. "S\u00FCdkamp, Wouter H." . . . "244749" . "Machaeracanthus is a genus based on a few diagnostically significant characters which are useful in separating species. The cross-sectional shape of the spines has been the main character used to diagnose the different species, but this shape varies along the length of the spine and has often been inaccurately estimated. Machaeracanthus spines differ from the \u201Enormal\u201C fin spines of acanthodians and chondrichthyans in that the central canal is totally enclosed, rather than opening out along the proximal end of the trailing edge. A re-examination of specimens indicates that Machaeracanthus had \u201Epaired pairs\u201C of pectoral spines and a distinctive perichondrally ossified scapulocoracoid resembling those of ischnacanthiform acanthodians."@en . "472"^^ . "Morphology, Phylogeny and Paleobiogeography of Fossil Fishes" . . "1"^^ . . "4"^^ . "RIV/00023272:_____/10:#0001318" . "Machaeracanthus is a genus based on a few diagnostically significant characters which are useful in separating species. The cross-sectional shape of the spines has been the main character used to diagnose the different species, but this shape varies along the length of the spine and has often been inaccurately estimated. Machaeracanthus spines differ from the \u201Enormal\u201C fin spines of acanthodians and chondrichthyans in that the central canal is totally enclosed, rather than opening out along the proximal end of the trailing edge. A re-examination of specimens indicates that Machaeracanthus had \u201Epaired pairs\u201C of pectoral spines and a distinctive perichondrally ossified scapulocoracoid resembling those of ischnacanthiform acanthodians." . . . "A new look at Machaeracanthus"@en . . . "26"^^ . "A new look at Machaeracanthus" . . "Machaeracanthus; acanthodians; systematic; morphology; Devonian"@en . "Desbiens, Sylvain" . "RIV/00023272:_____/10:#0001318!RIV11-MK0-00023272" . "[3B6DF8E4A180]" . "Ekrt, Boris" . "A new look at Machaeracanthus"@en . "Z(MK00002327201)" . . . "Mnichov, N\u011Bmecko" . "Verlag Dr. Friedrich Pfeil, M\u00FCnchen" . . . . "A new look at Machaeracanthus" . "978-3-89937-122-2" . . . "Burrow, Carole J." .