Definitions

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Spine

Carapace, spines, based on Munida. [Baba, 2005]
(Figure only.) [Baba, 2005]
Anterior part of carapace, including ocular peduncles, based on Munidopsis. [Baba, 2005]
(Figure only.) [Baba, 2005]
A cuticular outgrowth without a recognizable basal articulation. [Ingle, 1992]
A non-articulated cuticular extension that has a base that is generally not as wide as the structure is long; regardless of its size or shape, a spine has no socket. [Watling, 1989]
A pointed outpocketing of the cuticle that is confluent with the cuticle at its base (not articulated). [Wilson, 1989]
Sharp, stiff, fairly robust protuberance on body or appendages. [Butler, T. H.]
(Taxon-specific: ) Anal spine, carapace spine. [Stachowitsch, 1992]
One of numerous small, spine-like projections of body rings, telson, or supra-anal plate. [Stachowitsch, 1992]
(Taxon-specific: Family Pycnogonidae) Abdominal spine. [Stachowitsch, 1992]
One of numerous sharp, spine-like projections on carapace. Typically refers to anterior projections in shrimp-like (natantian) decapod. According to position and group one may distinguish, e.g., antennal, branchiostegal, hepatic, postorbital, postrostral, pterygostomial, suborbital, and supraorbital spines. [Stachowitsch, 1992]
One of several thorn-like projections on carapace, body, or appendages. According to position, those on carapace may be termed antennal, branchiostegal, posterolateral, and posterodorsal spines (the latter unpaired). [Stachowitsch, 1992]
(Taxon-specific: Family Cyatholaimidae) Stout, often thickened and rigid, armature element on paired appendages or caudal rami, with internal tissue connection through integument. [Boxshall and Halsey, 2004]
Type of valve sculpture: elongate, larger, typically pointed projection. (clavellate, conjunctive, disjunctive, mamillate, marginal, perforate). [Stachowitsch, 1992]
One of various spine-like projections of body. According to position one may distinguish median preanal spine on ventral surface of last abdominal somite (pleomere), dorsal or middorsal spine on dorsal midline of one or more pleomeres, as well as interior or posterior spine associated with lateral margin of carapace.
See: Subapical spine [Stachowitsch, 1992]