own weight via an attachment disc. Graptolites with relatively few branches were derived from the dendroid graptolites at the beginning of the Ordovician...

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...

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:...

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...

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...

Graptolites, which evolved in the preceding Cambrian period, thrived in the oceans. This includes the distinctive Nemagraptus gracilis graptolite fauna...

includes those with a clearly discernable neck and an internal prosome. The graptolites are colonial organic walled fossils which also occurred from the Ordovician...

branched tentacles, and has a short, shield-shaped proboscis. The extinct graptolites, colonial animals whose fossils look like tiny hacksaw blades, lived...

crinoids (only articulates survived), and all eurypterids, trilobites, graptolites, hyoliths, edrioasteroid crinozoans, blastoids and acanthodians. Ouachita...

Middle Cambrian, it is also considered to be the only living genus of graptolites. Rhabdopleura is the best studied pterobranch in developmental biology...

It bears strong similarity to the graptolites - indeed for some time it was misclassified as a dendroid graptolite. Bengtson, S.; Urbanek, A. (1986),...

Ortega, G.D.C. (2020). "Darriwilian (Middle ordovician) conodonts and graptolites from the cerro la chilca section, central precordillera, Argentina"....

Geological Survey Bulletin. 808: 40–42. Decker, Charles E. (1935). "Graptolites of the Sylvan Shale of Oklahoma and Polk Creek Shale of Arkansas". Journal...

Formation is an Upper Cambrian geologic formation in Wisconsin. It contains graptolites. Earth sciences portal Paleontology portal List of fossiliferous stratigraphic...

Artur A.; Meireles, Carlos; González-Clavijo, E. (1 June 2006). "Silurian graptolite biostratigraphy of the Galicia – Tras-os-Montes Zone (Spain and Portugal)"...

System Time span formality Formal Lower boundary definition FAD of the Graptolite Monograptus uniformis Lower boundary GSSP Klonk, Czech Republic 49°51′18″N...

Axonophora is an extinct suborder of graptolites. It primarily consists of the biserial graptolites, and also includes the retiolitids and monograptids...

fluctivagus. Where these conodonts are not found the appearance of planktonic graptolites or the trilobite Jujuyaspis borealis can be used. The boundary also corresponds...

been found in the Bromide Formation of green algae, sponges, corals, graptolites, lampshells, moss animals, trilobites, clam shrimps, molluscs, several...

water or sediment. Particularly notable is the presence of bryozoa and graptolites, forms that are absent in the Cambrian period. Diverse echinoderms indicate...

clade as the extinct graptolites, and phylogenetic analysis suggests that the pterobranchs are living members of the graptolite clade. Pterobranchs are...

ancestor of the Chordata [human] lineage, Hemichordata (acorn worms and graptolites) and Echinodermata (starfish, sea urchins, sea cucumbers, etc.), probably...

commonly called acorn worms, and the Pterobranchia, which includes the graptolites. A third class, Planctosphaeroidea, is proposed based on a single species...

mass-extinction events that seriously affected planktonic forms like conodonts, graptolites, and some groups of trilobites (Agnostida and Pytchopariida, which completely...

1835 Time span formality Formal Lower boundary definition FAD of the Graptolite Akidograptus ascensus Lower boundary GSSP Dob's Linn, Moffat, United Kingdom...

volcanogenic and cherty-carbonate sediments containing in abundance graptolites, bivalves, brachiopods, fishes, foraminiferans, corals, radiolarias,...

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...

Pterobranchia, which are small, worm-shaped animals, are the only surviving graptolites. Members belong to the hemichordates. Species in this order are sessile...

1974. The boundaries were established by the fauna of conodonts and/or graptolites. In 1995, the Subcommission on Ordovician Stratigraphy, with the support...

The Mazarn Shale is an Early Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. This interval was first described in 1892...