Showing papers in "Acta Geologica Polonica in 1997"

Middle Miocene (Badenian) gastropods from Korytnica, Poland; Part III

Abstract: This report is the second part of the monograph of the surprisingly rich assemblage of gastropods occurring in the Middle Miocene (Badenian), so-called Pleurotoma Clays in the environs of Korytnica in the Holy Cross Mountains, Central Poland. Presented are new data on the age of the Korytnica Clays, that involved an adjustment in the title of this monograph. Reviewed is also an updated state of recognition of the associated fauna, both invertebrates and vertebrates. The systematic account contains a description of 135 prosobranch species of the ten superfamilies: MelaneIlacea, Hipponicacea, CaIyptraeacea, Strombacea, Cypraeacea, Triviacea, Naticacea, Tonnacea, Muricacea, and Buccinacea, without Nassariidae. Within this assemblage, 11 species are new for the science (including 2 species formerly reported from Korytnica, but determined erroneously), and the other two require to be labelled as a nomen novun ; of the recognized as many as 90 have not hitherto been known from Korytnica and 83 from the Miocene of Poland. As new species established are: Leiostraca jaskiewiczi sp.n., Melanella ( Polygyreulima ) sanctacrucensis sp.n., Melanella ( Polygyreulima ) korytnicensis sp.n., Melanella ( Polygyreulima ) montilysensis sp.n., Megalomphalus convictor sp.n., Nacca unica sp.n., Hadriania polonica sp.n., Magilus ? ficiformis sp.n., Coralliophila ( Coralliophila ) serraticincta sp.n., Pyrene ( Mitrella ) korytnicensis sp.n., and Cantharus minutulus sp.n. For two taxa at the species level the new names introduced are: Purpura ( Tritonalia ) kojwndgievae nom.n., and Euthria friedbergi nom.n. Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}

The quest for a unified Oxfordian/Kimmeridgian boundary: implications of the ammonite succession at the turn of the Bimammatum and Planula Zones in the Wieluń Upland, Central Poland

Abstract: The detailed biostratigraphic succession at the turn of the Bimammatum Zone and the Planula Zone in the Wielun Upland, Central Poland, displays the five ammonite horizons, viz . the litocerum horizon and the broilii horizon in the Hauffianum Subzone of the Bimammatum Zone, and the minutum horizon, the proteron horizon, and the planula horizon, in the Planula Zone. The stratigraphic position of the Amoeboceras Layer (MATYJA & WIERZBOWSKI 1988) has been partly revised: it lies in the litocerum horizon of the Hauffianum Subzone of the Bimammatum Zone. The layer marks a short-time invasion of the Boreal/Subboreal ammonites into the Submediterranean Province, including such forms described previously as Amoeboceras ( Plasmatites ) bauhini (OPPEL), A . ( P .) praebauhini (SALFELD), and A . ( P .) lineatum (QUENSTEDT), as well as the recently discovered Pictonia densicostata BUCKMAN and Prorasenia bowerbanki SPATH. The presence of these ammonites, and especially of P. densicostata , shows that the lower boundary of the Subboreal Kimmeridgian corresponding to the base of the Baylei Zone, lies not higher than the litocerum horizon of the Hauffianum Subzone in the Submediterranean Succession; in fact, it may lie still lower, somewhere between an upper Bimammatum Subzone and a lower Hauffianum Subzone of the Bimammatum Zone. Precise location of the lower boundary of the Submediterranean Kimmeridgian, corresponding to the base of the Platynota Zone, is not possible in the Subboreal Succession; that boundary in the Boreal Succession lies at the base of the Kitchini Zone. Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}

The highest Kimmeridgian and Lower Volgian in Central Poland; their ammonites and biostratigraphy

Abstract: The Upper Kimmeridgian Eudoxus and Autissiodorensis Zones, with the Fallax Subzone at the top of the latter zone, as well as the Lower Volgian Klimovi, Sokolovi, Pseudoscythica, and Tenuicostata Zones, can be recognized in several expanded and continuous sections of the Paluki Formation in Central Poland. There can be reconstructed a Subboreal lineage of the Perisphinctaceae, leading from Discosphinctoides subborealis sp.n. and Sarmatisphinctes gen.n. in the Autissiodorensis Zone, through Ilowaiskya and Pseudovirgatites in the Lower Volgian, to Zaraiskites in the Middle Volgian. The ammonite assemblages of the Paluki Formation, which also include Aulacostephanus and Amoeboceras in the Upper Kimmeridgian, are predominantly of Subboreal type, but Mediterranean/Submediterranean ammonites, chiefly the Haplocerataceae, are also represented at some stratigraphic levels. Interregional stratigraphic correlations are discussed in the paper, especially those between the Tithonian and Volgian Stages. The new biostratigraphic material permits e.g. to correlate the top of the Klimovi Zone with the top of the Tithonian Hybonotum Zone, and the top of the Sokolovi Zone with a level situated slightly beneath the base of the Middle Tithonian in Franconia.

The micropolychaete Josephella commensalis sp.n. commensal to the scleractinian coral Tarbellastraea reussiana (MILNE-EDWARDS & HAIME, 1850) from the Korytnica Clays (Middle Miocene; Holy Cross Mountains, Central Poland)

Abstract: Tiny calcareous tubes, observable under SEM-magnifications, settled within calyces of colonies of the scleractinian coral Tarbellastraea reussiana (MILNE-EDWARDS & HAlME, 1850) from the topmost part of the Korytnica Clays (Middle Miocene; Holy Cross Mountains, Central Poland), and ascribed to the life activity of micropolychaetes commensal to this coral, are accomodated into the extant genus Josephella CAULLERY & MESNIL, 1896, to represent a separate species, Josephella commensalis sp.n. A coat developed on some tubes, and structured like a dense felt composed of needle-shaped sclerites (presumably aragonitic) associated with a granular precipitate of calcite, is interpreted as having been produced by the infested scleractinian polyps which reacted against the intruders by an immense secretion of calcium carbonate. An abundant occurrence of Josephella commensalis sp.n. on local growth-discontinuity surfaces within the scleractinian colonies may suggest their formation just by temporary overpopulations of the micropolychaetes whose metabolism (? or exploitation) has become fatal to a part of the colony.

Asteroids from the Nawodzice Sands (Middle Miocene; Holy Cross Mountains, Central Poland)

Abstract: An assemblage of the extremely well preserved Middle Miocene (Badenian) starfishes from Nawodzice in the Holy Cross Mountains, Central Poland, is taxonomically recognized to be composed primarily of the two species, new to the science. The dominant is Astropecten navodicensis sp.n. that usually occurs in groups of several specimens, and is preserved with the arms either extended, or closed in a tulip-like form. Associated is Ceramaster polonicus sp.n., the holotype of which has its ossicle arrangement intact. Isolated ossicles are assigned tentatively to the higher taxa, Astropecten sp. and Goniasteridae gen.et sp. indet., respectively. All starfishes of the studied assemblage are thought to be buried in life position, presumably while still alive , under extremely shallow marine (shallow subtidal to intertidal) environmental conditions some 15 m.y. ago (Badenian stage corresponding to the Langhian/Serravallian boundary interval). The species name Astropecten granulatus WIENBERG RASMUSSEN, 1972, used by WIENBERG RASMUSSEN (1972) for an Eocene species from England, and also by KACZMARSKA (1987) for the Middle Miocene isolated ossicles from the Korytnica Basin in Poland, appears to be a younger homonym of the common present-day species Astropecten granulatus M¥LLER & TROSCHEL, 1842; it is thus superseded herein by a new species name, Astropecten anglicus nom.n.

A biogenic paradigm of shells of the clavatulid gastropods the trace fossil Clavatulicola evaephilus ichnogen et ichnosp n from the Middle Miocene localities Korytnica Holy Cross Mountains, Poland and Grund Vienna Basin, Austria

Abstract: A peculiar paradigm of shells of the clavatulid gastropod (genus Clavatula LAMARCK, 1801, of the subfamily Clavatulinae, family Turridae) of Miocene age, and displayed by a pattern of furrows sculpturing preferentially the median part of the shell whorls (i.e., the anal fasciole), is ascribed to the life activity of commensals to the live gastropods. This pattern, classified as an ichnofossil, taxonomically new, Clavatulicola evaephilus ichnogen. et ichnosp.n., bears its specific name referring to the clavatulid species Clavatula evae (HOERNES & AUINGER, 1891), upon whose shells it was first presented over a century ago from Grund in the Vienna Basin, Austria. Within rich gastropod assemblages from Korytnica in the Holy Cross Mountains, Central Poland, containing a dozen or so clavatulid species, the newly established ichnotaxon is confined exclusively to the four species, viz. Clavatula evae (100% of shells infested), Cl. styriaca (100%), Cl. asperulata (92%), and Cl. suturalis (72%), what indicates a very high host specifity of the ichnofossil-producing commensals. As the potential producers of the ichnofossil pattern briefly discussed are the folliculinid infusorians and the phoronids. An attention is paid to the occurrence of the newly established ichnotaxon in the Vienna Basin fromwhere it was presented solely from the locality Grund, the gastropod assemblage of which is closest to that of Korytnica in Poland.