thoracopod

(Syn. thoracopodite) [Martin, 2005].

An appendage of the thorax [Brusca and Brusca, 2002].

Appendage of any thoracic somite; see thoracic appendage, phyllopod, maxilliped, pereopod. (Syn. cormopod) [McLaughlin, 1980].

Limb attached to any thoracic somite. (Syn. thoracic limb. (Maxillipeds and pereiopods are thoracopods.) [Moore and McCormick, 1969].

(Order Cladocera):

Trunk appendage [Stachowitsch, 1992].

(Order Notostraca):

One of two appendages of each thoracic segment (body ring). Consists of proximal protopod (with endites and epipod), endopod (= sixth endite), and exopod (flabellum). (See also leg). (Syn. thoracic appendage) [Stachowitsch, 1992].

(Order Diplostraca):

Trunk appendage [Stachowitsch, 1992].

(Order Anostraca):

One of two appendages of each thoracic somite (thoracomere). Consists of proximal protopod (with endites, preepipod, and epipod), inner branch (endopod), and outer branch (exopod). Basically biramous, although occasionally referred to as multi- or polyramous due to large number of lobes; also termed phyllopod due to broad, flattened shape [Stachowitsch, 1992].

(Class Cephalocarida):

One of two appendages of each thoracic somite (thoracomere). Consists of protopod with four to six endites and pseudepipod, five- to six-segmented endopod, and two-segmented exopod. More posterior thoracopods may be somewhat modified, those of last (eighth) thoracomere may be reduced or absent. Basically biramous, although occasionally referred to as tri-, multi-, or polyramous due to large pseudepipod and numerous endites [Stachowitsch, 1992].

(Order Cumacea):

One of basically eight pairs of appendages of thorax. First three pair of thoracopods (those of thoracic somites fused to head) are developed as maxillipeds, with the remaining five pairs being termed pereopods [Stachowitsch, 1992].

(Order Tanaidacea):

One of eight pairs of appendages of thorax. Firsi pair developed as maxillipeds, second pair as chelipeds (with either second through eighth or third through eighth pairs thus being termed pereopods). Basically consists of seven segments (coxa, basis, ischiurn, merus, carpus, propodus, dactylus) [Stachowitsch, 1992].

(Order Decapoda):

One of two appendages of each thoracic somite (thoracomere). First three pairs are modified as mouthparts (maxillipeds), the remaining five pairs serve in locomotion (pereopods). (Syn. thoracopodite) [Stachowitsch, 1992].

(Order Amphipoda):

One of two appendages of each somite (thoracomere) of thorax. First pair developed as maxillipeds; second through eighth pairs may be termed pereopods, second and third differentiated as gnathopods. (chelate, subchelate; ambulatory, raptorial) [Stachowitsch, 1992].

(Order Isopoda):

One of two appendages of each somite (thoracomere) of thorax. First pair developed as max-illipeds; second through eighth pairs may be termed pereopods, second and third differentiated as gnathopods. See: pylopod [Stachowitsch, 1992].

(Order Mysida):

One of two appendages of each somite (thoracomere) of thorax. First and second pairs typically developed as maxillipeds. Basically biramous, consisting of twosegmented base (coxa, basis) bearing inner branch (endopod) and flagellum-shaped outer branch (exopod). Those thoracopods not developed as maxillipeds occasionally termed pereopods. (with subchela = subchelate, with terminal claw; with/without exopod) [Stachowitsch, 1992].

(Order Stomatopoda):

One of two appendages of each thoracic somite (thoracomere). First five pairs are uniramous (one through four subchelate, the second with raptorial claw), the last three (stenopods) biramous and used for walking. The former are composed of seven segments: precoxa, coxa, basis, merus, carpus, propodus, dactyl (also interpreted as coxa, basis, ischium, merus, propodus, dactyl). The latter are composed of three-segmented protopod with onesegmented outer ramus (considered to be endopod) and two-segmented inner branch (considered to be exopod). (Syn. thoracic appendage) [Stachowitsch, 1992].

(Order Leptostraca):

One of eight pairs of appendages of thorax, one pair per thoracic somite (thoracomere). Biramous, typically flattened and consisting of proximal section (protopod) with inner branch (endopod) and outer branch (exopod). (foliaceous, phyllopodous; with/without epipods; projecting/ not projecting beyond ventral margin of carapace). (Syn. thoracic appendage) [Stachowitsch, 1992].

(Subclass Branchiura):

One of two appendages of each thoracic segment (thoracomere). Biramous, consisting of three-segmented protopod bearing endopod and exopod. (See also flabellum, natatory lobe, peg) [Stachowitsch, 1992].

(Subclass Cirripedia):

One of up to six pairs of appendages of thorax. Typically refers to appendages of ascothoracican, those of other cirripeds being termed cirri. (uniramous, biramous) (see also maxilliped) [Stachowitsch, 1992].

(Subclass Mystacocarida):

According to intperpretation dividing body into cephalon, thorax, and abdomen, one of two appendages of each thoracic somite (thoracomere). Thus, first thoracopod represents maxilliped and the following four thoracopods are reduced to a single flap-like structure with two large terminal setae [Stachowitsch, 1992].

(Class Ostracoda):

One of two appendages of each thoracic somite (thoracomere). First (occasionally second) pair modified as mouthparts (maxillipeds), the remaininf typically serving in locomotion (pereopods). Maxillipeds uniramous, the remaining biramous and consisting of basal protopod with distal inner branch (endopod) and outer branch (exopod). (See also leg). (Syn. thoracic appendage) [Stachowitsch, 1992].

(Class Ostracoda):

Sixth and seventh paired appendages of body; represents one of two pairs of limbs originating from (not clearly delimited) thoracic region. Basically consists of protopod, endopod, and exopod, although the latter may be modified as branchial plate or be reduced. (biramous, uniramous; lamelliform, multiarticulate, pediform, vermiform; locomotory, nonlocomotory) (see also brush-shaped organ). (Syn. thoracic appendage, trunk appendage) [Stachowitsch, 1992].

(Superorder Syncarida):

One of two appendages of each somite (thoracomere) of thorax. In anaspidacean and stygocaridacean, first pair is developed as maxillipeds. Basically biramous, consisting of two-segmented (coxa, basis) protopod bearing inner branch (endopod) and outer branch (exopod). (biramous, uniramous = with/without exopod; with/without epipods) [Stachowitsch, 1992].

(Order Thermosbaenacea):

One of basically eight pairs of appendages of thorax. First pair developed as maxillipeds. Typically biramous, consisting of protopod bearing larger endopod and smaller exopod. (excluding maxillipeds: five pairs, seven pairs; equal/not equal in length; uniramous, biramous) (see also pereopod) [Stachowitsch, 1992].

(Order Euphausiacea):

One of two appendages of each thoracic somite (thoracomere). Basically biramous, consisting of proximal part (protopod) bearing gill (epipod) as well as distal five-segmented endopod and two-segmented exopod. Posterior pair(s) may be reduced except for gill. (chelate, prehensile, rudimentary, vestigial). (Syn. pereopod) [Stachowitsch, 1992].