Osteology and systematic position of the Eocene salmonid Eosalmo driftwoodensis Wilson from western North America

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	Osteology and systematic position of the Eocene salmonid Eosalmo driftwoodensis Wilson from western North America
	Wilson, MVH ; Li, GQ ; Wilson, MVH (reprint author), Univ Alberta, Dept Sci Biol, Paleontol Vertebres Lab, Edmonton, AB T6G 2E9, Canada.
	1999-03-01
发表期刊	ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN	0024-4082
卷号	125 期号:3 页码:279-311
文章类型	Article
摘要	The fossil salmonid dagger Eosalmo driftwoodensis was originally described from fragmentary specimens. Study of new material of this fossil species confirms that it is a stem-group salmonine, with a mixture of primitive and derived salmonine features in its skull, but with its postcranial skeleton essentially of modern salmonine construction. Two autapomophies define the genus dagger Eosalmo: a long anterodorsal process of the subopercle meeting the dorsal edge of the bone at an angle of about 60 degrees, and a thin dermal basihyal plate apparently lacking teeth. Its salmonine relationship is supported by eight derived features: (I) posterior part of frontal widely expanded above autosphenotic, (2) hyomandibular fossa on pterotic long, (3) posterior part of endopterygoid extending posteriorly and broadly overlapped by both metapterygoid and quadrate, (4) premaxillary process of maxilla extending dorsally at an angle larger than 10 degrees, (5) infraorbitals 3 to 5 narrow and covering less than anterior half of hyomandibula, (6) presence of suprapreopercle, (7) anterior end of preopercular canal on horizontal arm distinctly turning to anteroventral corner of preopercle, (8) first uroneural amplified into large fan-shaped stegural, and (9) scales small, with more than two lateral line scales per vertebral centrum. Salmonidae are a monophyletic family defined by at least three synapomorphies: posterior surface of epiotic with sulcus, peg-and-socket connection in caudal skeleton, and tetraploid karyotype. Within the Salmonidae, Thymallinae and Salmoninae form a clade based on features from premaxilla, supramaxilla, anguloarticular, and supraorbital. (C) 1999 The Linnean Society of London.; The fossil salmonid dagger Eosalmo driftwoodensis was originally described from fragmentary specimens. Study of new material of this fossil species confirms that it is a stem-group salmonine, with a mixture of primitive and derived salmonine features in its skull, but with its postcranial skeleton essentially of modern salmonine construction. Two autapomophies define the genus dagger Eosalmo: a long anterodorsal process of the subopercle meeting the dorsal edge of the bone at an angle of about 60 degrees, and a thin dermal basihyal plate apparently lacking teeth. Its salmonine relationship is supported by eight derived features: (I) posterior part of frontal widely expanded above autosphenotic, (2) hyomandibular fossa on pterotic long, (3) posterior part of endopterygoid extending posteriorly and broadly overlapped by both metapterygoid and quadrate, (4) premaxillary process of maxilla extending dorsally at an angle larger than 10 degrees, (5) infraorbitals 3 to 5 narrow and covering less than anterior half of hyomandibula, (6) presence of suprapreopercle, (7) anterior end of preopercular canal on horizontal arm distinctly turning to anteroventral corner of preopercle, (8) first uroneural amplified into large fan-shaped stegural, and (9) scales small, with more than two lateral line scales per vertebral centrum. Salmonidae are a monophyletic family defined by at least three synapomorphies: posterior surface of epiotic with sulcus, peg-and-socket connection in caudal skeleton, and tetraploid karyotype. Within the Salmonidae, Thymallinae and Salmoninae form a clade based on features from premaxilla, supramaxilla, anguloarticular, and supraorbital. (C) 1999 The Linnean Society of London.
关键词	Eocene Eosalmo North America Osteology Phylogeny Stem-group Salmonine
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	FRESH-WATER FISHES ; MITOCHONDRIAL-DNA ; SALVELINUS ; TROUT ; DIVERGENCE ; PHYLOGENY ; NAMES
收录类别	SCI
语种	英语
WOS研究方向	Zoology
WOS类目	Zoology
WOS记录号	WOS:000079678100001
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3965
专题	中科院古脊椎所（2000年以后）
通讯作者	Wilson, MVH (reprint author), Univ Alberta, Dept Sci Biol, Paleontol Vertebres Lab, Edmonton, AB T6G 2E9, Canada.
作者单位	1.Univ Alberta, Dept Sci Biol, Paleontol Vertebres Lab, Edmonton, AB T6G 2E9, Canada 2.Acad Sinica, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Wilson, MVH,Li, GQ,Wilson, MVH . Osteology and systematic position of the Eocene salmonid Eosalmo driftwoodensis Wilson from western North America[J]. ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,1999,125(3):279-311.
APA	Wilson, MVH,Li, GQ,&Wilson, MVH .(1999).Osteology and systematic position of the Eocene salmonid Eosalmo driftwoodensis Wilson from western North America.ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,125(3),279-311.
MLA	Wilson, MVH,et al."Osteology and systematic position of the Eocene salmonid Eosalmo driftwoodensis Wilson from western North America".ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 125.3(1999):279-311.

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