Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Stephen E. Speyer"'
Autor:
Stephen E. Speyer, Gregory D. Edgecombe, Allen S. Hunt, Brian D. E. Chatterton, Richard A. Fortey
Publikováno v:
Journal of Paleontology. 68:523-540
Protaspides and later growth stages are described and discussed for the Ordovician trinucleid trilobite Cryptolithus tesselatus Green and the raphiophorid Lonchodomas chaziensis Shaw. A small triangular rostral plate is described for a single protasp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e18701b103eb549f2e4d08acd06ddb1
https://doi.org/10.1017/s0022336000025907
https://doi.org/10.1017/s0022336000025907
Publikováno v:
Sedimentary Geology. 87:25-37
Deposits in the Sulaiman foothills and Zinda Pir Dome in west-central Pakistan provide new insight into the critical early Miocene record of Himalayan Foreland sedimentation and paleobiology. The Chitarwata Formation, which underlies the Vihowa Forma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ed71697d80e1ac8f7ec605d0e9d1f30
https://doi.org/10.1016/0037-0738(93)90034-3
https://doi.org/10.1016/0037-0738(93)90034-3
Publikováno v:
Short Courses in Paleontology. 3:137-156
Since Barrande (1852) first illustrated a trilobite larva, aspects of trilobite ontogeny and early development have received a great deal of attention (see Beecher, 1895; Størmer, 1942; Whittington, 1957; Hu, 1971; Chatterton, 1980). Much of this li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26c0b154d853ba32b1f5985779e809c7
https://doi.org/10.1017/s247526300000177x
https://doi.org/10.1017/s247526300000177x
Publikováno v:
Short Courses in Paleontology. 3:116-136
Trilobites, like most arthropods, grew through a series of discrete increments (known as instars). The moulted sclerites accumulated in the sediment and were potentially preserved. This mode of growth provides us with a tangible record of morphologic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46b3eeb4b7adc7bab8da6a62882054ab
https://doi.org/10.1017/s2475263000001768
https://doi.org/10.1017/s2475263000001768
Publikováno v:
Journal of Paleontology. 64:847-849
r-The premise that derived similarities in early ontogeny reflect proximity of common ancestry provides a framework for evaluating relationships within the trilobite subfamily Encrinurinae Angelin and allied taxa on the basis of larval characters. Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b5578a82642faf40d334586a9e42dfb
https://doi.org/10.1017/s0022336000019065
https://doi.org/10.1017/s0022336000019065
Autor:
A. R. Palmer, A. W. A. Rushton, E. N. K. Clarkson, N. V. Wilmot, Robert M. Owens, W. T. Chang, J. H. Shergold, P. A. Jell, S. R. A. Kelly, Brian D. E. Chatterton, Richard A. Fortey, H. B. Whittington, J. R. Laurie, W. T. Dean, Stephen E. Speyer, L. N. Repina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79f0bf1b66f4357fe32d0971cca4a598
https://doi.org/10.17161/dt.v0i0.5617
https://doi.org/10.17161/dt.v0i0.5617
Publikováno v:
Paleobiology. 15:118-132
Differences in the larval ecology of Ordovician trilobites directly influenced the outcome of the Ashgill extinction (latest Ordovician) and indirectly governed the pattern of evolution in post-Ordovician trilobites. Larval ecology also affected surv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3091c74d57e05c8352eea30888ae1b74
https://doi.org/10.1017/s0094837300009313
https://doi.org/10.1017/s0094837300009313
Autor:
Stephen E. Speyer
Publikováno v:
Lethaia. 21:121-138
Although it is common knowledge that many trilobites enrolled, behavioral and functional aspects of enrollment are not at all well understood. Taphonomic details portrayed by enrolled trilobites in the Middle Devonian Hamilton Group (New York State)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b865cd9f0c8faec23c17c0c3964b1f16
https://doi.org/10.1111/j.1502-3931.1988.tb00803.x
https://doi.org/10.1111/j.1502-3931.1988.tb00803.x
Publikováno v:
Historical Biology. 3:27-60
Silicified trilobite faunas yield a well preserved and abundant record of early development in many taxa. Although their morphologies are well known, protaspid larvae are poorly understood in terms...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90c1bdfd111b448de3b3ef3ff7d3a196
https://doi.org/10.1080/08912968909386512
https://doi.org/10.1080/08912968909386512