Goniatite: Difference between revisions

Browse history interactively

← Previous edit

Content deleted Content added

VisualWikitext

Revision as of 15:43, 5 April 2019 edit DavidLupin7 (talk \| contribs) Extended confirmed users 1,360 edits No edit summary Tags: Mobile edit Mobile web edit ← Previous edit		Latest revision as of 15:25, 21 June 2024 edit undo Lavalizard101 (talk \| contribs) Extended confirmed users 26,243 edits removed Category:Cephalopod orders; added Category:Prehistoric cephalopod orders using HotCat
(14 intermediate revisions by 10 users not shown)
Line 1: {{Short description\|Extinct order of molluscs}} {{Automatic taxobox \| fossil_range = {{fossil range\|390\|251.4}}[[Middle Devonian]] – [[Late Permian]] \| image = Fossile J 2.jpg \| image_caption = A polished ~~Goniatite~~goniatite [[fossil]] \| taxon = Goniatitida \| authority = [[Alpheus Hyatt\|Hyatt]], 1884 Line 11 ⟶ 12: }} '''Goniatids''', informally ~~Goniatites~~goniatites, are [[Ammonoidea\|ammonoid]] ~~cephalopods~~[[cephalopod]]s that form the order '''Goniatitida''', derived from the more primitive [[Agoniatitida]] during the Middle [[Devonian]] some 390 million years ago (around [[Eifelian]] stage). Goniatites (~~goniatitida~~goniatitids) survived the [[Late Devonian extinction]] to flourish during the [[Carboniferous]] and [[Permian]] only to become [[Permian–Triassic extinction event\|extinct at the end of the Permian]] some 139 million years later. == Morphology == [[File:Imitoceras rotatorium (ammonite).jpg\|left\|thumb\|217x217px\|The [[Prionoceratidae\|prionoceratid]] ''[[Imitoceras\|Imitoceras rotatorium]]'', showing characteristic goniatitic sutures. Early [[Carboniferous]], [[Rockford Limestone]], [[Rockford, Illinois\|Rockford]], [[Illinois]].]] All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it [[buoyancy]] during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through a ventral siphuncle. The general morphology and habit of goniatites was probably similar to that of their later relatives the [[Ammonitida\|ammonites]], being free swimming and possessing a head with two well developed eyes and arms (or [[tentacle]]s). Line 27 ⟶ 28: == Ecology == Ecologically, goniatites were limited to environments of normal-marine salinity—as appears to be the case for all cephalopods throughout their history. Goniatites are much more abundant and speciose in sediments that represent ~~called~~ [[Inland sea (geology)\|epicontinental]] seas than they are in those that represent the open ocean. Within these inland seas, goniatites' greatest abundance and diversity appears to have been achieved in deeper offshore and [[Oceanic basin\|basinal]] environments rather than in nearshore environments. Known nearshore (e.g., [[lagoon]]al) occurrences have generally been ascribed to wash-in of shells from offshore waters. Due to lack of strong evidence for any particular life mode (e.g., [[benthos\|benthic]] [[nekton]]ic, [[plankton]]ic), it remains unclear what resources goniatites were capitalizing on in these offshore environments. Only a few goniatites' full [[wikt:Special:Search/trophic\|trophic]] apparatuses have ever been described, and reports of stomach contents in these creatures' fossils remain questionable at best. However, goniatites clearly lacked the calcified jaw apparatuses developed in later [[Ammonitida\|ammonites]]; this has been cited as evidence against their having a [[durophagy\|durophagous]] (shell-crushing) diet. Line 50 ⟶ 51: [[Category:Middle Devonian first appearances]] [[Category:Lopingian extinctions]] [[Category:~~Fossil~~Prehistoric ~~taxa~~cephalopod ~~described in 1884~~orders]]