00505nas a2200133 4500008004100000245011400041210006900155260002400224100001700248700002600265700001800291700001900309856004300328 2014 eng d00aIdentifying Neogene seagrass habitats as a cornerstone to study ecological responses to environmental change 0 aIdentifying Neogene seagrass habitats as a cornerstone to study  aGainsville, Florida1 aReich, Sonja1 aWesselingh, Frank, P.1 aWarter, Viola1 aRenema, Willem uhttps://ipaeg.myspecies.info/node/206502197nas a2200133 4500008004100000245006000041210005300101260001200154520178200166100002801948700002501976700001902001856004302020 2012 eng d00aOn the origins of the coral diversity in Southeast Asia0 aorigins of the coral diversity in Southeast Asia c07/20123 a

Evidences from palaeontological and molecular studies suggest that the formation of the SE Asian ancestral centre of diversity occurred during the Miocene. Under the umbrella of the Throughflow project, delta-front patch reefs from 42 outcrops were studied in East Kalimantan (Indonesia), including extensive collections of tens of thousands of specimens within 265 samples. This research aims to answer how diverse were corals during the Miocene and which environmental factors played a role in their diversification on both, temporal and spatial scales. Coral morphologies seem to respond to the gradient of siliciclastic input created by the Mahakan Delta system. Platy-coral assemblages were common in the vicinity of the delta, characterized by a higher turbid-water regime, and mainly from the Early to Middle Miocene (up to Serravallian age). On the other hand, communities of branching corals mixed with scattered massive coral heads were more frequent during the Late Miocene (Tortonian to Messinian age) in settings located towards the north, far-off the delta influence. Although preliminary (<10% of samples examined), species diversity was high in both platy and branching coral assemblages, and comparable to modern coral settings living under similar environmental conditions. A total of 51 morphospecies (36 genera) have been identified so far, from which only three genera are considered as extinct, Dictyaraea, Anisocoenia, and Fungophyllia. Whether the observed species turnover is due to major global environmental changes after the Middle Miocene, or it is merely explained by switching of the Mahakan Delta gradient, or a combination of both, is an aspect to be examined in further integrated analysis including geochemistry and sedimentology.

1 aSantodomingo, Nadiezhda1 aJohnson, Kenneth, G.1 aRenema, Willem uhttps://ipaeg.myspecies.info/node/204802493nas a2200193 4500008004100000245007000041210006900111260006700180490000600247520188400253653001402137653001302151653001702164653001502181653001502196100002002211700002502231856004302256 2013 eng d00aWhy is the tropical Cenozoic fossil record so poor for bryozoans?0 aWhy is the tropical Cenozoic fossil record so poor for bryozoans aCatania, ItalybMuseo Tridentino di Scienze Naturalicin press0 v13 a

Diverse bryozoan assemblages have been recorded from widely across the Cenozoic palaeotropics, including the West Indies and Central America (Miocene-Pleistocene), Arabia (Oligocene), East Africa (Miocene), India (Eocene-Miocene) and the East Indies (Eocene-Miocene). However, records of Cenozoic tropical bryofaunas are relatively few compared with higher latitudes, and bryozoan limestones seem to be lacking. Insights into the reasons for this poor fossil record can be gleaned from comparisons with modern tropical bryozoan faunas, and consideration of the effects of diagenesis on fossil preservation and other factors that bias against the tropical Cenozoic fossil record. At least for the North Atlantic, bryozoan assemblage diversity in the modern tropics is not significantly less than in higher latitudes. However, a survey of colony-forms shows that encrusting species of small biomass are more dominant in tropical assemblages (mean 78% of species) than they are outside the tropics (mean 60% of species). These encrusting colonies may be difficult to observe and study when, as is often the case in tropical carbonate settings, diagenetic cement binds sediment firmly to the colony surfaces. Most erect bryozoan species living today in the tropics have weakly mineralized skeletons with a poor potential for fossilization; robust species capable of generating large quantities of carbonate sediment are uncommon. In addition, a higher proportion of cheilostomes in the tropics have metastable skeletons of aragonite: a Raman spectroscopic survey of 23 bryozoan species encrusting the undersides of platy corals from Puerto Rico and Malaysia showed 30% to be aragonitic and 27% bimineralic. Along with the typically higher Mg levels in the calcite of tropical cheilostomes, this further biases against preservation of bryozoans in the Cenozoic fossil record.

10aBryozoans10aCenozoic10acolony-forms10adiagenesis10amineralogy1 aTaylor, Paul, D1 aDi Martino, Emanuela uhttps://ipaeg.myspecies.info/node/203502143nas a2200193 4500008004100000245007200041210006700113260006800180490000600248520154200254653001401796653001401810653001101824653001101835653001501846100002501861700002001886856004301906 2013 eng d00aA brief review of seagrass-associated bryozoans, Recent and fossil.0 abrief review of seagrassassociated bryozoans Recent and fossil aCatania, ItalybMuseo Tridentino di Scienze Naturali cin press0 v13 a

Information concerning fossil and modern bryozoan assemblages reported from seagrass habitats is scattered through a large number of papers. The current paper groups taxonomically data from the literature on both modern and fossil bryozoans associated with seagrasses. Most of the modern data comes from studies focused on Posidonia oceanica meadows inhabiting the Mediterranean Sea, where a total of 152 bryozoan species have been recorded. Forty-one species have been reported on seagrasses from other geographical areas, such as Saudi Arabia, tropical America, Japan and Australia. Differences are outlined between the well-delineated communities of the leaves and the rhizomes, and some generalizations are made about morphological strategies for living as seagrass epiphytes. Seagrasses are seldom fossilized but examples of ancient communities can be inferred from the presence of bioimmurations of seagrass surfaces and from associated biota. They include a single Cretaceous community from the Maastrichtian of The Netherlands (43 bryozoan species), and a few Cenozoic communities described from several geographical regions (e.g. Europe, tropical America, Indo-Pacific; 72 species). New data is reported from a dark grey, silty clay in the Miocene of East Kalimantan (Indonesia) where the presence of the seagrass-indicative gastropod Smaragdia allows interpretation of the palaeoenvironment as a seagrass meadow with associated corals. The bryozoan assemblage here is monogeneric, comprising two species of Vincularia.

10aBryozoans10aepiphytes10afossil10aRECENT10aseagrasses1 aDi Martino, Emanuela1 aTaylor, Paul, D uhttps://ipaeg.myspecies.info/node/2034