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Colour
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Light grey with highly pigmented dorsal surface
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Creamy white with a pigmented lateral and posterior margin of pereonites
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Similar to that of ovigerous female in late stage
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Transparent with scattered chromatophores
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Clear with scattered chromatophores particularly on uropods and pleotelson
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Similar to that of manca
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Site of infestation
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On the floor of the buccal cavity, the cephalon facing the opening of the host mouth
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On the floor of the buccal cavity, on gill arch just behind the female
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Similar to that of female
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Usually in pairs, attached on the lower mucous membrane of the beak of the host
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Found in the brood, then released in to water at inter-moult stage and lead a short free swimming life, and finally the manca either attaches to the body surface of the specific host or may die
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Seen with in the brood pouch
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Size
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2.6 times as long as wide. Widest at pereonites 5 to 6
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Body 2.67 times as long as wide
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Body 2.7 times as long as wide
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Body approximately 3 times as long as wide
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Body 3.5 times as long as wide
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Body 4 times as long as wide
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Cephalon
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Partially immersed in poorly developed amphicephalic processes of pereonite 1, as long as wide
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Cephalon not immersed in pereonite 1
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Cephalon partially immersed in poorly developed amphicephalic processes of pereonite 1, as long as wide, anterior margin truncate
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Anterior margin of cephalon rounded, not immersed in pereonite 1
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Cephalon wider than long, 1.6 times as wide as long and golden yellow in colour
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Cephalon 1.4 times as wider than long and not immersed in pereonite 1
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Pereon
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With 7 pereonites. Coxae not visible in dorsal view
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With 7 pereonites Coxae not visible in dorsal view
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With 7 pereonites. Coxae not visible in dorsal view
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With 7 pereonites. Coxae not visible in dorsal view
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With 7 pereonites. Coxae not visible in dorsal view
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With 7 pereonites. Coxae not visible in dorsal view
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Pleon
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With 5 pleonites
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With 5 pleonites
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With 5 pleonites
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With 5 pleonites
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With 5 pleonites
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With 5 pleonites
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Pleotelson
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Pleotelson 1.6 times as wide as long, wider than pleonite 5, posterior margin broadly rounded
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Pleotelson 2 times as wide as long, wider than pleonite 5, posterior margin broadly rounded
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Pleotelson 1.8 to 2 times as wide as long
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Pleotelson as long as wide, apical margin rounded with many setae
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Pleotelson 1.2 times as wide as long and the apical margin with 18 to 20 plumose setae
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Apical margin without setae, dark pigmentation
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Eye
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Eyes small, not very developed but moderately distinct
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Eyes small, much prominent than that of female
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Eyes small and moderately distinct
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Eyes prominent, ovate and conspicuous in dorsal view
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Eyes black, prominent, ovate and conspicuous in dorsal view
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Eyes black, prominent, ovate and conspicuous in dorsal view
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Antennule
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Antennule, stouter than antenna, subequal in length to antenna, composed of 8 articles; articles 1 to 3 slightly wider than others
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Antennule, stouter than antenna, subequal in length to antenna, 8 articled; first three articles slightly wider than other
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Similar to that of ovigerous female
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Antennule 8 articled, extending to anterior margin of pereonite 1; articles 5 to 8 with 3 to 5 spinules and article 8 with few terminal aesthetascs
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Antennule, 8 articled, extending to anterior margin of pereonite 2; article 5, 7 and 8 with 2 setae and article 6 with one seta. All the articles with 3 to 4 spinules and article 8 with four terminal aesthetascs
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8 articled antennules smaller than antennae. Without setae and spinnules
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Antenna
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Antenna 9 articled, decreasing gradually in width, distal margin of articles 6, 7 and 8 with 3 to 6 setae; article 9 with 3 terminal aesthetascs
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Antenna 9 articled, decreasing gradually in width, distal margin of articles 6, 7 and 8 with 3 to 6 setae; article 9 with 3 to 6 terminal aesthetascs
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Similar to that of ovigerous female
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Antenna longer than antennule, 9 articled, extending to anterior margin of pereonite 2; articles 6 to 9 with few spinnules, inner margin of article 3 with 4, article 4 with 5 and terminal of article and 9 with 3 setae; distal margin of article 4 and 5 with 1 plumose setae
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Antenna longer than antennules, 11 articled, extending to anterior margin of pereonite 4; all the articles with spinnules and article 11 with 4 terminal aesthetascs. Inner margin of article 3 with 1 plumose seta
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Antenna is larger than antennule and 11 articled. Without setae and spinnules
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Mandible
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Mandible palp 3 segmented, without setae
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Mandible palp 3 segmented, articles 2 and 3 with several setae on distolateral margin
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Similar to that of male
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Mandible palp article 2 with 4 to 6 marginal seta; article 3 with 5 to 8 marginal setae and 1 apical recurved seta
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Mandible palp article 2 with 1 seta arising from the distal margin; article 3 with 3 marginal setae and 1 apical recurved seta
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Not well developed. Palp without setae
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Maxilla
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With 2 spines on median lobe and 1 spine on lateral lobe
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Bi-lobed, with 2 spines on median and lateral lobes
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Similar to that of male
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Similar to male stage
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Similar to male stage
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Not well developed
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Maxillule
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With 4 apical spines, slightly recurved
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With 4 apical spines, slightly recurved
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With 4 apical spines, slightly recurved
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Similar to male stage
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Similar to male
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Not well developed
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Maxilliped
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Maxilliped with oostegial lobes with many plumose setae and a palp with 3 small apical and 2 lateral recurved spines on article 3
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Without oostegial lobes and 5 apical recurved spines on article 3 of palp
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Similar to that of male
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Similar to male stage
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Similar to that of male
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Not well developed
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Pereopods
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Gradually increased in size from 1 to 7, without spines; broad basis increasing in width progressively from p1-p7
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Pereopods 1 to 7 gradually increased in size, without spines; basis increasing in width progressively
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Similar to that of ovigerous female
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Pereopod 1 without spines, pereopods 2 to 5 with 1 to 2 spines on posterior margin of propodus; pereopod 3 and 5 with 1 spine on the posterior margin of merus and the vestigial pereopod 7 with 3 to 4 spines on carpus and 4 to 6 spines on propodus. Pereopods 1 to 3, dactylus with vestigial teeth; dactylus of pereopods 2 and 3, about 2 times longer than propodus, pereopod 7 with short and blunt dactylus
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6 pereopods; pereopod 1, with 1 spine on merus and carpus. Pereopod 2 with 1 spine on posterior margin of merus; pereopod 3 with 1 spine on the posterior margin of merus and propodus. One spine on the posterior margin of propodus of pereopod 4; pereopod 5 and 6 with 1 spine on carpus and 2 to 3 spines on the posterior margin of propodus. Dactyls of pereopods 1 to 3 toothed, 4 to 6 not toothed
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Only 6 pereopods. Pereopod 7 is missing. Without spines
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Penes
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Absent
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Penes visibles on sternite 7
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Rudimentary penes visible on sternite 7
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Poorly developed penes on sternite 7
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Absent
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Absent
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Brood pouch
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Brood pouch made up of 4 pairs of overlapping oostegites arising from the bases of pereopods 2, 3, 4 and 6
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-
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-
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-
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-
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Pleopods
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Pleopods not distinctly visible in dorsal view. Pleopod 2 without appendix masculine. Endopods of pleopods 4 and 5 moderately or strongly folded, respectively
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Pleopods not distinctly visible in dorsal view. Pleopod 2 with appendix masculine. Endopodite of pleopods 4 and 5 moderately or strongly folded
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Pleopod 2 with appendix masculina like that of male
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The lateral margin of exopodite of all pleopods with few setae and the median margin of protopod with 4/5 retinaculae. Pleopod 2 with thick and vestigial appendix masculina, as long as endopodite. Pleopods 1 and 3 subequal. Endopods of pleopods 4 and 5 moderately folded
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Pleopods not distinctly visible in dorsal view. Pleopod 1 with 4 to 6 plumose setae on endopodite and 14 to 18 plumose setae on exopodite. Pleopods 2 to 5, apical margin of exopodite with 14 to 18 plumose setae
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Exopodite without plumose setae. appendix masculine not developed
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Uropods
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Uropod rami short, not reaching the distal margin of pleotelson; rami subequal in length, curved and apically rounded
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Uropod rami short, not reaching the distal margin of pleotelson; rami subequal in length, curved and apically rounded
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Pleotelson 1.8 to 2 times as wide as long and uropods similar to those of ovigerous female
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Pleotelson as long as wide, apical margin rounded with many setae. Uropods extending beyond the distal margin of pleotelson, inner margin of basis with 3 to 4 plumose setae; rami subequal in length but exopodite slightly shortest, curved and apically round; exopodite with 40 to 44, and the endopodite with 60 to 64 setae
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Pleotelson 1.2 times as wide as long and the apical margin with 18 to 20 plumose setae. Uropod basis extending beyond the distal margin of pleotelson; rami subequal extending strongly beyond the distal margin of pleotelson, apically rounded with 8 to 12 plumose setae. Uropods and pleotelson with many dark chromatophores
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Uropods extending beyond the pleotelson, rami subequal; dark pigmentation only on the uropods and pleotelson
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