scholarly journals Systematic revision and palaeobiology of Rosenfeldia triasica and Rogeryon oppeli gen. et comb. nov. (Eucrustacea, Polychelida)

2017 ◽  
Author(s):  
Denis Audo ◽  
Günter Schweigert ◽  
Sylvain Charbonnier ◽  
Joachim T. Haug
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Late Jurassic ◽  
Late Triassic ◽  
Systematic Revision ◽  
Fossil Species ◽  
Extant Species ◽  
Horseshoe Crabs ◽  
Slow Moving ◽  
First Time

Polychelidan lobsters (Decapoda: Polychelida) are crustaceans with extant species which are restricted to deep water environments. Fossil species, however, used to live in more varied palaeoenvironments, from shallow water to deep water, and were more diverse morphologically. We redescribe two species of polychelidan lobsters, the Late Triassic Rosenfeldia triasica Garassino, Teruzzi & Dalla Vecchia, 1996 and the Late Jurassic Eryon oppeli Woodward, 1866, recently assigned to the same genus, Rosenfeldia, based upon only a few characters. Our investigation of all available material of both species leads us to distinguish these two species and to erect Rogeryon gen. nov. to accommodate Eryon oppeli. The palaeobiology of both species is interpreted for the first time. Rosenfeldia triasica with its stout first pereiopods and mandibles with both incisor and molar processes (documented for the first time in Polychelida) was benthic and probably fed either on slow-moving sedentary preys or was a scavenger. Rogeryon oppeli gen. et comb. nov. was benthic, visually adapted to shallow water palaeoenvironments, and possibly had a diet similar to that of slipper lobsters and horseshoe crabs. The redescription of these two species highlights the palaeobiological diversity of fossil polychelidans.

Batocrinidae (Crinoidea) from the Lower Mississippian (lower Viséan) Fort Payne Formation of Kentucky, Tennessee, and Alabama: systematics, geographic occurrences, and facies distribution

2018 ◽  
Vol 92 (4) ◽  
pp. 681-712
Author(s):  
William I. Ausich ◽  
Elizabeth C. Rhenberg ◽  
David L. Meyer
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Dominant Species ◽  
Carbonate Facies ◽  
Shallow Marine ◽  
First Time ◽  
Water Carbonate ◽  
Shallow Water Carbonate ◽  
Water Facies ◽  
Mixed Carbonate

AbstractThe Batocrinidae are characteristic faunal elements in Lower Mississippian shallow-marine settings in North America. Recent delineation of objectively defined genera allows a reexamination of batocrinid species and their distribution in the Fort Payne Formation (early Viséan, late Osagean), a well-studied array of carbonate and siliciclastic facies. The Fort Payne batocrinid fauna has 14 species assigned to six genera, plus hybrid specimens.Magnuscrinus spinosus(Miller and Gurley, 1895a) is reassigned to its original placement inEretmocrinus. Hybrid specimens (Ausich and Meyer, 1994) are regarded asEretmocrinus magnificus×Eretmocrinus spinosus.Macrocrinus casualisis the dominant species ofMacrocrinusin the Fort Payne, andM.mundulusandM.strotobasilarisare recognized in the Fort Payne Formation for the first time.Magnuscrinus cumberlandensisn. sp. is named, 13 species are designated as junior synonyms, the name for the hybrid specimens is changed toEretmocrinus magnificus×Eretmocrinus spinosus, and the previous occurrences of two species in the Fort Payne are rejected. The Eastern Interior Seaway was a mixed carbonate-siliciclastic setting with both shallow- and deep-water epicontinental sea facies ranging from relatively shallow autochthonous green shales to deep-water turbidite facies.Dizygocrinuswas restricted to shallow-water carbonate and siliciclastic facies,Eutrochocrinuswas restricted to shallow-water carbonate facies, andMagnuscrinuswas restricted to deep-water facies. Species distributions varied fromAbatocrinus steropes,Alloprosallocrinus conicus,Macrocrinus mundulus, andUperocrinus nashvillae, which occurred throughout the Eastern Interior Seaway, to species that were restricted to a single facies.Eretmocrinus magnificus,Alloprosallocrinus conicus, andUperocrinus robustuswere the dominant batocrinids in the Fort Payne Formation.UUID:http://zoobank.org/703aafd8-4c73-4edc-9870-e2356e2d28b8

The genus Benthofascis (Gastropoda: Conoidea): A revision with descriptions of new species

Zootaxa ◽  
2011 ◽  
Vol 2796 (1) ◽  
pp. 1 ◽  
Author(s):  
J. K. TUCKER ◽  
M. J. TENORIO ◽  
P. STAHLSCHMIDT
Keyword(s):  
New Species ◽  
Western Australia ◽  
Type Species ◽  
Fossil Species ◽  
Extant Species ◽  
Three New Species ◽  
Geologic Record ◽  
First Time

The conoidean gastropod genus Benthofascis Iredale, 1936 is examined. This genus of Conorbidae has extant species. Three previously described species from the Recent including the type species B. biconica (Hedley), B. sarcinula (Hedley), and B. lozoueti Sysoev & Bouchet are reviewed. Three new species from the Recent, B. conorbioides sp. nov., B. pseudobiconica sp. nov., and B. angularis sp. nov. are described from Australia. One of these (B. angularis) is the first Benthofascis species described from Western Australia. Two fossil species originally described as Conorbis from the Miocene and Oligocene of Australia (C. atractoides Tate and C. otwayensis Long, respectively) are for the first time assigned to Benthofascis, thus extending the geologic record of the genus to the Oligocene.

Origin and emplacement of an inferred late Jurassic subduction-accretion complex, Euboea, eastern Greece

1991 ◽  
Vol 128 (1) ◽  
pp. 27-41 ◽  
Author(s):  
A. H. F. Robertson
Keyword(s):  
Shallow Water ◽  
Subduction Zone ◽  
Late Jurassic ◽  
Carbonate Platform ◽  
Accretionary Prism ◽  
Oceanic Lithosphere ◽  
Passive Margin ◽  
Late Triassic ◽  
Accretionary Complex ◽  
Alkali Basalts

AbstractIn northern Euboea, central eastern Greece, an up to 3 km-thick polygenetic melange (Pagondas complex) is structurally interleaved between a Triassic–Jurassic carbonate platform (Pelagonian Zone) and an overriding harzburgitic ophiolite. The melange mainly comprises late Triassic shallow-water limestone and calciturbidites, radiolarites, Triassic–Jurassic tholeiites, alkaline basalts and minor andesites. The units concerned range from kilometre-sized thrust sheets, and detached blocks, to broken formation and structureless, or bedded matrix-supported conglomerates (diamictite). The melange includes remnants of Neotethyan oceanic lithosphere, overlain by radiolarites, hemipelagic carbonates and distal calciturbidites derived from a Mesozoic carbonate platform. Tholeiites were erupted at a Triassic–Jurassic spreading axis, whilst within-plate-type alkali basalts are interpreted mainly as seamounts. Kilometre-scale detached blocks of shallow-water coralline limestone are identified as collapsed atolls, formed within an ocean and/or along the rifted continental margin. Volcaniclastic sediments are locally interbedded with radiolarite, and reflect post-volcanic erosion of the ocean floor. Intra-oceanic convergence began, apparently in late early Jurassic time, giving rise to the Euboea ophiolite above an inferred westwards-dipping subduction zone. The Pagondas Complex then developed as an accretionary prism. The subduction trench later collided with the Pelagonian passive margin, driving the hot Euobea ophiolite over the accretionary complex, to produce amphibolites and greenschists of the metamorphic sole. Trench–margin collision then drove the entire supra-subduction zone complex, apparently eastwards, downflexing the Pelagonian carbonate platform to form a foredeep in which late Jurassic (Kimmeridgian–Tithonian) radiolarian sediments accumulated. During emplacement, the accretionary complex was disrupted and partly resedimented as debris flows, turbiditic volcaniclastic sandstone and shale in a foredeep, or foreland basin setting.

scholarly journals Decapod Crustacea of the Central Paratethyan Ottnangian Stage (middle Burdigalian): implications for systematics and biogeography

2015 ◽  
Vol 66 (3) ◽  
pp. 217-233 ◽  
Author(s):  
Matúš Hyžný ◽  
Mathias Harzhauser ◽  
Wolfgang Danninger
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Fossil Record ◽  
Outer Shelf ◽  
Decapod Crustaceans ◽  
Lower Miocene ◽  
Western Tethys ◽  
Decapod Crustacea ◽  
Portunid Crab ◽  
First Time

AbstractDecapod crustaceans from the Ottnangian (middle Burdigalian, Lower Miocene) of the Western and Central Paratethys remain poorly known. In this study, we review and re-describe mud shrimps (Jaxea kuemeli), ghost shrimps (Gourretiasp.,Calliax michelottii) and brachyuran crabs of the families Leucosiidae, Polybiidae and Portunidae. A dorsal carapace of the genusCalliaxis reported for the first time in the fossil record. Re-examination of the type material ofRandallia strouhali(Leucosiidae) andGeryon ottnangensis(Geryonidae) resulted in a transfer of these species intoPalaeomyra(Leucosiidae) andLiocarcinus(Polybiidae), respectively.Achelous vindobonensis, originally described as a chela of a portunid crab, probably belongs to a member of Polybiidae and is provisionally treated asLiocarcinussp. Only two species,J. kuemeliandC. michelottii, are also known from the Karpatian, the succeeding Paratethyan stage. In most cases, the decapod assemblages of the Ottnangian consist of rather shallow-water taxa whereas the assemblages of the Karpatian consist of deep-water taxa from the middle and outer shelf. The Central Paratethyan assemblages show similarities in genus composition to the Proto-Mediterranean and recent Indo-Pacific regions.Gourretiasp. represents the earliest occurrence of the respective genus in the fossil record. The Oligocene–Early Miocene appearance ofPalaeomyraandLiocarcinusin the circum-Mediterranean implies that sources of present-day diversity hotspots in the Indo-Pacific trace to the Western Tethys (as for other decapod genera), although coeval decapod assemblages in the Indo-Pacific remain poorly known.

First fossil Litoleptis (Diptera: Spaniidae) from the Lower Cretaceous amber of San Just (Teruel Province, Spain)

Zootaxa ◽  
2009 ◽  
Vol 2026 (1) ◽  
pp. 33-39 ◽  
Author(s):  
ANTONIO ARILLO ◽  
ENRIQUE PEÑALVER ◽  
VICTORIA GARCÍA-GIMENO
Keyword(s):  
Lower Cretaceous ◽  
Fossil Record ◽  
Wing Venation ◽  
Fossil Species ◽  
Extant Species ◽  
The Family ◽  
First Time

In this paper Litoleptis fossilis sp. nov. a new fossil species belonging to the family Spaniidae (Diptera) is described. This is the first time the genus Litoleptis has been described from the fossil record. A comparison with extant species of Litoleptis and other fossil rhagionoids is done. The fossil is also compared to not closely related Diptera but having convergent wing venation. Palaeoecological and palaeobiogeographical comments are provided.

Haplosclerida and Petrosida (Poifera : Demospongiae) from the New Caledonia lagoon

1995 ◽  
Vol 9 (1) ◽  
pp. 149
Author(s):  
J Froman
Keyword(s):  
New Species ◽  
Water Temperature ◽  
Shallow Water ◽  
Deep Water ◽  
Endemic Species ◽  
New Records ◽  
New Caledonia ◽  
Fibre Development ◽  
First Time

Sixteen species of Haplosclerida and Petrosida are described from the reefs and lagoon of New Caledonia. Five species are new and two species are reported for the first time from New Caledonia. Nine previously described species were also found in this study and extra characters are reported, or additional locality and habitat records provided. The new species belong to the Haplosclerida : Chalinidae, three species; Niphatidae, one species; and Callyspongiidae, one species. New records of Xestospongia bergquistia and X. exigua (Petrosida : Petrosidae) are reported. Some of the species described have reduced spiculation; this reduction in amount of silica in the skeleton, and increased fibre development, may be related to water temperature. The proportion of endemic species within the Haplosclerida and Petrosida shallow water fauna is 48% and 75% in deep water. Non-endemic species have closest affinities to the Australian fauna.

scholarly journals Reassessment of the phylogenetic interrelationships of basal turtles (Testudinata)

2017 ◽  
Author(s):  
Jérémy Anquetin
Keyword(s):  
Phylogenetic Analysis ◽  
Data Matrix ◽  
Late Triassic ◽  
Character State ◽  
Additional Species ◽  
Data Set ◽  
Fossil Species ◽  
Turtle Species ◽  
Phylogenetic Placement ◽  
First Time

Recent discoveries from the Late Triassic and Middle Jurassic have significantly improved the fossil record of early turtles. These new forms offer a unique opportunity to test the interrelationships of basal turtles. Nineteen fossil species are added to the taxon sample of the most comprehensive morphological phylogenetic analysis of the turtle clade. Among these additional species are recently discovered forms (e.g., Odontochelys semitestacea, Eileanchelys waldmani, Condorchelys antiqua), taxa generally omitted from previous analyses (e.g., chengyuchelyids, Sichuanchelys chowi) and species included in a phylogenetic analysis for the first time (Naomichelys speciosa and Siamochelys peninsularis). The coding of several characters is reassessed in light of recent observations, but also in order to reduce unwarranted assumptions on character and character state homologies. Additional characters from previous analyses, as well as five new ones, are also included, resulting in a data matrix of 178 characters scored for 86 turtle species and 7 fossil outgroups.The data set resolves the relationships of most newly included taxa, with the exception of Sichuanchelys chowi and ‘Chengyuchelys’ dashanpuensis. The phylogenetic placement of Heckerochelys romani, Condorchelys antiqua and Eileanchelys waldmani as stem turtles more derived than Kayentachelys aprix but more basal than Meiolania platyceps and Mongolochelys efremovi is corroborated. The relationships of chengyuchelyids remain unclear and more investigation is needed regarding these forms, yet interestingly they are unstable with respect to stem turtles. In contrast to previous analyses, Arundelemys dardeni is placed within pleurosternids. Siamochelys peninsularis falls within xinjiangchelyids. Perhaps the most salient conclusion of the present study is the placement of Naomichelys speciosa as a basal member of a clade uniting meiolaniids, Mongolochelys efremovi and Otwayemys cunicularius. This clade of rather large stem turtles was spread worldwide during the Mesozoic at least and persisted up until the Pleistocene with meiolaniids.

The stratigraphy of Wilhelmøya and Hellwaldfjellet, Svalbard

1975 ◽  
Vol 112 (5) ◽  
pp. 481-491 ◽  
Author(s):  
David G. Smith
Keyword(s):  
Late Jurassic ◽  
Late Triassic ◽  
Lithostratigraphic Units ◽  
First Time

SummaryStratigraphic sections measured at Wilhelmøya and Hellwaldfjellet in eastern Svalbard are described in their entirety in terms of formal lithostratigraphic units for the first time. They include rocks of mid-Triassic to late Jurassic age. The Uleneset Member is newly described and palynological evidence is used to show that it is largely Norian (late Triassic) in age.

scholarly journals Badenian Ostracoda from the Pokupsko area (Banovina, Croatia)

2011 ◽  
Vol 62 (5) ◽  
pp. 447-461 ◽  
Author(s):  
Valentina Hajek-Tadesse ◽  
Božo Prtoljan
Keyword(s):  
Shallow Water ◽  
Trace Element ◽  
Deep Water ◽  
Middle Miocene ◽  
Freshwater Inflows ◽  
First Time

Badenian Ostracoda from the Pokupsko area (Banovina, Croatia)In this paper we present the results of the investigations on the Badenian (Middle Miocene) ostracods from the Pokupsko area. For the first time the presence of Badenian aged sediments in Croatia can be supported by the occurrence of ostracod biozonal markers. Four Badenian ostracod zones are established: Lower Badenian Biozone NO7Acanthocythereis hystrix-Bythocypris lucida, Middle Badenian Biozone NO8Eocytheropteron inflatum-Olimfalunia spinulosa, and the two Upper Badenian Biozones NO9Neomonoceratina laskarevi-Miocyprideis sarmatica elongataand NO10Carinocythereis carinata-Phlyctenophora farkasi.On the basis of the generally accepted paleoecology of selected genera, we identified the following ostracod faunas: shallow-water marine, shallow-water brackish-marine, shallow-water reef, and deep-water marine. The paleontological and trace element analyses suggest that the Pokupsko ostracod fauna lived in shallow (50 m deep), warm, and limpid waters, connected to a deeper sea and occasionally exposed to freshwater inflows.

Serpukhovian in Britain: use of foraminiferal assemblages for dating and correlating

2020 ◽  
pp. jgs2020-170
Author(s):  
P. Cózar ◽  
I. D. Somerville
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Content Type ◽  
South Wales ◽  
First Occurrence ◽  
Supplementary Material ◽  
First Time ◽  
Early Late ◽  
Basinal Facies ◽  
Serpukhovian Stage

Analysis of foraminiferal assemblages from the Viséan-Serpukhovian boundary interval in Britain has led to the recognition that levels correlated with the first occurrence of Lochriea ziegleri at the base of the Serpukhovian Stage can be established by the foraminifer Neoarchaediscus gregorii in England and Scotland, which first occurs from the Single Post and Cockleshell limestones in northern England and laterally equivalent levels, as well as Asteroarchaediscus bashkiricus, and A. rugosus (except for South Wales). Contrary to some previous studies, the base of the Serpukhovian does not equate with the base of the Namurian (Pendleian Substage), but lies approximately at the early-late Brigantian boundary, based on the first occurrence of Neoarchaediscus postrugosus. Four foraminiferal assemblages are distinguished in the early Serpukhovian (7-10) and four assemblages in the late Serpukhovian (11-14). Despite the contrast in facies, it is now recognised for the first time that throughout the Midland Valley of Scotland, northern England and South Wales. the foraminiferal assemblages from shallow-water platform facies are completely compatible with the ammonoid subzones from deep-water basinal facies, with no apparent mismatches. There appears to be close comparability of foraminiferal assemblages and first appearance datums of marker species with most of the international foraminiferal zonal schemes in Russia.Supplementary material:https://doi.org/10.6084/m9.figshare.c.5240408

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