FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1979852800> ?p ?o ?g. }

• W1979852800 endingPage "31" @default.
• W1979852800 startingPage "1" @default.
• W1979852800 abstract "This study investigates whether the recently described Cambrian fossil Haikouella (and the very similar Yunnanozoon) throws light on the longstanding problem of the origin of craniates. In the first rigorous cladistic analysis of the relations of this animal, we took 40 anatomical characters from Haikouella and other taxa (hemichordates, tunicates, cephalochordates, conodont craniates and other craniates, plus protostomes as the outgroup) and subjected these characters to parsimony analysis. The characters included several previously unrecognized traits of Haikouella, such as upper lips resembling those of larval lampreys, the thick nature of the branchial bars, a mandibular branchial artery but no mandibular branchial bar, muscle fibers defining the myomeres, a dark fibrous sheath that defines the notochord, conclusive evidence for paired eyes, and a large hindbrain and diencephalon in the same positions as in the craniate brain. The cladistic analysis produced this tree: (protostomes, hemichordates (tunicates, (cephalochordates, (Haikouella, (conodonts + other craniates))))), with the Haikouella + craniate clade supported by bootstrap values that ranged from 81-96%, depending on how the analysis was structured. Thus, Haikouella is concluded to be the sister group of the craniates. Alternate hypotheses that unite Haikouella with hemichordates or cephalochordates, or consider it a basal deuterostome, received little or no support. Although it is the sister group of craniates, Haikouella is skull-less and lacks an ear, but it does have neural-crest derivatives in its branchial bars. Its craniate characters occur mostly in the head and pharynx; its widely spaced, robust branchial bars indicate it ventilated with branchiomeric muscles, not cilia. Despite its craniate mode of ventilation, Haikouella was not a predator but a suspension feeder, as shown by its cephalochordate-like endostyle, and tentacles forming a screen across the mouth. Haikouella was compared to pre-craniates predicted by recent models of craniate evolution and was found to fit these predictions closely. Specifically, it fits Northcutt and Gans' prediction that the change from ciliary to muscular ventilation preceded the change from suspension feeding to predatory feeding; it fits Butler's claim that vision was the first craniate sense to start elaborating; it is consistent with the ideas of Donoghue and others about the ancestor of conodont craniates; and, most strikingly, it resembles Mallatt's prediction of the external appearance of the ancestral craniate head. By contrast, Haikouella does not fit the widespread belief that ancestral craniates resembled hagfishes, because it has no special hagfish characters. Overall, Haikouella agrees so closely with recent predictions about pre-craniates that we conclude that the difficult problem of craniate origins is nearly solved." @default.
• W1979852800 created "2016-06-24" @default.
• W1979852800 creator A5000584262 @default.
• W1979852800 creator A5037203763 @default.
• W1979852800 date "2003-08-01" @default.
• W1979852800 modified "2023-10-16" @default.
• W1979852800 title "Fossil sister group of craniates: Predicted and found" @default.
• W1979852800 cites W1510855520 @default.
• W1979852800 cites W1524597810 @default.
• W1979852800 cites W1633846818 @default.
• W1979852800 cites W1662088905 @default.
• W1979852800 cites W1662819572 @default.
• W1979852800 cites W1681265033 @default.
• W1979852800 cites W1848524608 @default.
• W1979852800 cites W1934375499 @default.
• W1979852800 cites W1943910376 @default.
• W1979852800 cites W1964567395 @default.
• W1979852800 cites W1967572981 @default.
• W1979852800 cites W1969559567 @default.
• W1979852800 cites W1975105205 @default.
• W1979852800 cites W1976798874 @default.
• W1979852800 cites W1978859067 @default.
• W1979852800 cites W1980257238 @default.
• W1979852800 cites W1988156899 @default.
• W1979852800 cites W1989681239 @default.
• W1979852800 cites W1991928580 @default.
• W1979852800 cites W1993898367 @default.
• W1979852800 cites W1994930183 @default.
• W1979852800 cites W1997035797 @default.
• W1979852800 cites W1998342476 @default.
• W1979852800 cites W2001506922 @default.
• W1979852800 cites W2001831384 @default.
• W1979852800 cites W2002640349 @default.
• W1979852800 cites W2005302341 @default.
• W1979852800 cites W2005701741 @default.
• W1979852800 cites W2011665395 @default.
• W1979852800 cites W2013328624 @default.
• W1979852800 cites W2014352265 @default.
• W1979852800 cites W2015196002 @default.
• W1979852800 cites W2022906661 @default.
• W1979852800 cites W2023239949 @default.
• W1979852800 cites W2025823934 @default.
• W1979852800 cites W2027631333 @default.
• W1979852800 cites W2027928611 @default.
• W1979852800 cites W2030707749 @default.
• W1979852800 cites W2031514201 @default.
• W1979852800 cites W2034206853 @default.
• W1979852800 cites W2034639595 @default.
• W1979852800 cites W2038847349 @default.
• W1979852800 cites W2041295305 @default.
• W1979852800 cites W2043344776 @default.
• W1979852800 cites W2056526309 @default.
• W1979852800 cites W2057797368 @default.
• W1979852800 cites W2062139176 @default.
• W1979852800 cites W2063600356 @default.
• W1979852800 cites W2074548659 @default.
• W1979852800 cites W2076729727 @default.
• W1979852800 cites W2078734202 @default.
• W1979852800 cites W2084070966 @default.
• W1979852800 cites W2086920518 @default.
• W1979852800 cites W2088299548 @default.
• W1979852800 cites W2089723817 @default.
• W1979852800 cites W2090490136 @default.
• W1979852800 cites W2092613043 @default.
• W1979852800 cites W2092770159 @default.
• W1979852800 cites W2099729045 @default.
• W1979852800 cites W2126839513 @default.
• W1979852800 cites W2127030917 @default.
• W1979852800 cites W2128919173 @default.
• W1979852800 cites W2137464835 @default.
• W1979852800 cites W2141959073 @default.
• W1979852800 cites W2143074018 @default.
• W1979852800 cites W2145802555 @default.
• W1979852800 cites W2158215008 @default.
• W1979852800 cites W2162521529 @default.
• W1979852800 cites W2168241269 @default.
• W1979852800 cites W2168818831 @default.
• W1979852800 cites W2170738418 @default.
• W1979852800 cites W2171516003 @default.
• W1979852800 cites W2172213203 @default.
• W1979852800 cites W2186186445 @default.
• W1979852800 cites W2223071885 @default.
• W1979852800 cites W2320172843 @default.
• W1979852800 cites W24882265 @default.
• W1979852800 cites W2892334870 @default.
• W1979852800 cites W35178079 @default.
• W1979852800 cites W4236104903 @default.
• W1979852800 cites W4240236016 @default.
• W1979852800 cites W4246844380 @default.
• W1979852800 cites W4250421569 @default.
• W1979852800 cites W4255910628 @default.
• W1979852800 cites W624275134 @default.
• W1979852800 cites W71040380 @default.
• W1979852800 cites W937254703 @default.
• W1979852800 cites W992016584 @default.
• W1979852800 doi "https://doi.org/10.1002/jmor.10081" @default.
• W1979852800 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12905532" @default.
• W1979852800 hasPublicationYear "2003" @default.

• next