Immature stages and biology of the enigmatic oxyporine rove beetles, with new data on Oxyporus larvae from the Russian Far East (Coleoptera: Staphylinidae) Author Tokareva, Alexandra Author Solodovnikov, Alexey Author Konstantinov, Fedor text Acta Entomologica Musei Nationalis Pragae 2020 2020-03-31 60 1 245 268 journal article 10.37520/aemnp.2020.014 fa3aaa8e-3e9c-4082-89b8-44854e4354b1 1804-6487 3736556 BE18A83D-CDFC-4B02-82E8-A50E66E32C27 Оxyporus ( Pseudoxyporus ) occipitalis Fauvel, 1864 Published data. LESCHEN & ALLEN (1988) : morphological description of E, L3 without chaetotaxy, P; HANLEY & GOODRICH (1993) : hosts and distribution. Larval morphology. Head and body sclerites without pigmentation; prementum with lateral setae 1/4 times as long as medial setae, sublateral setae absent; from two to three articulated spines on the inner lobe of mala. Development. According to LESCHEN & ALLEN (1988) , the third instar larvae left the fungal fruit body four days after collection and afterwards developed into adults in five days. HANLEY & GOODRICH (1993) showed that full development in laboratory at room temperature from egg to imago is very short and takes only 17 days as follows: egg: several hours; instar I: approximately one day; instar II: appr. one day; instar III: appr. six days; pupa: appr. six days. Behavior. Females were typically laying eggs in the chamber built inside the gill layer of the fungi ( LESCHEN & ALLEN 1988 ). According to HANLEY & GOODRICH (1993) , O. occipitalis were collected only from the mature fungal fruit bodies. A male and female were once seen copulating on a host fungal cap. Hatching was said to begin several hours after collecting the eggs. In the Pacific Northwest ( USA ) this species was collected mostly in October, but overall across its range from September to November.