molar process

(Syn. incisor process) [Butler, T.H.].

A medial process of the mandible. In the plesiomorphic condition, it has a broad, distal, triturating surface with circumgnathal denticles, a posterior row of broad, setulate setae, and sensory pores on the distal surface [Wilson, 1989].

Grinding portion of gnathal lobe of mandible. (Syn. pars molaris) [Moore and McCormick, 1969].

Grinding portion of gnathal lobe of mandible. (Syn. pars molaris) [McLaughlin, 1980].

Inwardly directed process of mandible usually bearing spines or a flat grinding surface [Holdich and Jones, 1983].

(Order Diplostraca):

Terminal end of each mandible; extends into preoral cavity (atrium oris) under upper lip (labrum) [Stachowitsch, 1992].

(Class Cephalocarida):

Grinding process (vs. gripping = incisor process) at end of each mandible. Bears numerous small teeth and extends into atrium oris under labrum [Stachowitsch, 1992].

(Order Cumacea):

Proximal grinding process (vs. gripping = incisor process) of each mandible. (columnar = cylindrical = truncate, styliform). (Syn. pars molaris) [Stachowitsch, 1992].

(Order Tanaidacea):

Proximal grinding process (vs. gripping = incisor process) of each mandible [Stachowitsch, 1992].

(Order Decapoda):

Grinding process (vs. gripping = incisor process) of each mandible. May be fused with incisor process. (Syn. pars molaris) [Stachowitsch, 1992].

(Order Amphipoda):

Proximal grinding process (vs. gripping = incisor process) of each mandible. (laminar, ridged, rounded, setulose, smoothly truncated, absent) [Stachowitsch, 1992].

(Order Isopoda):

Grinding, or piercing or slicing structure, arising mid-basally on body of mandible; pars molaris [Wetzer et al. 1997].

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^{Nomenclature of isopod cephalon (A). Examples of isopod mouth appendages: Idoteidae (B, C, F, H); Cirolanidae (D, E, G, I). [Wetzer et al. 1997]}

(Order Isopoda):

Proximal grinding process (vs. gripping = incisor process) of mandible. (immovable, movably articulated; blade-like, blunt-pointed, broad and truncate, pointed with apical setae, spiniform, truncate with teeth) [Stachowitsch, 1992].

(Order Mysida):

Proximal grinding process (vs. gripping = incisor process) of each mandible [Stachowitsch, 1992].

(Order Stomatopoda):

Well-developed grinding process (vs. gripping = incisor process) of each mandible. Armed with two rows of teeth and extends beneath labrum into mouth. (Syn. pars molaris) [Stachowitsch, 1992].

(Order Leptostraca):

Grinding process (vs. gripping = incisor process) of each mandible [Stachowitsch, 1992].

(Class Remipedia):

Grinding process (vs. cutting = incisor process) at tip of each mandible; located on pedestal and composed of broad, flat basin containing dense rows of spines [Stachowitsch, 1992].

(Superorder Syncarida):

Proximal grinding process (vs. distal gripping = incisor process) of each mandible [Stachowitsch, 1992].

(Order Thermosbaenacea):

Proximal grinding process (vs. gripping = incisor process) of each mandible. Bears series of fine setae (guide setules) [Stachowitsch, 1992].

(Order Euphausiacea):

Grinding process (vs. gripping = incisor process) of each mandible [Stachowitsch, 1992].