Philocasca oron (Clatsop Philocascan Caddisfly)

[another specialist]

Philocasca oron - Ross, 1949
Clatsop Philocascan Caddisfly

Concept Reference: Clemson University Department of Entomology. 2002. Trichoptera World Checklist. Continual updates by John Morse. Last updated 5 September 2006. Online. Available: entweb.clemson.edu/database/trichopt/index.htm
Concept Reference Code: N02CLE01EHUS
Name Used in Concept Reference: Philocasca oron

Global Status: GH
Global Status Last Reviewed: 08Mar2005
Global Status Last Changed: 07Sep1984
Rounded Global Status: GH - Possibly Extinct

Reasons:
Only in type locality and none recently.

Nation: United States
National Status: NH

explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.114024/Philocasca_oron

[Melanie]

Contributions to the systematics of the caddisfly genera Pseudostenophylax and Philocasca with special reference to the immature stages (Trichoptera: Limnephilidae)

G. B. Wiggins, N. H. Anderson

Canadian Journal of Zoology, 1968, 46(1): 61-75, 10.1139/z68-012

[Melanie]

Scientific description

Herbert H. Ross (1949)
Descriptions of some western Limnephilidae
(Trichoptera). Pan-Pacific Entomologist,
25(3): 119-128.

[Sebbe]

Montiphylax, (Trichoptera, Limnephilidae), a new genus to accommodate the western North American species: Stenophylax antennatus Banks, 1900, Philocasca thor Nimmo, 1971, and Philocasca alba Nimmo, 1977.

Ross (1949) described Philocasca oron and pointed out (although did not illustrate) the aedeagal structure was typical for the genus. The primary characters Ross listed to separate P. oron from P. demita were width and thickness of mesal cerci processes (thin and curved ventrad) and reduced spur count (1-2-2). The P. oron type locality is Bear Creek, Clatsop County, Oregon, 12 April 1947, S.G. Jewett, Jr. [likely near 45.78172 -123.43585 C. Kerst and R. Wisseman pers. comm. 2018]. Wiggins and Anderson (1968) noted the collection of a 1-3-4 spur count P. oron specimen. During research for this paper, DER has also noted inconsistent spur counts in P. demita and P. rivularis. Often one hind leg preapical spur is totally absent while the second preapical spur is reduced to a nub. We have been unable to locate fresh Clatsop County, Oregon, Philocasca specimens for DNA analysis. The male and female differences presented to separate P. oron and P. demita are minor variations in shape of a couple structures. A larva distinguishable from P. demita has not been found, although the larvae of the other Philocasca species are readily separated. We suspect P. oron is a synonym of P. demita. The type locality is in an area that has been extensively clear-cut and developed for residential/recreational housing over the intervening years (C Kerst, pers. comm. 2018).

zookeys.pensoft.net/article/31155/

[Sebbe]

Rasmussen, A.K., & Morse, J.C. 2023. Distributional Checklist of Nearctic Trichoptera (2022 Revision). Florida A&M University, Tallahassee. 541 pp. Available at trichoptera.org/nearctic-checklist.