10 GLOSSARY 



LAMINA DENTATA. Serrate platelike structure in the mandible of anthurideans, 



formed by the fusion of spines of the spine-row. 

 LANCEOLATE. Lance shaped; narrow and tapering to a point. 

 LINGUIFORM. Tongue shaped. 

 MANGA. Young of some peracaridean crustaceans (including isopods), lacking 



last thoracic appendage at time of release from broodpouch. 

 MANDIBLE. First pair of mouthparts, functioning as jaws, often sclerotized. 

 MARSUPIUM. Structure in which eggs are retained by female; the broodpouch. 

 MAXILLA (1 and 2). Two sets of paired mouthpart appendages immediately 



posterior to mandible. 

 MAXILLIPED. First paired appendage of the thorax; usually incorporated into the 



mouthparts. 

 MEDIAN. At, near, or directed toward the middle or midline. 

 MERUS. Article 4 of pereopod. 



METAMORPHOSED. Transformed; changed in appearance, structure, or function. 

 MESIAL. Near or toward the middle or midline. 



MOLAR. Grinding, and sometimes piercing, structure of the mandible. 

 MULTIARTICULATE. Composed of many articles. 

 NATATORY. Adapted for swimming. 



OBSOLETE. Becoming vestigial, and losing original function. 

 OMMATIDIA. Individual visual components of the compound eye. 

 OOSTEGITE. Medially directed lamellar structure arising from coxa of pereopod 



in the female, forming part of the broodpouch or marsupium. 

 OPERCULIFORM. In the form of a cover or lid. 

 OVATE. Egg shaped or oval. 

 PALM. Cutting edge of the propodus, often defined proximally by a spine, in a 



subchelate appendage. 

 PALP. Articulated ramus consisting of one to three articles in mandible, of up to 



five articles in the maxilliped. 

 PEGTINATE. Having teeth like a comb. 



PEDUNCLE. Stalk or proximal part of an appendage, as in antennae. 

 PENIAL RAMI. Paired submedian process on sternite 7 of male. 

 PEREON. Middle or thoracic region of the body, consisting of seven segments or 



pereonites, first fused with cephalon in isopods. 

 PEREONITE. Segment of the pereon. 

 PEREOPOD. Paired appendage of the pereon, consisting of seven articles when 



unmodified. 

 PILOSE. Covered with short hairs or setae. 

 PLEON. Posterior or abdominal region of the body, primitively consisting of six 



segments or pleonites, and bearing paired pleopod and uropod appendages. 

 PLEONITE. Segment of the pleon. 

 PLEOPOD. Paired appendage of the pleon, five pairs being present in the 



primitive condition. 

 PLEOTELSON. Structure resulting from the fusion of the telson and one or more 



pleonal segments. 

 PLICATE. Pleated or folded. 



PRANIZA. Juvenile, immature stage of gnathiideans. 

 PREHENSILE. Adapted for holding or clinging. 



