中生代鸟类牙齿的退化及其可忽略的体重效应

周亚纯, 舒柯文, 张福成

Negligible effect of tooth reduction on body mass in Mesozoic birds

ZHOU Ya-Chun, Corwin SULLIVAN, ZHANG Fu-Cheng

Table 6 Relative average total tooth mass (R-ATTM) values (‰) calculated for Mesozoic birds using different regression models

Taxa Specimens R-ATTM M-(TH & FARL) M-TH M-FARL M-FABL Archaeopteryx London specimen 0.346 0.777 0.466 0.514 Berlin specimen 0.632 Jeholornis IVPP V 13274 0.011 IVPP V 14978 0.038 Sapeornis IVPP V 13275 0.118 0.103 IVPP V 13276 0.156 0.198 Eoenantiornis IVPP V 10533 0.27 0.236 0.267 0.502 Cathayornis IVPP V 9769 0.195 Pengornis IVPP V 15336 0.107 0.275 0.210 0.316 Longipteryx IVPP V 12325 0.379 0.536 0.863 0.475 Longirostravis IVPP V 11309 0.010 0.047 0.023 0.025 Longusunguis IVPP V 17964 0.261 0.563 0.478 0.618 Bohaiornis IVPP V 17963 0.390 1.171 0.356 0.941 Parabohaiornis IVPP V 18691 0.289 0.994 0.405 0.580 Yanornis IVPP V 12558 0.294 0.555 0.848 0.848 Tianyuornis STM 7-53 0.179 0.528 0.337 0.404