Indanthura sculpta (Kensley 1980)

Alloanthura sculpta

MATERIAL.—Holotype: USNM 171689, Sta AB 373B, 1 , TL 10.2 mm.

DESCRIPTION.—Cephalon almost two-thirds length of pereonite 1, with large dorsolateral eyes, impressed sinuous line behind eyes plus irregular, shallow dorsal pits; lateral margin a rounded ridge. Body proportions: C <1<2 = 3 = 4 = 5>6>7. Pereonites each with strong, rounded dorsolateral ridge and groove and shallow, irregular sculpture. Pleonites 1–5 fused, but lines of fusion marked by distinct shallow grooves; fused pleonite 1 larger than 2, 2–5 equal in length; pleonite 6 fused to telson. Latter strongly indurate, ventral surface concave; dorsally with strong, rounded median ridge running entire length, with pair of statocysts at base; distal half of telson narrowed, apex narrowly rounded.

Antennular peduncle 4-segmented, basal segment almost as long as three distal segments together, fourth segment one-third length of third; flagellum of two articles, proximal article five times length of terminal article. Antennal peduncle 5-segmented, second segment largest, grooved to accommodate antennule; flagellum of six short articles. Mandibular palp 3-segmented, first and third segments subequal, terminal segment with six distal serrate spines; incisor of three blunt, rounded cusps; lacinia of five serrations; molar oblong-truncate. Maxilla with one large and six smaller, apically hooked spines distally. Maxilliped 5-segmented; terminal segment oblique, with four setae on median margin; endite lacking; outer face bearing numerous fine setules. Pereopod 1 unguis almost half length of dactylus; palm of propodus straight, bearing five fringed setae, palmar surface covered with tiny pectinate scales; remaining segments with fine, dense setules. Pereopods 2–7 similar, unguis one-quarter length of dactylus, posterior margin of propodus straight, with single distal spine; carpus about half length of propodus, barely underriding propodus. Exopod of pleopod 1 operculiform, indurate, durate, with two rounded ridges on anterior (outer) surface; endopod considerably shorter and narrower, with two distal plumose setae. Uropodal exopod very reduced, folded over proximal part of telson, narrow, not reaching midlength of basis, outer margin serrate and setose; endopod oval, margin serrate; basis produced on inner (median) margin into broad lobe, almost reaching apex of endopod.

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