caudal ramus
One of paired appendages constituting caudal furca, usually rodlike or bladelike, sometimes filamentous and multiarticular. (Syn. caudal filament, caudal style, cercus, cercopod, furcal ramus, stylet) [McLaughlin, 1980].
Single appendage of terminal abdominal somite paired with another to form caudal furca, both articulated with telson; usually rod-like or blade-like but may be filamentous and multiarticular (caudal filament). (Syn. cercus, cercopod, caudal style, stylet) [Moore and McCormick, 1969].
(Order Cladocera):
One of two relatively short, claw-shaped projections at end of postabomen. May bear up to three series (pectens) of minute spines. Both caudal rami together are termed caudal furca. (denticulate, pectinate, with/without basal spine, with/without pectin). (Syn. claw, postabdominal claw, terminal claw) [Stachowitsch, 1992].
(Order Notostraca):
One of two posteriorly directed projections of last segment (telson). Long and segmented (= annulate, multiarticulate). Both caudal rami together are termed caudal furca. (unarmed, armed with minute spinules and setae). (Syn. furca ramus) [Stachowitsch, 1992].
(Order Diplostraca):
One of two relatively short, posteriorly directed of projections of telson. Both caudal rami together are termed caudal furca. (claw-like, styliform) (see also uropod). (Syn. cercopod, furcal claw) [Stachowitsch, 1992].
(Order Anostraca):
One of two posteriorly directed projections of last segment (telson). Unsegmented, typically fringed with setae. (freely movable/variously fused with last segment; thin and slender, broadly leaf-like or plate-like). (Syn. furcal ramus, cercopod) [Stachowitsch, 1992].
(Class Cephalocarida):
One of two posteriorly projections of last body segment (telson). Consists of single element with terminal setae (ramal setae, caudal setae). Both rami together are termed caudal furca. If telson is interpreted as representing anal somite, then caudal ramus may be termed uropod. (length relative to telson width: equal to or less than, less than twice, equal to twice) [Stachowitsch, 1992].
(Order Leptostraca):
One of two posteriorly directed projections of last body segment (telson). Both rami together termed caudal furca. (dorsoventrally flattened and leaf-like, rod-like) (see also uropod). (Syn. furcal ramus) [Stachowitsch, 1992].
(Subclass Branchiura):
Pair of minute projections between posterior lobes of abdomen; rami flank anus. (basal, lateral, subbasal, subterminal, terminal). (Syn. anal furca, anal papilla) [Stachowitsch, 1992].
(Subclass Cirripedia):
In ascothoracican, one of two posteriorly directed projections of last segment of abdomen. Both caudal rami together termed caudal furca [Stachowitsch, 1992].
(Subclass Copepoda):
One of two posteriorly directed projections of last abdominal segment (anal somite); typically bears a number of setae (caudal setae). (length greater than, equal to, or less than width; margins: hairy, smooth, spinulose). (Syn. furcal ramus) [Stachowitsch, 1992].
(Subclass Copepoda):
The appendage of the posterior abdominal somite of a copepod. It does not have a propodal/ramal configuration and its homologies to serially repeated limbs of the cephalon and thorax have not been determined. The caudal ramus bears setae in a pattern similar to an exopod. Its axial orientation is not known [Ferrari and Dahms, in press].
(Subclass Copepoda):
The paired, setiferous and usually articulated structures carried on the anal somite [Boxshall and Halsey, 2004].
(Subclass Mystacocarida):
One of two relatively large, posteriorly directed projections of last segment (telson). Claw-shaped, with serrate inner margin and bearing several major setae. Both rami together are termed caudal furca. (Syn. furcal ramus, furcal claw) [Stachowitsch, 1992].
(Class Ostracoda):
One of two projections of posterior end (thorax/abdomen) of body; extends anteroventrally due to curvature of body. (paired, unpaired; symmetrical, asymmetrical; lemelliform, rod-shaped, claw-like). (Syn. furcal ramus) [Stachowitsch, 1992].
(Class Remipedia):
One of two unbranched processes projecting posteriorly from anal segment; each ramus bears setae along median margin and terminally. (shorter than, longer than anal segment) [Stachowitsch, 1992].
(Superorder Syncarida):
In bathynellacean, one of two small protuberances at end of telson. Both caudal rami together termed caudal furca. May also be interpreted as representing lobes of telson. (Syn. furcal ramus) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • Caudal ramus — The caudal ramus (caudal rami) is a characteristic feature of primitive Crustaceans. Located on the anal somite (telson segment), the caudal ramus s a pair of appendage like or spine like protrusions. Specific structures which are rod or blade… …   Wikipedia

  • caudal ramus — pl. rami (ARTHROPODA: Crustacea) One of paired appendages, usually rodlike or bladelike, sometimes filamentous and multiarticular just anterior to the anal segment or telson; caudal filaments; caudal style; cercus; cercopod; furcal ramus; stylet …   Dictionary of invertebrate zoology

  • caudal furca — Pair of caudal rami [Moore and McCormick, 1969]. Paired caudal rami of terminal abdominal segment or telson. (Syn. furca) [McLaughlin, 1980]. (Order Cladocera): Caudal ramus [Stachowitsch, 1992]. (Order Notostraca): Caudal ramus [Stachowitsch,… …   Crustacea glossary

  • ramus — A branch of an appendage, e.g. the exopod or endopod. (Pl. rami) [Perez Farfante and Kensley, 1997]. A branch of an appendage. (Pl. rami) [Wilson, 1989]. Branch of appendage or other structure (e.g., flagellum) [McLaughlin, 1980]. Branch of limb… …   Crustacea glossary

  • caudal style — See: caudal ramus [Martin, 2005]. See: caudal ramus [McLaughlin, 1980] …   Crustacea glossary

  • caudal filaments — (ARTHROPODA) 1. Thread like processes at the posterior end of the abdomen; see cercus. 2. For Crustacea see caudal ramus …   Dictionary of invertebrate zoology

  • caudal style — see caudal ramus …   Dictionary of invertebrate zoology

  • caudal filament — See: caudal ramus [Martin, 2005] …   Crustacea glossary

  • furcal ramus — Branch of caudal furca [Moore and McCormick, 1969]. See: caudal ramus [McLaughlin, 1980]. (Order Anostraca): Caudal ramus [Stachowitsch, 1992] …   Crustacea glossary

  • furcal ramus — see caudal ramus …   Dictionary of invertebrate zoology

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