Temporal patterns in non-mammalian synapsid morphospace

KAMMERER, Christian F.; Univ. of Chicago: Temporal patterns in non-mammalian synapsid morphospace Non-mammalian synapsids (commonly called �mammal-like reptiles�) were the dominant group of terrestrial vertebrates during the Permian and much of the Triassic Period (~280-200 million years ago). Although patterns of taxonomic distribution are well studied in the group, comparatively little attention has been given […]

Lineage longevity Luck and a Little Flexibility Go a Long Way

LIOW, Lee Hsiang; University of Chicago: Lineage longevity: Luck and a Little Flexibility Go a Long Way Some lineages are more persistent through geologic time than their relatives, so much so they are sometimes called �living fossils� and conjure up images of freaks of nature. Are persistent taxa really distinct ecologically or morphologically from their […]

Interzooidal connection predicts division of labor in colonial marine invertebrates

VENIT, E.P.; Duke University: Interzooidal connection predicts division of labor in colonial marine invertebrates Life is organized as a structural hierarchy manifesting division of labor among elements at each level. The evolutionary processes by which this structural hierarchy formed are not well understood. This study shows that the type of inter-zooidal connections within a marine […]

Evolutionary morphology of the orbitotemporal region in Archosauria

HOLLIDAY, CM*; WITMER, LM; Ohio Univ: Evolutionary morphology of the orbitotemporal region in Archosauria The orbitotemporal region is a structurally complex, functionally important, and phylogenetically informative cephalic space built by elements of the palate and braincase which includes trigeminal nerves, adductor muscles, and other topologically conservative structures. However, little is known about the region�s evolution […]

Corbulid bivalve phylogeny and the facilitation of ecosystem invasion

ARONOWSKY, A.*; ANDERSON, L.C.; Louisiana State University; Louisiana State University: Corbulid bivalve phylogeny and the facilitation of ecosystem invasion The bivalve family Corbulidae includes about 35 nominal genera of which 15 are extant. Although corbulids are often overlooked in malacologic and paleontologic collections, in part because of their diminutive size, the family is of particular […]

What the Eleodes going on Cyclic gas exchange in the xeric beetle, Eleodes armata

LIGHTON, JRB*; SCHILMAN, PE; Univ. of NV, Las Vegas; Univ. of CA, San Diego: What the Eleodes going on: Cyclic gas exchange in the xeric beetle, Eleodes armata In insects, the discontinuous gas exchange cycle or DGC is now fairly well understood, though its selective correlates and evolutionary genesis remain elusive. Less well described and […]

Tubes squeeze and the air flows out Correlated patterns of COsub2sub emission and tracheal compression in the beetle, Platynus decentis

SOCHA, J.J.**; HARRISON, J.F.; LEE, W.-K.; WESTNEAT, M.W.; Argonne National Laboratory; Arizona State University; Argonne National Laboratory; Field Museum of Natural History: Tubes squeeze and the air flows out: Correlated patterns of CO2 emission and tracheal compression in the beetle, Platynus decentis Active tracheal compression is a prominent feature of internal dynamics in multiple species […]

Mosquitoes Respire Using the Discontinuous Gas Exchange Cycle

BRADLEY, TJ*; GRAY, EM; Univ.of California, Irvine: Mosquitoes Respire Using the Discontinuous Gas Exchange Cycle. Larval stages of the mosquito Culiseta inornata were collected and reared in the laboratory at 20oC and 12:12 L:D. Adult female mosquitoes aged between 2 and 6 days post-emergence and with access to 10% sucrose were used for the experiments. […]

Breath holding squid Physiological constraints on vertical migrations of Dosidicus gigas

TRUEBLOOD, Lloyd A.*; SEIBEL, Brad A.; GILLY, William F.; University of Rhode Island; University of Rhode Island; Stanford University: Breath holding squid: Physiological constraints on vertical migrations of Dosidicus gigas Squids found in shallow waters have been shown to have high oxygen demands and limited oxygen transport capacity. As a result, such species are thought […]

Assessing changes in the pressure-area relationship in the open circulatory system of a decapod crustacean, Palaemonetes pugio in response to hypoxia

GUADAGNOLI, J. A.*; TOBITA, K.; REIBER, C.L.; Touro University – Nevada, Henderson; University of Pittsburgh, PA; University of Nevada, Las Vegas: Assessing changes in the pressure-area relationship in the open circulatory system of a decapod crustacean, Palaemonetes pugio in response to hypoxia. Cardiovascular changes during hypoxic exposure have been studied extensively in both vertebrate and […]

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