He bore reservations about its referral to the genus, and he recognized that it possibly pertained to another genus. [2][3][4], In December 1867 Turner and others from Fort Wallace returned to the site and recovered much of the vertebral column, as well as concretions that contained other bones; the material had a combined weight of 360 kilograms (800 lb). [23] In his 1869 description of Elasmosaurus, Cope estimated the length of the animal by summing up vertebral lengths and estimations of missing parts, resulting in a total length of 13.1 meters (43 ft). [8] In 1962 Welles considered P. constrictus to be a nomen dubium, given its fragmentary nature. /A << There is no reason why a large aquatic amphibian...a relic species could not inhabit these Northern Hemisphere cold deep water lakes. endobj [63] Despite its reassignment and the loss of its material, L. morgani is often considered an archetypal elasmosaurid. If sightings can be believed, the Loch Ness Monster is an incredible beast. It probably had six teeth in each premaxilla, and the teeth preserved there were formed like large fangs. [38], Topology A: Benson et al. Other invertebrates known to have lived in this sea include various species of rudists, crinoids and cephalopods (including squids and ammonites). It was really a cardboard cutout mounted on a toy submarine. Thus, Elasmosaurus would have been unable to swim in one direction while moving its head and neck either horizontally or vertically in a different direction. Gastroliths may also not have been recognized as such during collection, since such stones were not reported from a plesiosaur until ten years after. However, a few years ago one of the people involved confessed that the picture had been a fraud. endobj [32], Williston named a number of other new Elasmosaurus species in his 1906 revision. /S /URI 5 0 obj .mw-parser-output table.clade{border-spacing:0;margin:0;font-size:100%;line-height:100%;border-collapse:separate;width:auto}.mw-parser-output table.clade table.clade{width:100%;line-height:inherit}.mw-parser-output table.clade td.clade-label{width:0.7em;padding:0 0.15em;vertical-align:bottom;text-align:center;border-left:1px solid;border-bottom:1px solid;white-space:nowrap}.mw-parser-output table.clade td.clade-fixed-width{overflow:hidden;text-overflow:ellipsis}.mw-parser-output table.clade td.clade-fixed-width:hover{overflow:visible}.mw-parser-output table.clade td.clade-label.first{border-left:none;border-right:none}.mw-parser-output table.clade td.clade-label.reverse{border-left:none;border-right:1px solid}.mw-parser-output table.clade td.clade-slabel{padding:0 0.15em;vertical-align:top;text-align:center;border-left:1px solid;white-space:nowrap}.mw-parser-output table.clade td.clade-slabel:hover{overflow:visible}.mw-parser-output table.clade td.clade-slabel.last{border-left:none;border-right:none}.mw-parser-output table.clade td.clade-slabel.reverse{border-left:none;border-right:1px solid}.mw-parser-output table.clade td.clade-bar{vertical-align:middle;text-align:left;padding:0 0.5em;position:relative}.mw-parser-output table.clade td.clade-bar.reverse{text-align:right;position:relative}.mw-parser-output table.clade td.clade-leaf{border:0;padding:0;text-align:left}.mw-parser-output table.clade td.clade-leafR{border:0;padding:0;text-align:right}.mw-parser-output table.clade td.clade-leaf.reverse{text-align:right}.mw-parser-output table.clade:hover span.linkA{background-color:yellow}.mw-parser-output table.clade:hover span.linkB{background-color:green}, Topology B: Otero (2016),[38] with clade names following O'Gorman (2020)[80], Elasmosaurids were fully adapted to life in the ocean, with streamlined bodies and long paddles that indicate they were active swimmers. /URI (http://oogoro.easterndns.com/Czk-b) 15 0 obj Elasmosaurus vs plesiosaurus Elasmosaurus vs plesiosaurus. ��9���F�5.���\�x�'g��U[�#pj�Y*\8~,�:P�cL\�j�*]Ӄ�W������+a/�d��� ��aZ���J߯:Xڣ�f�Q�{+L��ǹ��M震#9�v@wc���>A| l�sf�����j*P���u�J583g��yM��r���ϳ��XU���[5)�8�B1��z8js�f �*. [78] In 2020, O'Gorman formally synonymized Styxosaurinae with Elasmosaurinae based on the inclusion of Elasmosaurus within the group, and also provided a list of diagnostic characteristics for the clade. One of these was E. chilensis, based on the Chilean Plesiosaurus chilensis named from a single tail vertebra by Claude Gay in 1848. Nothing was subsequently mentioned about their loss by Hawkins or Cope. (?) The neck alone was around 7.1 meters (23 ft) long. >> [22], Unlike those of many other long-necked animals, the individual neck vertebrae were not particularly elongated; rather, the extreme neck length was achieved by a much increased number of vertebrae. >> That's probably why they are only seen infrequently, they might even prefer to be abroad at night. The neural arches of these vertebrae were very thin and rather high, which gave the neural canal (the opening through the middle of the vertebrae) a triangular outline when seen from the back. /Type /Action [3] Elasmosaurus was one of few plesiosaurs known from the New World at the time, and the first recognized member of the long-necked family of plesiosaurs, the Elasmosauridae. << [28] Glenn Storrs considered both to be indeterminate elasmosaurids in 1999;[45] in the same year, Carpenter assigned both to Styxosaurus snowii. /Rect [417.120000 542 478.560000 552.559999 ] 2 . [22][15][2], The neural arches of the neck vertebrae were well fused to the centra, leaving no visible sutures, and the neural canal was narrow in the front vertebrae, becoming more prominently developed in the hind vertebrae, where it was as broad as high, and almost circular. [34] In 1995 Nathalie Bardet and Pascal Godefroit also recognized it as an elasmosaurid, albeit indeterminate. /Border [0 0 0] One thing people often forget about Elasmosaurus, and other marine reptiles, is that these creatures had to surface occasionally for air. /Border [0 0 0] /S /URI While they were incomplete, Persson recognized that their proportions and the shape of their articular ends differed greatly from pliosauroids, and instead agreed well with elasmosaurids. /Creator (�� w k h t m l t o p d f 0 . 799.279999 0] Has any attempts to determine if anything in the Loch echo locates been made?

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