lower lip

See: metastoma [Martin, 2005].

See: metastoma [McLaughlin, 1980].

(Order Cladocera):

Labium [Stachowitsch, 1992].

(Order Cumacea):

Labium [Stachowitsch, 1992].

(Order Decapoda):

Labium [Stachowitsch, 1992].

(Order Amphipoda):

Labium [Stachowitsch, 1992].

(Order Isopoda):

Labium [Stachowitsch, 1992].

(Order Mysida):

Labium [Stachowitsch, 1992].

(Order Stomatopoda):

Labium [Stachowitsch, 1992].

(Order Leptostraca):

Labium [Stachowitsch, 1992].

(Subclass Branchiura):

Refers to either 1) paragnaths of labium surrounding mouth posteriorly or 2) lip-like lower margin (bearing labial spines and associated glands) of proboscis [Stachowitsch, 1992].

(Class Ostracoda):

Labium [Stachowitsch, 1992].

(Order Thermosbaenacea):

Labium [Stachowitsch, 1992].