CONOR and CONOR: LARVAE OF FOUR PORCELLANIDAE 



Maxilliped I biramous. Coxopodite usually 

 with two distal setae. Basipodite usually with 

 nine setae along inner margin grouped 2, 2, 2, 3 

 proximal to distal. Endopodite four-segment- 

 ed: segments 1 and 2 each usually with three 

 distal setae (segment 2 occasionally with four), 

 inner margin and one distal seta, outer margin; 

 segment 3 most commonly with one but occasion- 

 ally two medial, two to four distal setae, inner 

 margin and one medial seta, outer margin; seg- 

 ment 4 with 8 to 11 terminals and 1 proximal 

 seta, outer margin. Exopodite two-segmented 

 with 14 natatory setae on distal segment. 



Maxilliped II biramous. Coxopodite lacking 

 setae. Basipodite usually with three setae 

 grouped 1, 2 proximal to distal. Endopodite 

 four-segmented: segment 1 with two or three 

 distal setae, inner margin and one distal seta, 

 outer margin; segment 2 with one or two distal 

 setae, inner margin and one distal seta, outer 

 margin; segment 3 usually with one (occasional- 

 ly none) medial, two distal setae, inner margin, 

 and one medial seta, outer margin; segment 4 

 with five terminals and one proximal seta, outer 

 margin. Exopodite two-segmented with 14 nata- 

 tory setae on distal segment. 



Maxilliped III a bilobed bud. Exopodite in- 

 creases in size throughout stage; four to six 

 setae present; one or two definite segments 

 present beneath cuticle, depending on age of 

 zoea. Endopodite entire or segmented with up 

 to five segments beneath cuticle, depending on 

 age; setae of megalopa stage visible beneath 

 cuticle of advanced zoea. 



Pereiopod buds enlarge during stage and be- 

 come well developed; first and fifth pairs dis- 

 tinctly chelate. Spines and claws appear on 

 pereiopods in advanced, premolt larva. 



Abdominal somites larger than in zoea I but 

 similar in form; segments 2, 3, 4, and 5 each 

 bear a pair of pleopods of unequal length. 



Telson increased in size; an unpaired median 

 seta added on central prominence (Figures IC 

 and IIJ); anal spine present. 



Basic color pattern same as in zoea I; red 

 chromatophores added to pereiopods and beneath 

 carapace in zoeae of advanced age. Carapace 

 2.37 to 2.54 mm in length. 



MEGALOPA 



(Figures 12 and 13) 



Antennule biramous, consisting of a three- 

 segmented peduncle, a dorsal ramus with six seg- 

 ments, and a ventral ramus with three segments. 

 Segments 2, 3, and 4 of dorsal ramus each bear 

 two tiers of aesthetascs; segment 5 with only 1 

 aesthetasc tier. Numbers of aesthetascs per tier 

 proximal to distal 7-8, 8, 6-7, 5, 4, 2, 3. One long 

 seta associated with distal tier of aesthetascs on 

 segments 2, 3, and 4. Other setation as figured. 



Antennal flagellum composed of 29 to 30 seg- 

 ments in addition to the three-segmented pe- 

 duncle; most segments bear variable numbers 

 of fine bristles around the distal margin as fig- 

 ured. 



Mandible highly sclerotized with three-seg- 

 mented palp; terminal segment of palp with 

 about 17 spines; grinding edge only slightly ir- 

 regular with a generally bladelike form. 



Maxilla I with a two-segmented endopodite 

 bearing a single distal seta on terminal segment. 

 Basal endite with 7 slender setae and 14 heavy 

 spinelike setae along distal margin; also seven 

 short, stout, spinelike setae submarginally on 

 dorsal surface of segment. Coxal endite with 

 four setae on dorsal surface and about 29 mar- 

 ginal and near submarginal setae; delicate fan- 

 like coxal exite rimmed with hairs is present. 



Maxilla II with unsegmented endopodite 

 which bears five or six setae. Basal endite bi- 

 lobed: distal lobe with 33 to 36 setae; proximal 

 lobe with about 22 setae. Coxal endite bilobed: 

 distal lobe with about 20 setae; proximal lobe 

 with about 38 setae. Scaphognathite with about 

 68 marginal plumose setae and 5 short fine hairs 

 on the surface of the fan. 



Maxilliped I with exopodite bearing nine setae. 

 Endopodite indistinctly two-segmented, bearing 

 one seta on distal segment. Protopodite with 

 about 52 setae. Coxal endite with about 23 

 setae. 



Maxilliped II biramous; exopodite indistinctly 

 two-segmented with eight or nine terminal setae; 

 endopodite four-segmented, segments 3 and 4 

 having heavy terminal brushes of about 26 and 

 30 setae respectively ; other setation as figured. 



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