| 单词 | adjustor muscle |
| 释义 | > as lemmasadjustor muscle 3. Zoology and Palaeontology. In a living or fossil brachiopod: any of several muscles which adjust the position of the valves of the shell (with respect to each other or to the pedicle). Also adjustor muscle. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Brachiopoda > [noun] > member of > parts of periosteum1758 periostracum1833 pallium1834 mantle cavity1853 adjustor1857 jugum1888 protegulum1891 1857 Proc. Royal Soc. 8 464 These the author [sc. A. Hancock] terms the dorsal and ventral adjustors. 1859 A. Hancock in Philos. Trans. 1858 (Royal Soc.) 148 803 The three pairs of adjustors are apparently for the purpose of keeping the valves opposed to each other,—of holding them adjusted. 1895 Cambr. Nat. Hist. III. 477 There are three pairs of adjustor muscles..called respectively the central.., external.., and posterior..adjustors, whose action adjusts the shells when all contract together, and brings about a certain sliding movement of the shells on one another when they act independently. 1930 Jrnl. Paleontol. 4 371 This duplex character of the anterior adductors appears in many orthoid shells, especially in Schizophoria and Orthotichia. 1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) vii. 157/2 These two sets of muscles, and the adjustors also, leave well defined muscle scars inside the valves. 2004 Jrnl. Paleontol. 78 285 (caption) Note abundant muscle attachment pits, herein interpreted as muscle bases for pedicle adjustor muscles. < as lemmas |
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