1-12 OF 12 RESULTS FOR

Psilonichnus upsilon

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 March 1984
Journal of Paleontology (1984) 58 (2): 333–350.
.... Nonetheless, most such dwelling structures have been studied little and remain essentially unnamed. The ichnogenus Psilonichnus Fuersich is amenable to the taxonomic concept of several forms of crab burrows; presently recognized ichnospecies include P. tubiformis Fuersich and P. upsilon (n. ichnosp...
Journal Article
Journal: PALAIOS
Published: 01 April 2006
PALAIOS (2006) 21 (2): 187–196.
... a depositional context. The simple Y-, J-, and I-shaped, vertical to inclined burrows referred to as Psilonichnus include three distinct ichnospecies– P. tubiformis , P. upsilon , and P. lutimuratus . Each can be attributed to either of two decapod crustacean progenitors, thalassinoid mud shrimp, or ocypodid...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 June 2008
PALAIOS (2008) 23 (6): 370–379.
.... In size, these burrows are similar to the Psilonichnus upsilon Type B described by Gingras et al. (2000) , but their preservation in coarse-grained, sandy barforms rather than in muddy deposits and their elliptical cross section is more akin to the characteristics of Psilonichnus upsilon Type A. Both...
FIGURES | View All (9)
Journal Article
Published: 01 September 2002
Journal of Paleontology (2002) 76 (5): 892–901.
... differs from Psilonichnus upsilon Frey, Curran and Pemberton by the distinctive mud lining. The original description for P. tubiformis Fürsich does not specify a burrow wall type, and examples are not available for comparative study, but the structure is inferred from descriptions and comparison...
FIGURES | View All (4)
Series: SEPM Short Course Notes
Published: 01 January 2007
DOI: 10.2110/pec.07.52.0335
EISBN: 9781565761407
... MacEachern, whom I cordially acknowledge. Present-day burrows of Psilonichnus tubiformis have been attributed to Upogebia affarmis ( Fürsich 1981 ) but may also have been excavated by a thalassinidean decapod somewhat like Upogebia ( Frey et al. 1984 ). Modern examples of Psilonichnus upsilon...
FIGURES | View All (11)
Image
FIGURE 2 —Diagrams of the four named  <b>Psilonichnus</b>  ichnospecies, redrawn f...
in > PALAIOS
Published: 01 April 2006
near-vertical main shaft and bedding-oriented swellings that document a gravity-equilibration style of behavior, Eocene Iwaki Formation, Fukushima Prefecture, Japan. As discussed in text, P. quietus may be a junior synonym of P. tubiformis . (F) Psilonichnus upsilon (Frey); sketched from Frey et
Journal Article
Journal: PALAIOS
Published: 01 April 2002
PALAIOS (2002) 17 (2): 206–211.
... surface ( Fig. 2B ). These are trample markings and chelae marks as observed in fossil burrows from the local Pleistocene outcrop ( Gingras et al., 2000 ). The burrow's ovate cross-section, simple J-shape, and reclined morphology are similar to Psilonichnus upsilon as described by Frey et al. (1984...
FIGURES | View All (4)
Image
FIGURE 2 —Generalized stratigraphic section through the Ferris Formation al...
in > PALAIOS
Published: 01 June 2008
FIGURE 2 —Generalized stratigraphic section through the Ferris Formation along the North Platte River arm of Seminoe Reservoir showing stratigraphic context of Psilonichnus upsilon and other marine ichnofossils, as well as selachians. NALMA = North American Land Mammal Ages; La = Lancian; Pu
Journal Article
Published: 14 August 2019
Journal of the Geological Society (2019) 176 (6): 1154–1168.
.... segregatis . Boyton Marshes. Scale bar is 1 cm. ( e ) Polykladichnus irregularis . Capel Green. Scale bar is 10 cm. ( f ) Psilonichnus upsilon . (Note large form; example in yellow box is 120 cm long.) Boyton Marshes. Visible ruler is 80 cm. ( g ) Skolithos linearis . Shottisham. Scale bar is 10 cm. ( h...
FIGURES | View All (17)
Journal Article
Published: 01 November 2002
Journal of Sedimentary Research (2002) 72 (6): 871–883.
..., moderate to large diameter (10-25 mm) Thalassinoides suevicus. In addition, firmground Psilonichnus upsilon is reported from the base of TmA and SJC. In all of the examples, the trace fossils crosscut rhizoliths, are unlined, and are infilled with overlaying sediment. Thalassinoides and Psilonichnus...
FIGURES | View All (5)
Series: SEPM Special Publication
Published: 01 January 2001
DOI: 10.2110/pec.01.71.0077
EISBN: 9781565761933
... cm and a length of up to almost 1 m (Figs. 3B , 6A ). They are elliptical-circular in cross section, are unlined and unbranched, and are sediment-filled. The burrows are subperpendicular to lamination, which is truncated without distortion. They are very similar to specimens of Psilonichnus...
FIGURES | View All (9)
Journal Article
Published: 01 January 2008
Bulletin de la Société Géologique de France (2008) 179 (1): 51–72.
FIGURES | View All (15)