tailieunhanh - Dictionary Of Invertebrate Zoology - R

R race n. [F. race; member of the same stock or lineage] A population or aggregate of populations inhabiting a defined geographical and/or ecological region possessing characteristic phenotypic and gene frequencies or features | R race n. F. race member of the same stock or lineage A population or aggregate of populations inhabiting a defined geographical and or ecological region possessing characteristic phenotypic and gene frequencies or features of chromosome structures that distinguish it from other such groups. racemose a. L. racemus bunch Bunch as perhaps of grapes. racemose glands SIPUN Glandular structures on each side of the rectum function unknown buschelformigen Korper. rachidian rhacidian a. Gr. rhachis backbone MOLL The median or central tooth on the radula the rachidian tooth. rachiform a. Gr. rhachis backbone L. forma shape Shaped like a rachis. rachiglossate rhachiglossate a. Gr. rhachis backbone glossa tongue Moll A radula with three longitudinal rows of teeth one median may be simple or have several cusps and two lateral rake-like with many cusps . rachis n. pl. rachides rachises Gr. rhachis backbone 1. Any of various axial structures. 2. NEMATA The central or axial chord in the ovary around which multiple rows of germinal cells are laid down. radial a. L. radial ray 1. Extending from a center toward the periphery like rays. 2. Pertaining to a radius. radial n. L. radial ray ECHINOD 1. In Crinoidea any proximal undivided plate or ray bearing an anal plate. 2. In Asteroidea a prominent ossicle on the surface in line with the mid-line of the arm part of the primary surface. 3. In Echinoidea the ambulacrum. radial apophysis ARTHRO Chelicerata In Arachnida a copu-latory organ on the male palp. radial canal CNID Scyphozoa A canal in the mesoglea of a medusa running from the center to the edge or at least in part. 772 Maggenti and Gardner radial cell ARTHRO Insecta A cell bordered anteriorly by a branch of the radial vein. radial gashes MOLL Bivalvia Radial sharp-edged cuts found on the upper valve of Gryphaeidae. radial growth MOLL Bivalvia Growth direction outward from the beak to the shell edge marked by the costa or other ornamentation. radial lirae see carapace costae .

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