North American representatives of the Tribe Aegialiini (Coleoptera: Scarabaeidae: Aphodiinae)

Gordon, Robert D.; Cartwright, Oscar Ling

doi:10.5479/si.00810282.461

Cited by 12 publications

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“…The genus Aegialia is likewise ubiquitous, but these beetles feed on detritus. Aegialia are found on sand dunes and other sandy substrates (Gordon and Cartwright, 1988).…”

Section: Insect Fossils By Scott a Eliasmentioning

confidence: 99%

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

Holliday¹

1995

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

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The dry valleys or "draws" of the Southern High Plains (in northwestern Texas and eastern New Mexico), headwater tributaries of the Red, Brazos, and Colorado Rivers, contain late Quaternary sediments that accumulated over the past 12,000+ years. A few previous, scattered stratigraphic investigations of the draws strongly suggested synchroneity in late Quaternary depositional and soil-forming events and regionwide environmental changes. This volume reports on a systematic study conducted from 1988 to 1992 aimed at better documenting the late Quaternary geomorphic evolution and stratigraphic record of the draws, investigating their paleoenvironmental significance, and determining whether there were synchronous, regional, geomorphic, and soil-forming events in these dry valleys. The work focused on the past 12,000 years because most of the valley fill dates to this time, but older deposits occur locally and were investigated as well.Most of the research was in Running Water, Blackwater, and Yellowhouse Draws (tributaries of the Brazos River), and Sulphur and Mustang Draws (tributaries of the Colorado River), with additional coring on McKenzie, Seminole, Monument, Monahans, and Midland Draws (all tributaries of the Colorado). Approximately 410 cores and exposures at 110 localities were studied. Samples collected from these sections underwent a variety of sedimentological and pedological analyses. Age control is provided by 53 new radiocarbon ages and scores of ages already available from several archaeological sites. Efforts also were made to recover pollen, phytoliths, molluscs, insects, ostracodes, and vertebrate faunal remains, and stable-carbon isotope trends were determined for four sites.Several geomorphic processes and features exerted some influence on late Quaternary drainage development. Quaternary jointing and subsidence controlled drainage patterns around the margins of the Southern High Plains, particularly on the northern edge (Red River system). Major segments of most draws roughly parallel paleodrainages on the buried Tertiary erosion surface. Factors influencing the older drainage likely influenced development of the present drainage. Segments of Running Water, Blackwater, and Sulphur Draws also probably follow ancient drainageways that once connected the plains with the mountains to the west. Most of the draws intersect paleolake basins or extant lake bains, which may have exerted control on drainage development by directing water to paleotopographic lows or by overtopping and interconnection of basins.The last phase of incision by the draws began after 20,000 yr B.P. but before 12,000 yr B.P. and aggradation began ca. 12,000 yr B.P. Valley fill predating this final incision is common locally and includes alluvial sand and gravel (stratum A) and lacustrine carbonate (stratum B). Eolian sheet sand with strong pedogenic modification (stratum C) accumulated on the uplands adjacent to some reaches during valley aggradation. on July 20, 2015 memoirs.gsapubs.org Downloaded from 2V. T. HollidayAfter ca. 12...

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“…The genus Aegialia is likewise ubiquitous, but these beetles feed on detritus. Aegialia are found on sand dunes and other sandy substrates (Gordon and Cartwright, 1988).…”

Section: Insect Fossils By Scott a Eliasmentioning

confidence: 99%

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

Holliday¹

1995

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

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“…Aegialia shimeki is a member of Aegialia sensu stricto as defined by Gordon and Cartwright (1988) and keys easily to that group in their subgeneric table, although the pronotum is a bit longer than is normal for the subgenus (40% instead of 33% of elytral length). The new species is most similar externally to A. opifex (R. D. Gordon, personal communication), but that species lacks a marginal line on the posterior edge of the pronotum, a feature quite prominent in A. shimeki.…”

Section: Aegialia Shimeki Lago and Freese New Speciesmentioning

confidence: 99%

“…The new species is most similar externally to A. opifex (R. D. Gordon, personal communication), but that species lacks a marginal line on the posterior edge of the pronotum, a feature quite prominent in A. shimeki. Once into the key to species of this subgenus presented by Gordon and Cartwright (1988), proceeding past the second couplet is problematic. The hind tibial spurs are foliaceous, although not comparable in width to the members of the conferta group (couplets 3-8), but they are obviously much broader than those exhibited by the species considered in couplet 9 and beyond.…”

Section: Aegialia Shimeki Lago and Freese New Speciesmentioning

confidence: 99%

“…Because of the addition of three new species of Aegialia (Aegialia) to the North American fauna since the Gordon and Cartwright (1988) revision appeared, a revised key to the species seems appro-priate. The following key, adapted from Gordon and Cartwright (1988) and Gordon and Rust (1990), should enable identification of the North American members of this subgenus.…”

Section: Aegialia Shimeki Lago and Freese New Speciesmentioning

confidence: 99%

“…The following key, adapted from Gordon and Cartwright (1988) and Gordon and Rust (1990), should enable identification of the North American members of this subgenus. Metatibial spurs broad, foliaceous (Fig.…”

Section: Aegialia Shimeki Lago and Freese New Speciesmentioning

confidence: 99%

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A New Species ofAegialiaLatreille (Coleoptera: Scarabaeidae: Aphodiinae) from Southeastern Iowa, USA

Lago

Freese²

2016

The Coleopterists Bulletin

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A Biota Associated with Matuyama-Age Sediments in West-Central Illinois

Miller

Graham²,

Morgan

et al. 1994

Quat. res.

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A fossil assemblage containing molluscs, mammals, insects, ostracodes, and plants has been recovered from a silt-filled depression near Lima, in west-central Illinois. The reversed remanent magnetic signature of the sediments and the temporal ranges of two mammals, Microtus paroperarius and Lasiopodomys deceitensis, constrain the age of the assemblage to between 730,000 and 830,000 yr B.P. The extent of isoleucine epimerization in the molluscan shell is consistent with this age interpretation. The fauna includes at least 43 taxa of beetles from 11 families, 35 nominal species of molluscs, and two genera of ostracodes. The mammals include two shrews, three rodents, and a rabbit. The plant macrofossils (no pollen recovered) include 25 species of seed plants and four kinds of terrestrial or wetland mosses. Most of the plant species identified still occur in the upper Midwest, although a few of the taxa are found mainly to the north of the site. The fauna is characterized by an almost total absence of true aquatic taxa. The association of both boreal and thermophilous faunal and floral elements suggest that summer temperatures were not greatly different from present ones, but cooler, moist areas must have been available to support the boreal elements. Local conditions were probably similar to those now found in northeastern Iowa, where rains blocks, fissures, and joints in carbonate bedrock serve as traps for debris accumulations, provide shade, and are kept cool and moist during the hot summer months by cold-air drainage and groundwater seepage. Summer mean temperature in these microhabitats was probably between 18 and 20°C, similar to temperatures that now occur near the northern hardwood spruce-fir transition in the eastern United States.

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North American representatives of the Tribe Aegialiini (Coleoptera: Scarabaeidae: Aphodiinae)

Cited by 12 publications

References 0 publications

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

Memoir 186 Stratigraphy and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains

A New Species ofAegialiaLatreille (Coleoptera: Scarabaeidae: Aphodiinae) from Southeastern Iowa, USA

A Biota Associated with Matuyama-Age Sediments in West-Central Illinois

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