own weight via an attachment disc. Graptolites with relatively few branches were derived from the dendroid graptolites at the beginning of the Ordovician...
35 KB (3,485 words) - 03:18, 26 November 2024
This list of graptolites is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be members...
42 KB (481 words) - 22:21, 17 July 2024
Dictyonema is a genus of dendroid graptolites in the order Dendroidea. Fossils of Dictyonema are found from the Upper Cambrian to the Devonian (age range:...
3 KB (241 words) - 07:02, 18 November 2024
Edinburgh Geologist. 41, pp. 10–15. Dalziel, I. W. D. 1979. The mythical graptolites of the South Orkney Islands. The Edinburgh Geologist. 6, pp. 2-9. Flowerdew...
4 KB (452 words) - 19:36, 22 August 2023
Nancy Kirk (section Graptolites)
took a vast majority of her time, especially her work on graptolites in the 1970s. Graptolites are marine invertebrate species that are believed to be...
15 KB (1,947 words) - 00:09, 11 September 2024
Graptolites, which evolved in the preceding Cambrian period, thrived in the oceans. This includes the distinctive Nemagraptus gracilis graptolite fauna...
79 KB (7,814 words) - 15:10, 19 December 2024
Chitinozoan (section Young graptolites)
includes those with a clearly discernable neck and an internal prosome. The graptolites are colonial organic walled fossils which also occurred from the Ordovician...
24 KB (2,881 words) - 06:03, 28 November 2024
branched tentacles, and has a short, shield-shaped proboscis. The extinct graptolites, colonial animals whose fossils look like tiny hacksaw blades, lived...
58 KB (5,278 words) - 12:48, 18 December 2024
crinoids (only articulates survived), and all eurypterids, trilobites, graptolites, hyoliths, edrioasteroid crinozoans, blastoids and acanthodians. Ouachita...
176 KB (10,065 words) - 06:53, 23 December 2024
It bears strong similarity to the graptolites - indeed for some time it was misclassified as a dendroid graptolite. Bengtson, S.; Urbanek, A. (1986),...
2 KB (150 words) - 04:00, 5 March 2021
Middle Cambrian, it is also considered to be the only living genus of graptolites. Rhabdopleura is the best studied pterobranch in developmental biology...
5 KB (371 words) - 15:45, 26 October 2024
Polk Creek Shale (section Graptolites)
Geological Survey Bulletin. 808: 40–42. Decker, Charles E. (1935). "Graptolites of the Sylvan Shale of Oklahoma and Polk Creek Shale of Arkansas". Journal...
4 KB (275 words) - 13:46, 29 October 2021
Ortega, G.D.C. (2020). "Darriwilian (Middle ordovician) conodonts and graptolites from the cerro la chilca section, central precordillera, Argentina"....
2 KB (159 words) - 23:24, 11 October 2024
Formation is an Upper Cambrian geologic formation in Wisconsin. It contains graptolites. Earth sciences portal Paleontology portal List of fossiliferous stratigraphic...
2 KB (69 words) - 08:06, 14 February 2024
Artur A.; Meireles, Carlos; González-Clavijo, E. (1 June 2006). "Silurian graptolite biostratigraphy of the Galicia – Tras-os-Montes Zone (Spain and Portugal)"...
128 KB (14,048 words) - 12:28, 10 December 2024
System Time span formality Formal Lower boundary definition FAD of the Graptolite Monograptus uniformis Lower boundary GSSP Klonk, Czech Republic 49°51′18″N...
69 KB (7,587 words) - 15:11, 19 December 2024
fluctivagus. Where these conodonts are not found the appearance of planktonic graptolites or the trilobite Jujuyaspis borealis can be used. The boundary also corresponds...
88 KB (9,308 words) - 15:10, 19 December 2024
Axonophora (redirect from Biserial graptolite)
Axonophora is an extinct suborder of graptolites. It primarily consists of the biserial graptolites, and also includes the retiolitids and monograptids...
3 KB (165 words) - 14:46, 7 February 2021
1872 – 18 November 1960) was a British geologist, known for her work on graptolites. Gertrude Elles was born on 8 October 1872. She was the youngest of six...
18 KB (2,327 words) - 23:25, 20 December 2024
Bromide Formation (section Graptolites)
been found in the Bromide Formation of green algae, sponges, corals, graptolites, lampshells, moss animals, trilobites, clam shrimps, molluscs, several...
24 KB (1,551 words) - 19:40, 18 November 2024
Fezouata Formation (section Graptolites)
water or sediment. Particularly notable is the presence of bryozoa and graptolites, forms that are absent in the Cambrian period. Diverse echinoderms indicate...
89 KB (4,572 words) - 04:25, 24 November 2024
clade as the extinct graptolites, and phylogenetic analysis suggests that the pterobranchs are living members of the graptolite clade. Pterobranchs are...
16 KB (1,232 words) - 01:22, 25 October 2024
ancestor of the Chordata [human] lineage, Hemichordata (acorn worms and graptolites) and Echinodermata (starfish, sea urchins, sea cucumbers, etc.), probably...
88 KB (3,574 words) - 10:30, 19 November 2024
1835 Time span formality Formal Lower boundary definition FAD of the Graptolite Akidograptus ascensus Lower boundary GSSP Dob's Linn, Moffat, United Kingdom...
59 KB (5,819 words) - 15:10, 19 December 2024
volcanogenic and cherty-carbonate sediments containing in abundance graptolites, bivalves, brachiopods, fishes, foraminiferans, corals, radiolarias,...
53 KB (6,287 words) - 13:57, 11 October 2024
commonly called acorn worms, and the Pterobranchia, which includes the graptolites. A third class, Planctosphaeroidea, is proposed based on a single species...
26 KB (2,733 words) - 04:59, 19 December 2024
lilies and brittle stars (Echinodermata) Acorn worms, cephalodiscids and graptolites (Hemichordata) Lancelets (Amphioxiformes) Salps, pyrosomes, doliolids...
45 KB (5,000 words) - 05:51, 14 December 2024
Pterobranchia, which are small, worm-shaped animals, are the only surviving graptolites. Members belong to the hemichordates. Species in this order are sessile...
6 KB (371 words) - 19:28, 13 July 2024
1974. The boundaries were established by the fauna of conodonts and/or graptolites. In 1995, the Subcommission on Ordovician Stratigraphy, with the support...
41 KB (4,049 words) - 12:32, 14 December 2024
Mazarn Shale (section Graptolites)
The Mazarn Shale is an Early Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. This interval was first described in 1892...
4 KB (236 words) - 08:18, 13 February 2024