ANDRYSZAK and GORE: COMPLETE LARVAL DEVELOPMENT OF MICROPANOPE SCULPTIPES 



Basal endite with 7 denticulate spines, 5 or 6 

 sparsely plumose setae; few minute hairs. En- 

 dopodite and protopodites as in third zoea. 



Maxilla (Figure 5G). Coxal endite bilobed with 6 

 proximal, 4 distal plumose setae. Basal endite 

 bilobed with 6 proximal, 7 distal plumose setae, 

 several minute lateral hairs on distal lobe. 

 Scaphognathite with 25 to 30 (usually 28 or 29) 

 marginal plumose setae. 



Maxilliped 1 (Figure 5H). Coxopodite with 2 

 (rarely 1) setae. Endopodite as in third zoea. 

 Exopodite with 9 terminal natatory setae. 



Maxilliped 2 (Figure 51). Coxopodite with no 

 (rarely 1 very small) seta. Three-segmented en- 

 dopodite setation 1, 1, 5-I-I (rarely 4+1). Exopodite 

 with 11 terminal natatory setae. 



Maxilliped 3 (Figure 5J). Greatly enlarged from 

 third zoea, epipodite and endites well developed, 

 not yet segmented. 



Pereiopods (Figure 5 A, B). Greatly enlarged 

 from third zoea, with incipient segmentation and 

 differentiation. 



Abdomen (Figure 5 A, B). Somite 1 with 3 pos- 

 terodorsal setae, slight posterolateral projections. 

 Somites 2-6 as in third zoea but pleopod buds en- 

 larged and biramous on somites 2-5, small and 

 uniramous on somite 6. 



Telson (Figure 5A, B). Median sinus with 3 or 4 

 small plumose setae. Secondary minute lateral 

 furcal spines may or may not be present as in 

 second zoea. 



Color. Rostrum, antennules, antennae pale 

 orange. Maxilliped 1 and 2 basipodites proximally 

 with prominent burnt-orange stellate chromato- 

 phores, diffused with pale mint green at 

 basipodite-exopodite junction. Mandible incisor 

 and molar surfaces fringed in dark Vandyke 

 brown blending into scarlet and burnt orange. 

 Orbits pale mint green. Sky-blue stellate 

 chromatophore mixed with pale green and yellow 

 at dorsal spine base. Lateral spines with burnt- 

 orange and Vandyke-brown stellate chromato- 

 phores blending into mint green distally. Body 

 (cephalothorax) generally pale yellow-orange 

 mixed with faint mint green. Gastric region and 

 gut burnt orange extending through abdominal 

 somite 3. Abdominal somites 2-5 with paired 

 patches of pale burnt orange lateral to pleopod bud 

 origins, otherwise colorless. Telson entirely pale 

 orange diffused with mint green in vicinity of lat- 

 eral and dorsal furcal spines. 



Megalopa 



Carapace length (rostrum tip to median poste- 

 rior margin) x greatest width: 1.25 mm x 1.20 

 mm. 



Number of specimens examined: 1. 



Carapace (Figure 6A-C). Slightly longer than 

 wide, subrectangular, somewhat inflated. Frontal 

 region produced, highly sculptured; rostrum 

 prominent, acutely triangular, sharply rounded, 

 becoming broader at base, recurving anteriad into 

 prominent anterolateral horns; latter one-half 

 rostrum length, each with a small lateral spine 

 bearing 2 small apical setae near base, oriented 

 perpendicular to longitudinal axis of horn. Four 

 prominent plumose setae equal in length to ros- 

 trum project anteriorly between rostrum base and 

 base of each horn. Several smaller setae scattered 

 in interorbital, gastric, and cardiac regions. One 

 small tubercle projecting near median posterodor- 

 sal margin. Numerous setae fringe posterior and 

 ventrolateral margins. 



Antennule (Figure 6D). Biramous; peduncle 

 three-segmented; proximal article with 2 small 

 plumose setae and 1 naked seta, penultimate arti- 

 cle with 1 naked seta, ultimate article with 2 small 

 lateral setae and 6 nearly terminal, long, naked 

 setae (arranged as 3 on either side of segmented 

 flagellum). Ventral ramus with 3 terminal, 1 

 slightly subterminal, naked setae; dorsal ramus 

 with aesthetascs progressing distally as follows: 

 (8), (6, +1 plumose seta opposite), (3 lateral, +3 

 nonplumose setae near tip). 



Antenna (Figure 6E). Peduncle with 3 lateral 

 setae, a distal lobe; setation (proximally to dis- 

 tally) on flagellar articles 1, 1, 0, 3, 4, 0, 0, 5. 

 Articles 5 and 6 slightly constricted at midlength, 

 may be partially segmented. 



Mandibles, maxillule, maxilla, and maxillipeds 

 1 and 2 . These were not dissected from the speci- 

 men to prevent the destruction of the only 

 megalopa obtained. 



Maxilliped 3 (Figure 6F). Coxopodite and epipo- 

 dite not exposed for examination. Basipodite par- 

 tially exposed with at least 16 short setae. 

 Endopodite five-segmented, setation progressing 

 distally 16, 14, 8, 12, 8 (5 lateral, 3 apical). Exopo- 

 dite two-segmented; proximal segment with 3 lat- 

 eral setae, distal segment with 1 subterminal seta 

 and 6 long, plumose terminal setae. 



Pereiopods (Figure 6A-C, 6G-I). All bear numer- 

 ous setae. Chelipeds (Figure 6G) similar, equal; 



497 



