Xyleborus dryographus

Scientific profile

This beetle has a body length of approximately 2.0 millimetres and a body mass of around 0.000757 grams. The overall colour is pale, with a lightness value of 114.13. The head is 0.307 millimetres long and 0.618 millimetres wide, bearing eyes of 0.03 square millimetres in area and antennae 0.405 millimetres long. The pronotum measures 0.879 millimetres in length and 0.832 millimetres in width. The elytra are 1.564 millimetres long and 0.423 millimetres wide. Wing length is 3.454 millimetres, wing area 2.933 square millimetres, and wing load 0.258, with an aspect ratio of 3.175. The body is quite rounded, with a roundness value of 0.968. It has pronounced hairiness, particularly on the ventral abdomen (38.585 fine hairs), and the dorsal surfaces of the head, pronotum and abdomen are also hairy, with counts of 13.514, 12.107 and 16.548 respectively. The legs are short and slender; for example, the mid femur is 0.426 millimetres long and 0.181 millimetres wide. Mandibles are 0.214 millimetres long and 0.196 millimetres wide at the base, with an aspect ratio of 0.916. No pronounced sexual dimorphism is evident in the measured traits (dimorphism score 1.0). In the German Red List, the species is listed with an unknown category (asterisk) and a population trend of 'mh' (very common).