Antrodiaetus occultus Coyle

Antrodiaetus occultus Coyle Figs. 3, 31, 47 Antrodiaetus occultus Coyle 1971: 353 ���354, figs. 123, 178, 204 ��� 206, 248 ��� 249; Platnick 2005. Material Examined. Oregon: Lane County: Eugene, 2 males (determined by Coyle, 1969) (AMNH); H. J. Andrews Experimental Forest, 5 males (JMC). Diagnosis. This species is the only member of the genus which has the tibia I prolateral macrosetae reaching the distal end of the segment on males (Fig. 47). Abbreviated Description. All three dorsal opisthosomal sclerotized patches separate; male genital plate with sclerotized parts divided, straight to recurved (Fig. 31); chelicera without distodorsal projection, without setae on upper ectal surface; with prolateral brush of macrosetae on tibia I (Fig. 47) which reach distal end of segment, 37���74 % of macrosetae ensiform; tibia I with 2���9 macrosetae retrolaterally, without large heavy macrosetae ventrally; tibia and metatarsus I not swollen in lateral view; metatarsus I sinuous, without macrosetae ventrally; tip of palpal outer conductor sclerite not closely appressed to inner conductor sclerite; palpal tibia 2.11���2.25 times longer than wide; males active above ground from late September to early November. Distribution. Western Oregon between the coast and the Cascade Mountain range (Fig. 3; Coyle 1971: Map 2). Comments. Examination of voucher material from the study of McIver et al. (1992) revealed the presence of two species: individuals from old growth stands (JMC) are A. occultus and small, yellowish colored specimens (OSAC) from a clearcut stand (3 males) are possibly an undescribed species.
Published as part of Cokendolpher, James C., Peck, Robert W. & Niwa, Christine G., 2005, Mygalomorph spiders from southwestern Oregon, USA, with descriptions of four new species, pp. 1-34 in Zootaxa 1058 on page 30, DOI: 10.5281/zenodo.170130
{"references":["Coyle, F. A. (1971) Systematics and natural history of the mygalomorph spider genus Antrodiaetus and related genera (Araneae: Antrodiaetidae). Bulletin of the Museum of Comparative Zoology, 141 (6), 269 - 402.","Platnick, N. I. (2005) The world spider catalog, version 5.5. American Museum of Natural History, New York. Available from: http: // research. amnh. org / entomology / spiders / catalog / index. html (accessed 31 August 2005)","McIver, J. D., Parsons, G. L. & Moldenke, A. R. (1992) Litter spider succession after clear-cutting in a western coniferous forest. Canadian Journal of Forestry Research, 22, 984 - 992."]}