frondose a. [L. frondis, of leaves] More or less divided into leaf-like expansions, as certain mollusks or bryozoans.
frons n.; pl. frontes [L. frons, fore part of anything, face] 1. (ARTHRO: Insecta) The head sclerite bounded by the postfrontal suture dorsally and the epistomal suture ventrally; the frons is delimited in various ways by different authors and in different insects and stages. see front, facies. 2. (SIPUN) see cerebral organs, digitate processes.
front n. [L. frons, fore part of anything, face] 1. The forehead; face. 2. (ARTHRO: Crustacea) In Decapoda, that part of a brachyuran carapace between the orbits. 3. (ARTHRO: Insecta) a. That portion of a cranium between the antennae, eyes, and ocelli; the frons. b. In ants, the facial area above the clypeus between the frontal carinae; dorsally it passes without definite boundary into the vertex.
frontal a. [L. frons, fore part of anything, face] 1. Of or pertaining to the front or forehead. 2. (BRYO) Pertaining to the exposed or orifice-bearing sides of the zooecial chambers.
frontal appendages (ARTHRO: Crustacea) In Anostraca, paired filaments arising from the bases of the antennae, but independent of them.
frontal area (ARTHRO: Insecta) The small median triangular plate of ants, on the anterior surface of the head, just above the clypeus.
frontal band (ARTHRO: Crustacea) A glandular adhesion organ of parasitic copepods, in the frontal region, used for attachment to the host.
frontal bristles (ARTHRO: Insecta) In Diptera, a row of bristles on each side of the boundry between the median, frontal vitta or plate and the eye orbit.
frontal budding (BRYO: Gymnolaemata) Buds arising from the frontal wall or associated structure.
frontal carina (ARTHRO: Insecta) A carina, or ridge, forming the medial boundary of the antennal fossa.
frontal closure (BRYO: Gymnolaemata) In Cheilostomata, calcified frontal and oral walls which were membranous in the autozooid originally.
frontal condyle (ARTHRO: Insecta) A process of the frons that articulates with the dorsal fossa of the mandible.
frontal costa (ARTHRO: Insecta) In Orthoptera, a prominent vertical ridge of the head; a carina.
frontal crest (ARTHRO: Insecta) In Hymenoptera, an elevation extending across the head above the antennal sockets.
frontal dilators of the pharynx (ARTHRO: Insecta) The muscles which run from the frons to the pharynx.
frontal disc (ARTHRO: Insecta) In larval Diptera, a projecting histoblast upon which develops the rudiment of an antenna.
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