Agononida squamosa (Henderson, 1885)

(Figs 5–6)

Size: CL= 0.75 mm; EL= 0.60 mm.

Carapace (Figs. 5 A,B). Typical galatheid larval form; without setae; rostrum elongated, surface with spinules; acute spines posteriorly, posterodorsal margin with 15 or 16 teeth and posteroventral margin with 17 or 18 teeth; eyes sessile and long, the EL more than 1/2 of CL.

Antennule (Fig. 5 C). Uniramous, endopod absent, with 6 setae terminally (not completely extruded) and 1 long subterminal plumose setae.

Antenna (Fig. 5 D). Biramous; protopod with 1 spinose process with 2 rows of spinules, probably shorter than endopod; endopod unsegmented, without setae and with sparse spines; exopod (scaphocerite) ending in process not completely extruded in any examined individuals, inner margin with 8 plumose setae and 1 simple seta.

Mandible. Similar to Neonida grandis, left and right mandibles developed molar processes strongly spinose; palp absent.

Maxillule (Fig. 5 E). Setae not completely extruded, but clearly observable. Coxal endite with 7 sparsely plumose setae; basial endite with 5 setae (2 strong prominent cuspidate setae); endopod 2­segmented with 5 setae on distal segment (1 subterminal simple seta + 4 terminal setae).

Maxilla (Fig. 6 A). Setae not completely extruded, but clearly observable. Coxal endite bilobed with 8+4 setae; basial endite bilobed with 5+4 setae; endopod unsegmented, bilobed, with 3 +4 setae and mat of microtrichia in outer margin; exopod (scaphognathite) lobe developed anteriorly only and with 4 marginal plumose seta and 1 long posterior plumose process.

First maxilliped (Fig. 6 B). Setae not completely extruded, but clearly observable. Coxa with 2 setae; basis with 11 (2,3,3,3) sparsely plumose setae on ventral margin; endopod 5­segmented with 3,2,1,2,5 (1 subterminal + 4 terminal) setae; exopod 2­ segmented with 4 terminal setae.

Second maxilliped (Fig. 6 C). Setae not completely extruded, but clearly observable. Coxa without setae; basis with 3 sparsely plumose setae (1, 2) on anteroventral margin; endopod 4­segmented with 2,2,2,5 (1 subterminal + 4 terminal) setae; exopod 2­ segmented with 4 terminal setae.

Third maxilliped. Small unsegmented bud.

Pereiopods. Absent.

Abdomen. Five somites plus telson; somites 4 and 5 with posterolateral processes; somites 2–5 each with pair of posterodorsal setae and without denticles or teeth on posterior margin; pleopods absent.

Telson. Forked with median cleft; with 7+7 processes not completely extruded, first (lateralmost) immovable spine, second short plumose seta (anomuran hair), third to seventh bearing long, stout plumose setae and minute spinules.