Throscoptilium duryiW. Eugene Hall
Throscoptilium is currently composed of one described species, T. duryi (Barber 1924, Dybas 1990), and is associated with the polypore fungus Phellinus gilvus (= Polyporus gilvus). Dybas (1976: 52) notes that though the adults are active on the upper and lower surface of the host fungus, "Unlike Nanosella and allies, adults of this genus do not crawl into the spore tubes - they are too broad to fit into tubes of this diameter."
The spermatheca, used to distinguish ptiliid species, is erroneously illustrated in Barber's paper, the distortion most likely an artifact of clearing the specimen with potassium hydroxide in preparation for mounting on a microscope slide.
Throscoptilium can be distinguished from other nanosellines by its stout form, which is widest at posterior angles of the pronotum. The mesosternal process somewhat resembles that of Suterina.
Dybas (1976) provides a description/illustration of the larva from specimens collected in Indiana. Dybas noted that when larvae enter into a spore tube head first, the exposed abdominal tip coloration resembles that of the fungus surface.
The type locality for Throscoptilium duryi is listed as "near Cincinnati, Ohio" (Barber, 1924: 175). Dybas (1990) states the species occurs in the eastern United Sates.
Barber, H.S. 1924. New Ptiliidae related to the smallest known beetle. Proc. Ent. Soc. Wash. 26(6): 167 - 178.
Dybas, H.S. 1990. Ptiliidae. in Soil Biology Guide, Daniel L. Dindail, editor. Wiley-Interscience, New York.
Dybas, H.S. 1976. The larval characters of featherwing and limulodid beetles and their family relationships in the Staphylinoidea (Coleoptera: Ptiliidae and Limulodidae). Fieldiana. Zoology. 70(3): 29 - 78.
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Hall, W. Eugene. 1997. Throscoptilium. Throscoptilium duryi. Version 01 January 1997 (under construction). http://tolweb.org/Throscoptilium_duryi/9653/1997.01.01 in The Tree of Life Web Project, http://tolweb.org/