Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

778Maggenti and Gardnercells arising by genetic recombination.recombinant DNA DNA produced by recombination, particularlyDNA produced from 2 different species by techniquesof genetic engineering.recondite a. [L. reconditus, put away, hidden] Concealed; remotefrom ordinary or easy perception; hidden.recrudescence n. [L. recrudescere, to become raw again] Anew outbreak after a period of abatement or inactivity. recrudescenta.recruitment trail (ARTHRO: Insecta) In social Hymenoptera,an odor trail laid by a single scout worker to recruit nestmatesto an area where many workers are needed.rectal a. [L. rectus, straight] Of or pertaining to the rectum.rectal caecum (SIPUN) A small blind tube present on the posterioror rectal section of the gut; function unknown.rectal gills (ARTHRO: Insecta) In anisopteran Odonata nymphs,an elaborate system of folds in the wall of the rectum, thelatter chamber forming the branchial basket.rectal glands A term loosely applied to numerous glands adjacentto or associated with the anus; glands which often secreteeither a lubricant, silk-gum, or other specialized materialsuch as a gelatinous matrix for the protection ofeggs.rectal matrix glands see matrix glandsrectal muscles (NEMATA) Specialized muscles that function toopen and close the anal opening.rectal pad (ARTHRO: Insecta) Columnar epithelium (usually 6)extending longitudinally along the rectum, important in thereabsorption of water, salts and amino acids from theurine.rectal papillae (ARTHRO: Insecta) In some Diptera, a papilliformmodification of the rectal pads projecting into therectum enclosing intercellular sinuses separated from thegut lumen by cell junctions and connected indirectly withthe hemocoel.rectal pouch 1. (ARTHRO: Insecta) a. In some Coleoptera, anenlarged anterior part of the rectum opening into the hind-