Oregon State Arthropod Collection Research Articles

Taxonomic voucher specimens for study of bee communities in intensively managed Douglas-fir forests in the Oregon Coast Range

Understanding how pollinators respond to anthropogenic land use is key to conservation of biodiversity and ecosystem services, but few studies have addressed this topic in coniferous forests, particularly those managed intensively for wood production. This study reports on voucher material generated as part of Zitomer et al. (2023), that assessed changes in wild bee communities with time since harvest in 60 intensively managed Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range across a gradient in stand age spanning a typical harvest rotation (0-37 years post-harvest). We additionally assessed relationships of bee diversity and community composition to relevant habitat features, including availability of floral resources and nest sites, understory vegetation characteristics, and composition of the surrounding landscape. Specimens were collected using a combination of passive sampling methods-blue vane traps and white, blue, and yellow bowl traps- and hand-netting and were identified to the lowest possible taxonomic level by A.R. Moldenke and L.R. Best. Four hundred and ten taxonomic voucher specimens were deposited into the Oregon State Arthropod Collection (Accession# OSAC_AC_2023_01_09-001-01) to serve as a reference for future research.

Digital record of specimens, including voucher material, from the study of a pollinator habitat restoration site under a commercial solar array in Jackson County, Oregon, 2019

Photovoltaic solar energy installation is booming, frequently near agricultural lands. Traditionally, the land underneath ground-mounted photovoltaic panels is unused, though some are repurposing it as habitat for pollinating insects. However, the impact of the solar panel canopy on the pollinator-plant community understory is unknown. In this study (Graham et al., 2020), we investigated the effects of solar arrays on plant composition, bloom timing and foraging behavior of pollinators in open fields (control), and in full shade and partial shade areas under solar panels in a predominant agricultural region of southern Oregon. Pollinating insect specimens were collected using hand nets, and identified to the lowest taxonomic group possible by M. Graham, A.R. Moldenke, and L.R. Best. A total of 85 voucher specimens were deposited into the Oregon State Arthropod Collection; accession record: OSAC_AC_2021_03_11_001-01.

Treehopper voucher specimens collected in from Benton, Josephine, and Yamhill Counties, Oregon

Treehopper insect populations (Hemiptera: Membracidae) were surveyed in 2018 in Benton, Josephine, and Yamhill Counties, Oregon to determine their potential roles in the epidemiology of Grapevine red blotch virus. Stictocephala basalis and Tortistilus albidosparsus were identified through a taxonomic assessment of samples collected by hand near vineyards and in a natural area. Historical presence of Spissistilus festinus in the Willamette Valley is discussed. Voucher specimens were deposited in the Oregon State Arthropod Collection and at the United States National Museum of Natural History.

Confirmed presence of the squash bee, Peponapis pruinosa (Say, 1837) in the state of Oregon and specimen-based observational records of Peponapis (Say, 1837) (Hymenoptera: Anthophila) in the Oregon State Arthropod Collection

A new Oregon record for Peponapis pruinosa (Say, 1837) is presented with notes on its occurrence and photographs. This record provides the first empirical evidence of the genus and species in the state of Oregon. A dataset of Peponapis (Say, 1837) specimens in the holdings of the Oregon State Arthropod Collection is included with a brief summary of its contents.

Examination and redetermination of selected specimens of Cercyon Leach 1817 (Coleoptera: Hydrophildae) in the Oregon State Arthropod Collection

Specimen numbers are provided for 54 specimens of Cercyon that were determined and/or redetermined during a visit to the collection. The specimens belong to Cercyon luniger, C. fimbriatus, C. littoralis and C. setulosus.

Specimen records for North American Lepidoptera (Insecta) in the Oregon State Arthropod Collection. Lycaenidae Leach, 1815 and Riodinidae Grote, 1895

A dataset for North American specimens in the holdings of the Oregon State Arthropod Collection is presented. Details about the metadata an some basic summary of the contents are presented. The dataset itself, in the form of a text file (csv formatting) is provided in the supplemental file materials.

Specimen records for North American Lepidoptera (Insecta) in the Oregon State Arthropod Collection. Pyraloidea: Crambidae Latreille 1810 and Pyralidae Linnaeus, 1758

A dataset for North American specimens in the holdings of the Oregon State Arthropod Collection is presented. Details about the metadata an some basic summary of the contents are presented. The dataset itself, in the form of a text file (csv formatting) is provided in the supplemental file materials.

Specimen records for North American Lepidoptera (Insecta) in the Oregon State Arthropod Collection. Zyganoidea: Zygaenidae, Latreille 1809, Limacodidae,Moore 1879, Dalceridae Dyar, 1898 and Megalopygidae Herrich-Schäffer, 1855

A dataset for North American specimens in the holdings of the Oregon State Arthropod Collection is presented. Details about the metadata an some basic summary of the contents are presented. The dataset itself, in the form of a text file (csv formatting) is provided in the supplemental file materials.

Specimen records for North American Lepidoptera (Insecta) in the Oregon State Arthropod Collection. Hepialidae Stephens, 1829.

A dataset for North American specimens in the holdings of the Oregon State Arthropod Collection is presented. Details about the metadata an some basic summary of the contents are presented. The dataset itself, in the form of a text file (csv formatting) is provided in the supplemental file materials.

Imen records for North American Lepidoptera (Insecta) in the Oregon State Arthropod Collection. Cossoidea: Cossidae Leach, 1815 and Sessiidae Boisduval, 1828

A dataset for North American specimens in the holdings of the Oregon State Arthropod Collection is presented. Details about the metadata an some basic summary of the contents are presented. The dataset itself, in the form of a text file (csv formatting) is provided in the supplemental file materials.

Specimen records of Bombus (Alpinobombus) in the Oregon State Arthropod Collection as of December 2018

Digital records for 88 specimens of Bombus (Alpinobombus) are provided in an attached supplemental data file, including an important state record for Bombus (Alpinobombus) kirbiellus Curtis 1835 from Mount Baker, Whatcom County, Washington collected in 1980 by D. Shaw.

Visitor log for the Oregon State Arthropod Collection, January-December, 2018

Visitor log for the Oregon State Arthropod Collection, January-December, 2018

Visitor log for the Oregon State Arthropod Collection, January-December, 2018

Visitor log for the Oregon State Arthropod Collection, January-December, 2018

Outgoing Loans, November 2018

A record of outgoing specimen loan for the month of November, 2018 the Oregon State Arthropod Collection

Redetermination of select dragonfly specimens (Insecta: Odonata).

A record of specimens re-determined by Mr. Johnson during a recent visit to the Oregon State Arthropod Collection to verify historical records.

North American Lepidoptera in the Oregon State Arthropod Collection: Hesperiidae, Pieridae and Papilionidae

A dataset is presented containing 40,008 specimen-based records for North American Lepidoptera. The basis for all these records are dried preserved specimens in the Oregon State Arthropod Collection. This dataset represents one of series of contributions by the OSAC to the LepNet project which is creating an aggregated dataset of North American butterflies and moths.

Predators collected from balsam woolly adelgid and Cooley spruce gall adelgid in western Oregon and Washington, U.S.A., with reference to biological control of hemlock woolly adelgid (Hemiptera: Adelgidae)

As part of a comprehensive study to survey predators associated with hemlock woolly adelgid, Adelges tsugae Annand, 1928 in the Pacific Northwest (PNW), U.S.A. (Kohler et al. 2008), predators of balsam woolly adelgid, Adelges piceae (Ratzeburg, 1844) and Cooley spruce gall adelgid, Adelges cooleyi (Gillette, 1907) (all Hemiptera: Adelgidae) were sampled on nine dates from June 2005 to October 2006 on a small number of trees. Samples were collected every 6–8 weeks. Predators were collected from two A. piceae infested grand fir, Abies grandis (Douglas ex David Don) Lindley, and one A. cooleyi infested Engelmann spruce, Piceae engelmanii Parry ex Engelmann, on the Oregon State University campus in Corvallis, Oregon, and two A. cooleyi infested Douglas-fir, Pseudotsuga menziesii (Mirbel) Franco (all Pinaceae). One Douglas-fir was an ornamental tree in Corvallis, Oregon and the other was in a seed orchard on Whidbey Island, Washington. Adelges cooleyi predators were collected by striking an infested branch four times over a plastic tub with an area of 0.16 m2. Adelges piceae predators were collected by brushing adelgid wool on the bole of infested trees with a 2-inch wide paintbrush over a beat sheet. Predators were collected from the tub and beat sheet with an aspirator. Adult insects were killed in a sealed 9-dram plastic vial containing a small piece of Hot Shot No-Pest Insecticide Strip (Spectrum Brands Inc., Atlanta, Georgia). Immature insects were killed in KAAD mixture (10 parts 95% ethanol, 1 part kerosene, 2 parts glacial acetic acid, and 1 part dioxane) and preserved in 70% ethanol (Borrer et al. 1989). Adult specimens were identifi ed either by taxonomic specialists or by comparison to previously identified museum specimens. Voucher specimens were deposited in the Oregon State Arthropod Collection, Department of Zoology, Oregon State University, Corvallis, Oregon.

Range of Pristiloma crateris Pilsbry, 1946 (Gastropoda: Pulmonata: Pristilomatidae) in the United States Pacific Northwest

Extensive holdings of Pristiloma snails in the Oregon State Arthropod Collection were evaluated and reidentified as necessary. The study confirmed the distinctness of Pristiloma crateris from other species and delineated a range in Pacific Northwest National Forests, primarily along the western and eastern slopes of the Cascade Range in Oregon.