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Lipids are key compounds in the transfer of energy and nutrients in marine food webs. Specifically, neutral lipids are the main reservoir of dietary energy in most marine animals and are often used as indicators of nutritional condition. In contrast, polar lipids, including acetone-mobile polar lipids and phospholipids, are key structural components of cell membranes. Here, we explored the fatty acid (FA) composition across the neutral and polar lipid fractions in benthic organisms belonging to five major phyla (Arthropoda, Cnidaria, Echinodermata, Mollusca, and Porifera), which were collected from a deep-water region in the Northwest Atlantic. Overall, the FA composition of acetone-mobile polar lipids (e.g., glycolipids) and phospholipids was more similar to each other and characterized by higher proportions of saturated FA (e.g., 16:0) compared to that of neutral lipids. This result reflected the different functions (structural vs storage) of these lipid fractions. Furthermore, independently of the taxon, monounsaturated FA (e.g., 16:1[omega]7, 18:1[omega]9) were dominant in neutral lipids, suggesting their preferential utilization for energy production. Whereas several species, including the gastropod Buccinum sp., retained the essential polyunsaturated FA (i.e., [omega]3 and [omega]6 FA) in their neutral lipids, others, such as the crustacean Pasiphaea tarda and the echinoderm Phormosoma placenta incorporated them into their polar lipids, pointing to differences in the metabolism of essential FA across species. These findings highlight the value of quantifying differences among lipid fractions. Last, the relatively high content of essential FA in neutral lipids of most species suggested a dietary surplus indicating a healthy, productive food web., Author(s): Camilla Parzanini [sup.1] [sup.2] , Nurgül Sen Özdemir [sup.1] [sup.3] , Laura Carreón-Palau [sup.1] [sup.4] , Christopher C. Parrish [sup.1] Author Affiliations: (1) grid.25055.37, 0000 0000 9130 6822, Department [...]

Killikaike blakei is a new genus and species of anthropoid from the late Early Miocene of southeastern Argentina based on the most pristine fossil platyrrhine skull and dentition known so far. It is part of the New World platyrrhine clade (Family Cebidae; Subfamily Cebinae) including modern squirrel (Saimiri) and capuchin monkeys (Cebus) and their fossil relatives known from Early to Middle Miocene and subrecent periods. Living cebines are relatively large-brained, adroit predatory foragers and live within complex social groups, and wild capuchins exhibit a wide range of behaviors associated with enhanced intelligence. We show that K. blakei lacks diagnostic derived characteristics of the lower face and premolar dentition that are shared by modern cebines, but its strongly vaulted frontal bone and capacious anterior cranial fossa indicate the early evolution of an enlarged forebrain. Miocene | Paleoprimatology | Patagonia | Platyrrhini | Cebinae

Centipedes and millipedes were collected from November 1986 through December 1988 in 12 sandhill communities from north and central Florida. Most individuals were systematically collected with drift fences, funnel traps and pitfall traps; others were taken when observed in the field, by overturning logs and by searching in leaf litter. The collection included 223 centipedes of 7 species and 269 millipedes of 8 species. Abundance and species richness were generally unrelated to the ground surface habitat features that were examined for correlation.