- umbonal region
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(MOLLUSCA: Bivalvia)The region of the umbo.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
umbonal region
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umbonal — /um beuh nl/, adj. 1. having the shape or appearance of an umbo; bosslike: an umbonal structure. 2. of, pertaining to, or near the umbo: the umbonal region. Also, umbonic /um bon ik/. [1850 55; < L umbon (s. of umbo; see UMBO) + AL1] * * * … Universalium
umbonal cavity — (MOLLUSCA: Bivalvia) 1. Part of the valve interior which lies within the umbo and under the hinge plate. 2. In oysters, that part of the left valve interior lying in the umbonal region beneath the ligamental area … Dictionary of invertebrate zoology
deck — n. [D. dek, cover] (MOLLUSCA) A septum or small sheet of shelly substance in the umbonal region connecting the anterior and posterior ends of a valve … Dictionary of invertebrate zoology
xenomorphism — n. [Gr. xenos, stranger; morphe, form] (MOLLUSCA: Bivalvia) Sculpture in the umbonal region of the unattached valve that resembles the substratum on which the attached valve was fixed. xenomorphic adj … Dictionary of invertebrate zoology
ligament — (Order Diplostraca): connective tissue spanning from top of head to umbonal region of carapace. Joins body to carapace (along with adductor muscles). (Syn. attachment ligament) [Stachowitsch, 1992] … Crustacea glossary
umbo — n.; pl. umbones, umbos [L. umbo, knob or boss] 1. (ARTHROPODA: Crustacea) a. In Cirripedia, a portion of the plate from which successive growth increments extend. b. In bivalves, apical portion of either valve; see beak. 2. (ARTHROPODA: Insecta)… … Dictionary of invertebrate zoology
sub — sub·abdominal; sub·account; sub·acetate; sub·acid; sub·acidity; sub·acute; sub·adult; sub·aerial; sub·aesthetic; sub·age; sub·agency; sub·agent; sub·akhmimic; sub·alary; sub·alate; sub·alimentation; sub·alkaline; sub·allocate; sub·almoner;… … English syllables
