaced in Archipsyllopsis and Psocopsylla; and 2A is at most only slightly curved, and more or less parallel to 1A in all other genera except Burmopsylla. The above analysis is based on the descriptions and figures in Vishniakova (1976), Huang et al. (2008), Liang et al. (2016), Yoshizawa & Lienhard (2016) and Huang et al. (2016).