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Titolo:
A new ichnospecies of Nereites from Carboniferous tidal-flat facies of eastern Kansas, USA: Implications for the Nereites-neonereites debate
Autore:
Mangano, MG; Buatois, LA; Maples, CG; West, RR;
Indirizzi:
Univ Kansas, Kansas Geol Survey, Lawrence, KS 66047 USA Univ Kansas Lawrence KS USA 66047 sas Geol Survey, Lawrence, KS 66047 USA Kansas State Univ, Dept Geol, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 pt Geol, Manhattan, KS 66506 USA
Titolo Testata:
JOURNAL OF PALEONTOLOGY
fascicolo: 1, volume: 74, anno: 2000,
pagine: 149 - 157
SICI:
0022-3360(200001)74:1<149:ANIONF>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRACE-FOSSIL ASSEMBLAGES; CARBONATES; MENORCA; BASIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Mangano, MG Inst Super Correlac Geol, Casilla Correo 1 CC, RA-4000 San Miguel De Tucuman, Tucuman, Argentina Inst Super Correlac Geol Casilla Correo 1 CC San Miguel De Tucuman Tucuman Argentina RA-4000
Citazione:
M.G. Mangano et al., "A new ichnospecies of Nereites from Carboniferous tidal-flat facies of eastern Kansas, USA: Implications for the Nereites-neonereites debate", J PALEONTOL, 74(1), 2000, pp. 149-157

Abstract

Predominantly horizontal, gently curved to slightly sinuous traces constituting uniserial rows of imbricated, subspherical sediment pads occur in Pennsylvanian tidal-flat facies of eastern Kansas. These traces exhibit a complex, actively filled internal structure. The presence of a median tunnel enveloped by overlapping pads of reworked sediment indicates that these biogenic structures should be included in the ichnogenus Nereites MacLeay in Murchison, 1839. A new ichnospecies, N. imbricata, is erected. Externally, Nereites imbricata differs from the other Nereites ichnospecies by the large, tightly packed, imbricated pads that commonly result in an annulated appearance on bedding-planes. Internally, obliquely arranged, arcuate laminae envelope the median tunnel and tend to follow the outline of the external semispherical pads. Additionally, the behavioral pattern reflected by N. imbricata is less specialized than that of the other Nereites ichnospecies. Eionemonoliformis Tate, 1859 resembles N. imbricata in general appearance, but lack the diagnostic Nereites internal structure, and is invariably preserved as positive epireliefs. Occurrence of Nereites imbricata as both median tunnels surrounded by reworked sediment (Nereites preservation) and uniserial rows of imbricated sediment pads (Neonereites preservation) supports the notion that Neonereites Seilacher, 1960 is a preservational variant of Nereites. The ichnogenus Nereites is an eurybathic form and is a common component of Paleozoic shallow-marine facies.

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Documento generato il 15/07/20 alle ore 08:22:25