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Check List 2007: 3(1) ISSN: 1809-127X Check List 2007: 3(1) ISSN: 1809-127X NOTES ON GEOGRAPHIC DISTRIBUTION Insecta, Ephemeroptera: Transcontinental (Metretopodidae); Ephoron album (Say) range extensions in western North America. (Polymitarcyidae); and Siphlonurus alternatus (Say) (northern) (Siphlonuridae). In addition to W. P. McCafferty1 these transcontinental species, there are a few M. D. Meyer2 others that are disjunct East and West species that are absent to a considerable extent in central 1Department of Entomology, Purdue University. regions of the continent. West Lafayette, Indiana, USA 47907. E-mail: [email protected] Based on our recent studies of mayflies from the 2Department of Biology, Chemistry, and west coast states of California, Oregon, and Environmental Science. Christopher Newport Washington, and the western intermountain USA University, 1 University Place, Newport, Virginia states (esp. Idaho), we are able to establish eight USA 23606. additional North American species with continuous transcontinental distribution patterns. In keeping Among the 631 valid species of Ephemeroptera with the trend among families shown above, six of (mayflies) that are presently known from North these species are in the family Baetidae, and one is America (McCafferty 2007), relatively few have in the family Caenidae. We also demonstrate this been known as having more or less continuous distribution pattern in the family Pseudironidae (non disjunct) transcontinental distribution patterns for the first time. New western state records that from the east coastal provinces of Canada and or substantiate the transcontinental patterns are given east coastal states of the USA to the west coastal for each of the species treated below, followed by provinces of Canada or the west coastal states of pertinent commentary regarding their distribution. the USA or Mexico. The best representation of Acronyms of the sources of materials appear in such distribution patterns is in the family parentheses after collection data, and at the first Baetidae, e.g., Acentrella turbida (McDunnough), appearance of such an acronym, the full name to Baetis bundyae Lehmkuhl (relatively sparse and which it refers is given. Records are based on the northern), B. flavistriga McDunnough, B. aquatic, larval life stage of the mayflies, unless tricaudatus Dodds, Callibaetis ferrugineus specifically indicated as “adults” in the record data. (Walsh), C. fluctuans (Walsh), Diphetor hageni Baetidae (Eaton), Paracloeodes minutus (Daggy), Procloeon bellum (McDunnough) (relatively Acerpenna pygmaea (Hagen). sparse and northern), and P. pennulatum (Eaton) OREGON: Douglas County, Umpqua River, 30- (relatively sparse and northern). In other mayfly VIII-2001 (EPA: United States Environmental families such continuous transcontinental patterns Protection Agency, Corvallis, Oregon). are uncommon among species, or in the case of This species has historically been known as a Caenidae, less common. They include such species relatively ubiquitous eastern and midwestern as Ameletus subnotatus Eaton (northern) species, but recently has been reported extensively (Ameletidae); Baetisca lacustris McDunnough from the central plains, e.g., Saskatchewan (Baetiscidae); Caenis amica Hagen, C. latipennis (McCafferty and Randolph 1998) and Nebraska Banks, and C. tardata McDunnough (Caenidae); (McCafferty et al. 2001) and from the Ephemerella aurivillii (Bengtsson) and E. intermountain West, i.e., Alberta (Jacobus and excrucians Walsh (Ephemerellidae); Ephemera McCafferty 2001), Colorado (McCafferty et al. simulans Walker and Hexagenia limbata 1993), and Idaho (Lester et al. 2002). (Serville) (Ephemeridae); Heptagenia pulla Baetis brunneicolor McDunnough. (Clemens) and Maccaffertium terminatum IDAHO: Custer County, Grant Creek above (Walsh) (Heptageniidae); Tricorythodes minutus Bartlett Road crossing, 14-VII-1998 (EA: Traver (eastern records possibly incorrect) EcoAnalysts, Moscow, Idaho); Owyhee County, (Leptohyphidae); Leptophlebia cupida (Say), L. Pleasant Valley, 10 m downstream of culvert, 14- nebulosa (Walker) and Paraleptophlebia debilis VII-1998 (EA), and Owyhee County, Rock Creek (Walker) (Leptophlebiidae); Metretopus borealis (upper) following road to creek, 5-VIII-1998 (EA). (Eaton) (relatively sparse and northern) 51 Check List 2007: 3(1) ISSN: 1809-127X NOTES ON GEOGRAPHIC DISTRIBUTION WASHINGTON: Lewis County, Ohanapecosh Idaho, given as the junior synonym Pseudocloeon River, 29-V-1997 (CSU: C. P. Gillette Museum, edmundsi Jensen, by Jensen (1969) (see McCafferty Colorado State University, Fort Collins, Colorado); 2006). Because the latter record was taken on the Pierce County, White River, Route 410, Mount Snake River where it forms the border with Ranier National Park, 29-V-1997 (CSU). Oregon, it is applicable to Oregon as well. It Previously this species was known as an eastern should be noted that historically H. anoka has and upper midwestern species extending been commonly misidentified as Plauditus westward to far western South Dakota punctiventris (McDunnough), and it appears that (McCafferty 1990). As workers are becoming any previous far western records attributed to P. adept at morphologically differentiating larvae of punctiventris are applicable to H. anoka (see this species from B. tricaudatus Dodds in the East McCafferty et al. 2005; McCafferty 2006). Based (see Morihara and McCafferty 1979), it is proving on our recent study of the original morphotype to be common in that part of North America. material held at the Royal Ontario Museum, we Larvae of B. brunneicolor are easily differentiated are here able to confirm that the larval description from B. tricaudatus in the West based on larval of P. punctiventris by Ide (1937) was incorrectly pronotal color pattern (in addition to morphology), based on larvae of H. anoka. and thus, based on the scant number of B. brunneicolor material in the West, we conclude Pseudocloeon dardanum (McDunnough). that it is considerably less common in the western IDAHO: Canyon County, Boise River, at half of the continent. Caldwell, 22-IX-1963 (PERC); Canyon County, Nampa, 23-VIII-1947, adults (PERC). Callibaetis pallidus Banks. WASHINGTON: Jefferson County, Taft Creek, CALIFORNIA: Alameda County, Tilden Park, west of Hoh River Rain Forest Visitor’s Center, 13-V-1952 (UCB: Essig Museum of Entomology, Olympic National Park, 20-VI-1978 (PERC). University of California, Berkeley, California); This species was historically known mainly from Nevada County, Sagehen Creek, 20-VII-1978, Ohio to Colorado (Durfee and Kondratieff 1994) adults (UCD: Bohart Museum, University of in the U.S.A., and from Quebec to Alberta (Soluk California, Davis, California); San Diego County, 1981) in Canada. Its range was recently extended Julian, 4-VII-1962, adults (UCD). to the east coast in the U.S.A., and it was This species was known previously from predicted to be more common in the East than northeastern USA and eastern Canada, through previous data suggested (McCafferty et al. 2004). Michigan and central Canada to as far west as Alberta (Neave 1929), Utah (Needham and Pseudocloeon propinquum (Walsh). Christenson 1927), and Arizona (Lugo-Ortiz and CALIFORNIA: Riverside County, Deep Canyon, McCafferty 1995). Although widespread, C. 10-VII-1963, adults (PERC); Shasta County, Hat pallidus does not appear as ubiquitous as some Creek, Big Springs, 10-X-1976 (INHS: Illinois other North American species of Callibaetis Natural History Survey, Champaign, Illinois); Eaton. Shasta County, Hat Creek, Highway 299, 8-X- 1976 (INHS). Heterocloeon anoka (Daggy). OREGON: Benton County, Long Tom Canal, 21 OREGON: Deschutes County, Deschutes River, kilometers south of Corvallis, 21-V-1975 (OSU: 14-IX-2000 (EPA); Grant County, Middle Fork Oregon State Arthropod Collection, Oregon State John Day River, 16-VII-2001 (EPA). University, Corvallis, Oregon); Douglas County, WASHINGTON: Benton County, Amon Wind Creek, 16-VIII-2001 (EPA); Klamath Wasteway, Lower Amon, 1-IX-2000 (PERC: County, Sprague River, 10-VI-1975 (OSU); Lake Purdue Entomological Research Collection, County, Coyote Creek, 5-VI-1999, (PERC). Purdue University, West Lafayette, Indiana); WASHINGTON: King County, Big Soos Creek, Spokane County, Little Spokane River, Milan, 25- Auburn, 24-VIII-1998 (USGS: National Water VII-1962, adults (PERC). Quality Laboratory, United States Geological The previous farthest west records of this species Survey, Denver, Colorado); Lewis County, were Alberta (Webb and McCafferty 2003), and Centralia, 26-VII-1936, adults (INHS). 52 Check List 2007: 3(1) ISSN: 1809-127X NOTES ON GEOGRAPHIC DISTRIBUTION This species has been known as far west as the Illinois), Colin Favret (Champaign, Illinois), Bill Yukon in Canada (Wiens et al. 1975) and Idaho in Gerth (Corvallis, Oregon), Scott Grotheer the USA (Newell and Minshall 1978), and (Denver, Colorado), Steve Haydon (Davis, otherwise it is fairly well represented in the California), Brad Hubley (Toronto, Ontario), intermountain West, central plains, and eastern Darlene Judd (Corvallis, Oregon), Boris North America. Kondratieff (Fort Collins, Colorado), Phil Larson (Corvallis, Oregon), Gary Lester (Moscow, Caenidae Idaho), Bill Shepard (Berkeley, California), Bob Wieseman (Corvallis, Oregon), and Doug Yanega Caenis punctata McDunnough. (Riverside, California). CALIFORNIA: Riverside County, Santa Margarita River, Highway 395, 28-VIII-1969 (UCR: Literature cited Entomology Research Museum, University of Durfee, R. S. and B. C. Kondratieff. 1994. New California, Riverside, California).
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