† microsiphonulan.
Zoology. Obsolete. rare.
A. Hyatt's name for: a stage of development in certain cephalopods, at which a microsiphon or microsiphuncle begins to develop.
ΚΠ
1887 A. Hyatt in Proc. Boston Soc. Nat. Hist. 23 401 This was the beginning of the small siphon and can be appropriately termed the Microsiphonula. The microsiphonula was the typical stage of nearly all the known genera of Nautiloids.
Derivatives
microsiphonular adj. of or relating to a microsiphonula.
ΚΠ
1890 Cent. Dict. Microsiphonular.
microsiphonulate adj. having a microsiphonula.
ΚΠ
1887 A. Hyatt in Proc. Boston Soc. Nat. Hist. 23 402 These organs entirely disappeared in the true microsiphonulate forms.
microsiphonulation n. the development of a microsiphuncle.
ΚΠ
1887 A. Hyatt in Proc. Boston Soc. Nat. Hist. 23 402 Sannionites was a genus in which the siphon was smaller than in Endoceras, and probably..inherited the tendency to microsiphonulation at the first septum at an earlier age than in Endoceras.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online June 2018).
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