(Figs 1, 2)

Type material. Holotype, male, 1.8 mm, AM P70806, Ferriers Creek, Lizard Island (14 o 39’56”S 145 o 27’03”E), algae from rocks at edge of mangroves (Rhizophora stylosa), hand collected, 0.5 m, S.E. LeCroy, R. A. King, K.N. Klebba & T. Krapp-Schickel, 23 February 2005 (QLD 1655). Paratype: female, 1.9 mm, same data as holotype, AM P70806 (QLD 1655).

Other material examined. 1 male, AM P70805 (QLD 1655); 2 females, AM P70924 (QLD 1677); 1 male, 7 females SEL/LZI 6-2.

Type locality. Ferriers Creek, Lizard Island, Queensland, Australia.

Etymology. Named for its very small size.

Description. Based on holotype, male 1.8 mm, AM P70806.

Head. Head lateral cephalic lobes rounded; eye large, composed of many ommatidia. Antenna 1 very short, less than one third body length; flagellum composed of 4–5 articles; accessory flagellum absent. Antenna 2 short, subequal in length with antenna 1; article 4 lacking a posterodistal lobe; flagellum with 3 articles. Mandible palp articles 2 and 3 subequal; article 3 subovoid with long distal setae.

Pereon. Gnathopod 1 coxa enlarged, distally expanded; carpus longer than propodus, posterior margin densely setose; propodus subchelate. Gnathopod 2 merus enlarged and distally free, with dense long setae forming a sieve together with setae on carpus; propodus slender, twice as long as broad, with posterodistal spine and palmar excavation; dactylus greatly overlapping palm. Pereopods 5–7 basis posterior margin with dense pectinate setae.

Pleon. Urosomites fused. Uropod 1 peduncle with short distoventral spine; rami margins with robust setae and with terminal cluster of robust setae. Uropod 2 inner ramus subequal in length with peduncle; outer ramus much shorter than inner ramus. Uropod 3 biramous; peduncle without distal expansion; outer ramus minute.

Female (sexually dimorphic characters). Based on paratype, female, 1.9 mm, AM P70806. Gnathopod 2 propodus slender, lacking posterodistal spine.

Habitat. Algae near mangroves.

Remarks. This species is similar to P. brisbanensis Chapman, 2002, but differs in a number of ways. The male antenna 2 article 4 lacks a posterodistal lobe; the mandible palp is much shorter with article 3 sub-ovoid; the carpus of gnathopod 1 is much more slender; the propodus of gnathopod 2 is also slender with a short posterodistal spine and weakly developed palmar spine; uropods 1–2 have fewer, weaker robust setae; the uropod 1 distoventral spine is acute (rounded in P. brisbanensis); uropod 3 inner ramus has a marginal robust seta (absent in P. brisbanensis). In addition, this species is much smaller, at less the 2.0 mm (P. brisbanensis up to 4.4 mm).

Distribution. Australia. Queensland: Lizard Island (current study).