| 释义 |
macrochoanite Palæont.|ˌmækrəʊˈkəʊənaɪt|
[f. macro- + Gr. χοάν-η funnel + -ite1 2 a.]
A nautiloid cephalopod once included in a suborder Macrochoanites, in which each septal neck reaches back into the preceding one. Hence ˌmacrochoaˈnitic a., (having septal necks) characteristic of a macrochoanite.
1883A. Hyatt in Proc. Boston Soc. Nat. Hist. XXII. 260 We, therefore, divide the Ellipochoanoida into the true Microchoanites,..and the Macrochoanites. Ibid., In the more complicated forms of Goniatitinæ, while the young are quite generally macrochoanitic, the later larval stages and the adults are universally short funnelled. 1964C. Teichert in R. C. Moore Treat. Invertebr. Paleont. K 39/1 Macrochoanitic necks are found only in the Endocerida. Ibid. 95/1 Hyatt distinguished the Bactritidae as ‘Macrochoanites’. |