Projasus bahamondei George 1976

Description of final phyllosoma stage of Projasus bahamondei.

Dimensions: TL= 54.3 mm; CL= 34.9 mm; CW= 39.2 mm; TW= 16.8 mm; PW= 4.6 mm.

Cephalothorax (Figs 1, 3A, B): cephalon circular, wider than long (CL/CW ratio=0.89), much wider than thorax (CW/TW ratio=2.33). Median rounded rostrum shortly protruded (Fig. 3B: r). Small overhang plate behind the base of eyestalk (Fig. 3B: op). Eyes stalked, 9.7 mm in stalk length.

Antennule: missing in the present specimen.

Antenna: missing in the present specimen.

Mandibles (Fig. 4A): slightly flattened dorso-ventrally, asymmetrical in dentition. Incisor process, medial gnathal edge with a series of teeth. Molar process crowned by many denticules and minute papilla. Labrum, paragnath (Fig. 4A′) well-developed, cover distal inner half portion of mandibles.

Maxillule (Fig. 4B): rudimentary endopod projection with two, long and minute, simple setae, near anterior base. Basial endite with 5 stout spines (Fig. 4B: ss) and 10 subterminal setae. Coxal endite with 11 moderate lengths setae.

Maxilla (Fig. 4C): endopod with 3 distal setae and a minute subterminal seta. Basial and coxal endite with 6 and 3 setae, respectively. Scaphognathite with 126 marginal plumose setae.

Maxilliped 1 (Fig. 4D): exopod incipiently 2-segmented process. Epipod rudimentary lobe.

Maxilliped 2 (Fig. 4E): biramous, with gill rudiments. Endopod 3-segmented, with no setae on proximal, 11 distal setae on second, and a long stout spine and 13 setae on distal segment. Exopod with 17 annulations, each annulation with a pair of natatory plumose setae.

Maxilliped 3 (Fig. 4F): biramous, with gill rudiments. Endopod 3-segmented, numerous setae on distal segment. Exopod with 17 annulations, each annulation with a pair of natatory plumose setae.

Pereiopods 1–5 (Fig. 3A, E): biramous, with gill rudiments except for pereiopod 5 (Fig. 4G), but distal part of endopod, merus to dactylus, missing. No subexopodal spine was confirmed in pereiopods 1–3 and 5, while pereiopod 4 missing (Fig. 3A). Gill rudiments on thorax pleura (Fig. 3C).

Pleon (Fig. 3D–F): much narrower than thorax (PW/ TW=0.27), fully segmented with four pairs of biramous pleopods (Fig. 3E, F) on somites 2–5. Pleonites 5 and 6 with strong dorsal median spine (Fig. 3E). Uropods biramous, posterior margins of endopod and exopod not outreaching posterior end of telson (Fig. 3D, E). Telson rectangular, slightly narrowing posteriorly, with pair of lateral spines (Fig. 3D).