Appendix III 

 Glossary 



accessory flagellum. The secondary ramus of antenna 1, often absent or vestigial 

 (fig. 1), and attached medially to peduncular article 3. 



aesthetase, aesthete. Sensory setae of antennae, flattened and nontapering. 



article. The segment of an appendage (fig. 1) . 



calceolus. A small globular or helmet-shaped, articulate sense organ on the 

 antennae; presumably a modified aesthetase; of rare occurrence in Gammaridea 

 and most often seen in Eusiridae (fig. 89j) . 



carpochelate. Immovable finger of prehensile appendage occurring on carpus 

 (article 5); examples: Leucothoe, Microdeutopus . 



chela. Immovable finger of prehensile appendage. 



chelate. Descriptive of the palm of a gnathopod protruding as an immovable 

 finger on which the dactyl closes (fig. 129/i). See parachelate, carpochelate, 

 propodochelate, merochelate, complexly chelate. 



claw, claw-like. Descriptive of a talon or simple, tapering nail. [Not descriptive 

 of chelae as used in decapod terminology.] 



compressed. Flattened from side to side. 



conjoint. Describing the basal amalgamation of flagellar articles on antennae. 



corneal lens. A biconvex cuticular body occurring directly in or on the chitinous 

 cephalic surface in Ampeliscidae; contrasted with subcuticular ommatidia. 



coxa, coxal plate. [Terms used synonymously herein.] Article 1 of a pereonal 

 appendage, expanded into a lateral lamella (fig. 1). [Terms for other articles of 

 the appendages such as basis, ischium, merus carpus, propodus, and dactyl 

 are frequently but not universally used in Gammaridea; instead, the articles 

 are simply numbered.] 



dactyl. Talon-like terminal article of pereopods (article 7) or maxillipeds (articles 

 3 or 4) . 



depressed. Flattened dorsoventrally. 



emarginate. Descriptive of the concave posterior end of an uncleft telson (fig. 

 42e). 



entire. Descriptive of an uncleft telson (fig. 38/). 



epimeron. A lateral pleuron of pleonites 1-3 ; the ventrolateral plate-like extension 

 of the body segment (fig. 1) . 



epistome. The anterior surface of the head above the labrum; this area is often 

 extended ventrally to appear as a part of the labrum and may be anteriorly 

 produced as a cusp or lobe (fig. 4a). 



flagellum. The distal portion of either antenna 1 or 2; on antenna 1 it commences 

 with article 4, on antenna 2 with article 6; because basal peduncular articles 

 of antenna 2 are often difficult to resolve, the juncture may be recognized 

 between the elongated final peduncular article and the shortened first flagellar 

 article which is followed by similar short articles; on antenna 1, however, article 

 1 of the flagellum is occasionally elongate and apparently composed of non- 

 segregated (thus conjoint) daughter articles (fig. 1). 

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