The generic name, Ogygiocarella, refers to "Ogygia", the seventh daughter of Amphion and Niobe, which name is combined with "-care-", from the Greek "akares", meaning short, and finally "-ella", the diminutive form.[citation needed]
History
Ogygiocarella is arguably the first trilobite that was scientifically described. Rev. Edward Lhwyd[4] published in 1698 in The Philosophical Transactions of the Royal Society, the oldest scientific journal in the English language, part of his letter “Concerning Several Regularly Figured Stones Lately Found by Him", that was accompanied by a page of etchings of fossils.[5] One of his etchings figured a trilobite he found near Llandeilo, probably on the grounds of Lord Dynefor's castle, he described as “… the skeleton of some flat Fish …".[6]
Distribution
O. debuchii occurs in the Middle Ordovician of Wales (late Llanvirn, Lampeter Velfrey, Abereiddi Bay).[citation needed]
undetermined Ogygiocarella specimens have been found in the Middle Ordovician of Wales (early to late Llandeilo, Llandeilo Sandstone-siltstone facies, Llandeilo; Pencerrig Lake, near Builth Wells, Powys).[citation needed]
Description
Drawing of O. debuchii by Rev. Edward Lhwyd, made in 1698
Ogygiocarella has a very flat calcified dorsal exoskeleton, with an oval outline (about 1½× longer than wide). The headshield (or cephalon) is 2½× wider than long, and of equal size as the tailshield (or pygidium), a state called isopygeous. Both are semicircular. The backcorners of the cephalon end in so-called genal spines that stick backwards approximately to the 6th thorax segment. The central raised area of the cephalon (or glabella) has 4 pairs of furrows and expands in front of the eyes. The eyes are small, close to the glabella and in the rear half of the cephalon. The dorsal facial sutures, that split when moulding, arch from the front of the eye and pass in front of the glabella. The suture follows the top of the visual surface, as in all trilobites, and from there cut backwards and outwards at approximately 45° to reach the posterior margin of the cephalon approximately halfway between the glabella and the lateral border. As usual for members of the family Asaphidae, it has 8 articulating segments in the middle part of the body (or thorax). The axis is about half as wide as the ribs (or pleurae) to each of the sides. In the thorax the axis tapers slightly towards the back. In the pygidium the axis tapers stronger and terminates a short distance from the margin in a roundish endpiece. It has 10-14 ribs on each side of the axis, which fade-out in the border that is as wide as the axis.[7]
References
^BRONGNIART, A. 1822. Les Trilobites. pp. 1–65, pls. 1–4 in Brongniart, A. & Desmarest A. G. Histoire Naturelle des Crustacés Fossiles. 154 pp., 11 pls. Paris.
^S. M. GON III. "Order Asaphida". from the original on 6 January 2011.
^JELL, P. A.; ADRAIN, J. M. (30 August 2002). "Available Generic Names for Trilobites" (PDF). Memoirs of the Queensland Museum. Brisbane. 48 (2): 413, 466. ISSN 0079-8835.
^"Cultures of Knowledge: An Intellectual Geography of the Seventeenth-Century Republic of Letters » Edward Lhwyd".
^John J. McKay (22 November 2011). "The first trilobite". OhioLINK ETD Center. Retrieved 3 October 2012.
^HUGHES, C. P. (1979). "The Ordovician trilobite faunas of the Builth-Llandrindod Inlier, central Wales. Part. 3". Bulletin of the British Museum (Natural History), Geology. 32: 109–181.
External links
"Ogygiocarella angustissima". Shinichi Kato.
January 21, 2023
ogygiocarella, brongniart, 1822, genus, asaphid, trilobites, occurred, during, middle, ordovician, temporal, range, middle, ordovician, preꞒ, debuchii, brongniart, 1822, from, meadowtown, formation, llandeilo, group, middleton, series, abereiddian, stage, mead. Ogygiocarella Brongniart 1822 1 is a genus of asaphid trilobites It occurred during the Middle Ordovician 2 3 OgygiocarellaTemporal range Middle Ordovician PreꞒ Ꞓ O S D C P T J K Pg NOgygiocarella debuchii Brongniart 1822 from the Meadowtown Formation Llandeilo Group Middleton Series Abereiddian Stage Meadowtown Shropshire Length 8 5 cm Scientific classificationKingdom AnimaliaPhylum ArthropodaClass TrilobitaOrder AsaphidaFamily AsaphidaeGenus OgygiocarellaHarrington amp Leanza 1957Type speciesAsaphus debuchiiSpeciesO debuchii Brongniart 1822 O angustissima Salter 1865 Ogygites angustissima Contents 1 Etymology 2 History 3 Distribution 4 Description 5 References 6 External linksEtymology EditThe generic name Ogygiocarella refers to Ogygia the seventh daughter of Amphion and Niobe which name is combined with care from the Greek akares meaning short and finally ella the diminutive form citation needed History EditOgygiocarella is arguably the first trilobite that was scientifically described Rev Edward Lhwyd 4 published in 1698 in The Philosophical Transactions of the Royal Society the oldest scientific journal in the English language part of his letter Concerning Several Regularly Figured Stones Lately Found by Him that was accompanied by a page of etchings of fossils 5 One of his etchings figured a trilobite he found near Llandeilo probably on the grounds of Lord Dynefor s castle he described as the skeleton of some flat Fish 6 Distribution EditO debuchii occurs in the Middle Ordovician of Wales late Llanvirn Lampeter Velfrey Abereiddi Bay citation needed undetermined Ogygiocarella specimens have been found in the Middle Ordovician of Wales early to late Llandeilo Llandeilo Sandstone siltstone facies Llandeilo Pencerrig Lake near Builth Wells Powys citation needed Description Edit Drawing of O debuchii by Rev Edward Lhwyd made in 1698Ogygiocarella has a very flat calcified dorsal exoskeleton with an oval outline about 1 longer than wide The headshield or cephalon is 2 wider than long and of equal size as the tailshield or pygidium a state called isopygeous Both are semicircular The backcorners of the cephalon end in so called genal spines that stick backwards approximately to the 6th thorax segment The central raised area of the cephalon or glabella has 4 pairs of furrows and expands in front of the eyes The eyes are small close to the glabella and in the rear half of the cephalon The dorsal facial sutures that split when moulding arch from the front of the eye and pass in front of the glabella The suture follows the top of the visual surface as in all trilobites and from there cut backwards and outwards at approximately 45 to reach the posterior margin of the cephalon approximately halfway between the glabella and the lateral border As usual for members of the family Asaphidae it has 8 articulating segments in the middle part of the body or thorax The axis is about half as wide as the ribs or pleurae to each of the sides In the thorax the axis tapers slightly towards the back In the pygidium the axis tapers stronger and terminates a short distance from the margin in a roundish endpiece It has 10 14 ribs on each side of the axis which fade out in the border that is as wide as the axis 7 References Edit BRONGNIART A 1822 Les Trilobites pp 1 65 pls 1 4 in Brongniart A amp Desmarest A G Histoire Naturelle des Crustaces Fossiles 154 pp 11 pls Paris S M GON III Order Asaphida Archived from the original on 6 January 2011 JELL P A ADRAIN J M 30 August 2002 Available Generic Names for Trilobites PDF Memoirs of the Queensland Museum Brisbane 48 2 413 466 ISSN 0079 8835 Cultures of Knowledge An Intellectual Geography of the Seventeenth Century Republic of Letters Edward Lhwyd John J McKay 22 November 2011 The first trilobite OhioLINK ETD Center Retrieved 3 October 2012 FORTEY R A 2000 Trilobite Eyewitness to Evolution Knopf Doubleday Publishing Group ISBN 9780375706219 HUGHES C P 1979 The Ordovician trilobite faunas of the Builth Llandrindod Inlier central Wales Part 3 Bulletin of the British Museum Natural History Geology 32 109 181 External links Edit Ogygiocarella angustissima Shinichi Kato Retrieved from https en wikipedia org w index php title Ogygiocarella amp oldid 1118887543, wikipedia, wiki, book, books, library,
