Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 61rarely terrestrial.annidation n. [Gr. an, without; L. nidus, nest] Describing amutant organism existing in a deme because of an ecologicalniche the normal organism is unable to utilize.annotinate n. [L. annus, year] (MOLL: Bivalvia) Depressedlines placed at varying distances across some shells,marking their yearly growth; annual ring; growth ring.annual a. [L. annus, year] Occurring once a year, or lasting forone year.annual colony A deme that lasts only one season and diesout.annual ring see annotinateannular a. [L. annulus, ring] 1. Pertains to being ring-shaped;marked with rings or bands. 2. (ANN: Oligochaeta) Referringto the clitellum of earthworms encircling the body andcontinuing ventrally. see saddle.annular lamina (ARTHRO: Insecta) In Hymenoptera, the laminaor sternal plate situated in front of the genitalia of Formicidae.annular spiracle (ARTHRO: Insecta) 1. In immature Lepidopteraand Hymenoptera, simple, ring-like spiracles with asingle opening with no accessory chambers. 2. In otherimmature insects, may be biforous, having two small orlarge accessory or secondary chambers usually adjacent tothe margin; uniforous, when opening occurs on the margin,or multiforous if three or more openings are present.annulate a. [L. annulus, ring] Composed of, or furnished withring-like bands or annuli; may refer to structural bands orcolored bands.annulates n.pl. [L. annulus, ring] A group of segmented invertebratesincluding the arthropods, annelids and relatedforms.annulations n.pl. [L. annulatus, ringed] Deep, transverse cuticularstriae occurring at intervals (usually regular) givingthe body a segmented appearance.annulet n. [L. annulus, ring] A small ring into which a segmentis divided by complete transverse constrictions, crenula-