Rusophycus is an ichnogenus of trace fossil (fossil records of lifeforms' movement, rather than of the lifeforms themselves) allied to Cruziana.[1]Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when the organism moved.[2] The sculpture of Rusophycus may reveal the approximate number of legs that the tracemaker had, although striations (scratchmarks) from a single leg may overlap or be repeated.
Both Rusophycus and Cruziana are typically associated with trilobites but can also be made by other arthropods.[3]Rusophycus is known from sediments dating to the earliest Cambrian Period (somewhat before the first appearance trilobite fossils), and from the Triassic Period (after the Permian extinction of trilobites), indicating that other producers could make the trace.[4]
Referencesedit
^Baldwin, C. T. (1977). "Rusophycus morgati: an asaphid produced trace fossil from the Cambro-Ordovician of Brittany and Northwest Spain". Journal of Paleontology. 51: 411–425.
^Garlock, T. L.; Isaacson, P. E. (1977). "An occurrence of a Cruziana population in the Moyer Ridge Member of the Bloomsberg Formation (Late Silurian)-Snyder County, Pennsylvania". Journal of Paleontology. 51 (2): 282–287. JSTOR 1303607.
^Woolfe, K. (1990). "Trace fossils as paleoenvironmental indicators in the Taylor group (Devonian) of Antarctica". Palaeogeography, Palaeoclimatology, Palaeoecology. 80 (3–4): 301–310. Bibcode:1990PPP....80..301W. doi:10.1016/0031-0182(90)90139-X.
^Donovan, S. K. (2010). "Cruziana and Rusophycus: trace fossils produced by trilobites … in some cases?". Lethaia. 43 (2): 283–284. doi:10.1111/j.1502-3931.2009.00208.x.
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rusophycus, ichnogenus, trace, fossil, fossil, records, lifeforms, movement, rather, than, lifeforms, themselves, allied, cruziana, resting, trace, recording, outline, tracemaker, cruziana, made, when, organism, moved, sculpture, reveal, approximate, number, l. Rusophycus is an ichnogenus of trace fossil fossil records of lifeforms movement rather than of the lifeforms themselves allied to Cruziana 1 Rusophycus is the resting trace recording the outline of the tracemaker Cruziana is made when the organism moved 2 The sculpture of Rusophycus may reveal the approximate number of legs that the tracemaker had although striations scratchmarks from a single leg may overlap or be repeated RusophycusTemporal range Early Cambrian Early Triassic PreꞒ Ꞓ O S D C P T J K Pg NRusophycus trace fossil from the Ordovician of southern Ohio Scale bar is 10 mm Trace fossil classificationDomain EukaryotaKingdom AnimaliaPhylum ArthropodaIchnogenus RusophycusJ Hall 1852Both Rusophycus and Cruziana are typically associated with trilobites but can also be made by other arthropods 3 Rusophycus is known from sediments dating to the earliest Cambrian Period somewhat before the first appearance trilobite fossils and from the Triassic Period after the Permian extinction of trilobites indicating that other producers could make the trace 4 References edit Baldwin C T 1977 Rusophycus morgati an asaphid produced trace fossil from the Cambro Ordovician of Brittany and Northwest Spain Journal of Paleontology 51 411 425 Garlock T L Isaacson P E 1977 An occurrence of a Cruziana population in the Moyer Ridge Member of the Bloomsberg Formation Late Silurian Snyder County Pennsylvania Journal of Paleontology 51 2 282 287 JSTOR 1303607 Woolfe K 1990 Trace fossils as paleoenvironmental indicators in the Taylor group Devonian of Antarctica Palaeogeography Palaeoclimatology Palaeoecology 80 3 4 301 310 Bibcode 1990PPP 80 301W doi 10 1016 0031 0182 90 90139 X Donovan S K 2010 Cruziana and Rusophycus trace fossils produced by trilobites in some cases Lethaia 43 2 283 284 doi 10 1111 j 1502 3931 2009 00208 x nbsp This trace fossil related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Rusophycus amp oldid 1198871266, wikipedia, wiki, book, books, library,
