Lichida is an order of typically spiny trilobite that lived from the Furongian to the Devonian period.[2] These trilobites usually have 8–13 thoracic segments.[1] Their exoskeletons often have a grainy texture or have wart or spine-like tubercles. Some species are extraordinarily spiny, having spiny thoracic segments that are as long or longer than the entire body, from cephalon (head) to pygidium (tail). The sections of the pygidia are leaf-like in shape and also typically end in spines.
The order is divided into two families, Lichidae, and Lichakephalidae.[1] Some experts group the families of the closely related order Odontopleurida within Lichida, too, whereupon the family is then divided into three superfamilies, Dameselloidea, containing the family Damesellidae, Lichoidea, containing the families Lichidae and Lichakephalidae, and Odontopleuroidea, containing the family Odontopleuridae.
Lichids are some of the largest trilobites, with the second and third largest trilobites (Uralichas hispanicus, and Teratapsis grandis) being in the order[3]
Margaret J. Campbell & Brian D. E. Chatterton (2009). "Silurian lichid trilobites from northwestern Canada: ontogeny and phylogeny of lichids". Journal of Paleontology. 83 (2): 263–279. Bibcode:2009JPal...83..263C. doi:10.1666/07-140R1.1. S2CID 86082595.
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lichida, order, typically, spiny, trilobite, that, lived, from, furongian, devonian, period, these, trilobites, usually, have, thoracic, segments, their, exoskeletons, often, have, grainy, texture, have, wart, spine, like, tubercles, some, species, extraordina. Lichida is an order of typically spiny trilobite that lived from the Furongian to the Devonian period 2 These trilobites usually have 8 13 thoracic segments 1 Their exoskeletons often have a grainy texture or have wart or spine like tubercles Some species are extraordinarily spiny having spiny thoracic segments that are as long or longer than the entire body from cephalon head to pygidium tail The sections of the pygidia are leaf like in shape and also typically end in spines LichidaTemporal range Furongian Frasnian PreꞒ Ꞓ O S D C P T J K Pg N Terataspis grandis Scientific classification Domain Eukaryota Kingdom Animalia Phylum Arthropoda Class Trilobita Order LichidaMoore 1959 Families 1 Lichidae Lichakephalidae Akantharges trilobite fossil The order is divided into two families Lichidae and Lichakephalidae 1 Some experts group the families of the closely related order Odontopleurida within Lichida too whereupon the family is then divided into three superfamilies Dameselloidea containing the family Damesellidae Lichoidea containing the families Lichidae and Lichakephalidae and Odontopleuroidea containing the family Odontopleuridae Lichids are some of the largest trilobites with the second and third largest trilobites Uralichas hispanicus and Teratapsis grandis being in the order 3 Contents 1 Taxa traditionally placed within Lichida 1 1 Lichidae 1 2 Lichakephalidae 2 References 3 Further reading 4 External linksTaxa traditionally placed within Lichida editAs mentioned earlier the order Lichida is divided into two families Lichidae edit Acanthopyge Akantharges Allolichas Amphilichas Apatolichas Arctinurus Autoloxolichas Borealarges Ceratarges Conolichas Craspedarges Dicranogmus Dicranopeltis Echinolichas Eifliarges Gaspelichas Hemiarges Homolichas Hoplolichas Hoplolichoides Jasperia Leiolichas Lichas Lobopyge Lyralichas Mephiarges Metaleiolichas Metalichas Metopolichas Neolichas Nipponarges Ohleum Oinochoe Otarozoum Paraleiolichas Perunaspis Platylichas Probolichas Pseudotupolichas Radiolichas Richterarges Rontrippia Terataspis Terranovia Trimerolichas Trochurus Uralichas Uripes Lichakephalidae edit Acidaspidella Acidaspides Acidaspidina Archikainella Belovia Bestjubella Brutonia Colossaspis Eoacidaspis Lichakephalus Lichokephalina Metaacidaspis Paraacidaspis UsovianaReferences edit a b c S M Gon III January 1 2008 Pictorial guide to the order Lichida Retrieved October 24 2013 H B Whittington 2002 Lichidae Trilobita morphology and classification Journal of Paleontology 76 2 306 320 doi 10 1666 0022 3360 2002 076 lt 0306 LTMAC gt 2 0 CO 2 JSTOR 1307144 The World s Largest Trilobites Further reading editMargaret J Campbell amp Brian D E Chatterton 2009 Silurian lichid trilobites from northwestern Canada ontogeny and phylogeny of lichids Journal of Paleontology 83 2 263 279 Bibcode 2009JPal 83 263C doi 10 1666 07 140R1 1 S2CID 86082595 External links edit nbsp Wikimedia Commons has media related to Lichida nbsp Data related to Lichida at Wikispecies nbsp This Lichida related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Lichida amp oldid 1192342791, wikipedia, wiki, book, books, library,
