Nautiliform see nautiloid

nautiloid a. [Gr. nautilos, nautilus shell; eidos, form] (MOLL: Cephalopoda) Any nautilid shell coiled in a symmetrical involute spiral; nautiliform.

navicular a. [L. dim. navis, ship] Boatshaped; cymbiform; scaphoid.

neala n. [L. ne, not; ala, wing] (ARTHRO: Insecta) 1. The jugum or jugal region of a wing. 2. Vannus neallotype n. [Gr. neos, new; allos, other; typos, type] An allotype of the opposite sex from that described in the publication of a neotype.

neanic a. [Gr. neanikos, fresh] 1. Being youthful or immature; a stage of development between the brephic and mature. 2. (ARTHRO: Insecta) The pupal stage. 3. (brachio) A youthful stage when generic characters are beginning to become apparent. 4. (bryo) Zooids laid down in the phase of astogenic change.

neap a. [ME. neep, neap] A series of tides exhibiting a small tidal range; occurring midway between spring tides.

Nearctic a. [Gr. neos, new; arkticos, bear] Pertaining to or belonging to a terrestrial division comprised of Greenland and North America, and including northern Mexico.

neascus larva (PLATY: Trematoda) In Strigeidae and Dip-lostomatidae, a type of metacercaria with a cup-shaped forebody and a well developed hindbody.

nebulous a. [L. nebula, cloud] Clouded; marked with many scattered dilated colors or spots; indistinct.

neck n. [A.S. hnecca, neck] 1. (ARTHRO: Insecta) The slender connecting structure between head and thorax where the head is free. 2. (moll) Distal part of the base of a si-phonostomatous shell, starting where outline of left side changes from convex to concave. 4. (PLATY: Cestoda) The unsegmented area between the scolex and strobilae. 3. (NEMATA) The slender, anterior portion of the body containing the esophagus.

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