Definitions

Usage tips Browse list of all terms Display complete list

Labium

See: Metastoma [Martin, 2005]
Flat, non-segmented, bilobed structure situated posterior to the oral opening.
(syn. paragnath, lower lip) [Holdich and Jones, 1983]
Paired, laminar mouth parts immediately posterior to the mandibles. [Mauchline, 1984]
See metastoma. [McLaughlin, 1980]
(Taxon-specific: Order Cladocera) Unpaired, median lip-like structure posterior to mouth. (with/without median keel).
(syn. lower lip, paragnath) [Stachowitsch, 1992]
(Taxon-specific: Order Cumacea) Lobe-like structure posterior to mouth. Divided into two lobes. (See also labrum).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Order Tanaidacea) Lobe-like structure posterior to mouth. Divided into two main lobes (para-gnaths) which may bear hairs, spines, or comb-like rows of short setae, (with/without palp).
(syn. lower lip, hypopharynx) [Stachowitsch, 1992]
(Taxon-specific: Order Decapoda) Lip-like structure posterior to mouth on underside of head; symmetrically bilobed, each lobe being termed paragnath. (paragnath: oval, distally attenuated, sinuous).
(syn. metastome, hypostoma, hypostome, hypopharynx, paragnath) [Stachowitsch, 1992]
(Taxon-specific: Order Amphipoda) Lobe-like structure posterior to mouth. Typically divided into two lobes (paragnaths), each of which may be further subdivided into a large section (outer lobe), a median inner lobe, and a posterolateral extension (mandibular lobe).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) Lobe-like structure posterior to mouth. Typically divided into two lobes (paragnaths).
(syn. lower lip, hpopharynx, posterior lip) [Stachowitsch, 1992]
Schematic representation of an isopod illustrating morphological terms. [Kensley and Schotte, 1989]
(Taxon-specific: Order Isopoda) Lower lip; usually consisting of a pair of lobes posterior to the mouth. [Kensley and Schotte, 1989]
(Taxon-specific: Order Isopoda) The posterior border of the buccal field; the "lower lip" (see paragnath). [Wetzer et al. 1997]
(Taxon-specific: Order Mysida) Lobe-like structure posterior to mouth. Divided into two well-developed lobes (paragnaths).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Order Stomatopoda) Lip-like structure posterior to mouth and mandibles on underside of head (cephalon); bulbous and bilobed, each fringed lobe being termed paragnath.
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Order Leptostraca) Lobe-like structure posterior to mouth; divided into two lobes (paragnaths).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Subclass Branchiura) Lower lip, paragnath. [Stachowitsch, 1992]
(Taxon-specific: Subclass Copepoda) Lip-like structure posterior to mouth on underside of head; bilobed, each lobe being termed paragnath. May be drawn out, along with upper lip (labrum), into cone-like structure (mouth cone).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Subclass Copepoda) The lower lip; a median lobe derived from the fusion of the paragnaths, forming the posterior wall of the oral cone in siphonostomatoids. [Boxshall and Halsey, 2004]
(Taxon-specific: Class Ostracoda) Lip-like structure posterior to mouth on underside of head. May be bilobed, each lobe being termed paragnath.
(syn. lower lip, hypostome) [Stachowitsch, 1992]
(Taxon-specific: Superorder Syncarida) Paragnath. [Stachowitsch, 1992]
(Taxon-specific: Order Thermosbaenacea) Lobe-like structure posterior to mouth; relatively elongate, with terminal spines or setae. (See also labium).
(syn. lower lip) [Stachowitsch, 1992]
(Taxon-specific: Order Euphausiacea) Lobe-like structure posterior to mouth; divided into two lobes (paragnaths).
(syn. lower lip) [Stachowitsch, 1992]