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Full-Text Articles in Physical Sciences and Mathematics
The Crinoid Fauna (Echinodermata: Crinoidea) Of Palau, Charles G. Messing
The Crinoid Fauna (Echinodermata: Crinoidea) Of Palau, Charles G. Messing
Marine & Environmental Sciences Faculty Articles
Taxonomic revisions and a recent survey using scuba place the number of shallow-water (< 50 m) crinoid species known from Palau at 22. Five are new records: Clarkcomanthus littoralis, Comanthus suavia, Alloeocomatella pectinifera, Oxycomanthus comanthipinna, and O. exilis. A submersible survey (to 310 m) recovered five additional new records, four of which are the first representatives of their families from Palauan waters:Eudiocrinus venustulus (Eudiocrinidae), Glyptometra sp. (Charitometridae), Cosmiometra belsuchel Messing, n. sp. (Thalassometridae), and Porphyrocrinus verrucosus(Phrynocrinidae), the first stalked crinoid recorded from Palau. Two of the three specimens of the latter have regenerating crowns, suggesting that this species may be subject to substantial predation or an …
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Marine & Environmental Sciences Faculty Articles
Stalks of isocrinid crinoids are differentiated into cirri-bearing columnals (nodals) and columnals lacking cirri (internodals). This skeletal differentiation allowed us to test whether stalk fragmentation is random or whether it occurs preferentially at a specific articulation. Our analyses indicate that the patterns of fragmentation in multicolumnal segments of extant isocrinids collected by submersible, by dredging, and in sediment samples, as well as those found as fossils, are nonrandom. The preferred plane of fragmentation corresponds to the synostosis, the articulation between a nodal and the internodal distal to it. In isocrinids this articulation has a characteristic morphology and is the site …
Compositional And Taphonomic Variations In Modern Crinoid-Rich Sediments From The Deep-Water Margin Of A Carbonate Bank, Ghislaine Llewellyn, Charles G. Messing
Compositional And Taphonomic Variations In Modern Crinoid-Rich Sediments From The Deep-Water Margin Of A Carbonate Bank, Ghislaine Llewellyn, Charles G. Messing
Marine & Environmental Sciences Faculty Articles
Multivariate analyses of the coarse-grained fraction (>2 mm) of sediments accumulating in deep water (419-434 m) along the western margin of the Little Bahama Bank reveal identifiable, small-scale compositional and taphonomic variations among local subhabitats (ridge crest, slope, foreslope, base of slope, pavements and scour pit) separated by meters to tens of meters. Bulk composition varies between planktic-(crest and slope) and lithic-dominated (pavements, scour pit) sediments. Local macrobenthic skeletal components also vary significantly among subhabitats, but are commonly dominated by echinoid and crinoid material; crinoid columnals contribute 9-52% of the coarse skeletal component of 17 sediment samples considered. Distributional …
Relocation Movement In A Stalked Crinoid (Echinodermata), Charles G. Messing, M. Christine Rosesmyth, Stuart R. Mailer, John E. Miller
Relocation Movement In A Stalked Crinoid (Echinodermata), Charles G. Messing, M. Christine Rosesmyth, Stuart R. Mailer, John E. Miller
Marine & Environmental Sciences Faculty Articles
No abstract provided.