Yhi yindi Barnard & Thomas, 1991

Hughes, L. E., 2009, Paracalliopiidae *, Zootaxa 2260 (1), pp. 759-765 : 762-765

Yhi yindi Barnard & Thomas, 1991

( Figs 3 , 4 )

Yhi yindi Barnard & Thomas, 1991: 288 , figs 1–3. — Lowry & Stoddart, 2003: 206 (catalogue).

Material examined. Not collected in the current survey.

Type locality. Orpheus Island , Great Barrier Reef, Queensland, Australia .

Description. Based on holotype, female, 1.5 mm, NMV J20847 , paratype, male, 1.5 mm, USNM 253538.

Head. Head lateral cephalic lobe not developed; eyes separated, positioned laterally, ommatidia scattered. Antenna 1 peduncle article 1 subequal to article 2, subequal to article 3; article 2 subequal to article 3; flagellum with 4 articles; accessory flagellum absent. Antenna 2 flagellum with 6 articles. Maxilla 1 inner plate without apical setae, with 2 large plumose medial setae. Maxilla 2 inner plate without medial setae, without oblique setal row. Mandible palp absent; molar triturative; accessory setal row with 2 setae. Lower lip mandibular lobes apically rounded, with extensions directed facially. Maxilliped palp exceeding outer plate.

Pereon. Coxae 1–7 subequal to depth of pereonites. Gnathopod 1 coxa with rounded distal expansion; carpus approximately 3 x longer than propodus; propodus weakly subchelate, not distally expanded; dactylus reaching length of palm. Gnathopod 2 slender; carpus longer than the propodus, carpal lobe absent; propodus simple; dactylus reaching the length of the palm. Pereopods 3–6 fossorial. Pereopod 7 much longer than pereopods 5–6; basis posterior margin straight, dentate, basis posterodistal corner rounded, extending part way along ischium.

Pleon. Epimera 1–2 posterodistal corners rounded. Epimeron 3 posterodistal corner rounded, without ventral robust setae. Urosomites 2–3 fused. Uropod 1 rami subequal in length; outer ramus with 2 robust seta. Uropod 2 rami subequal in length; rami without robust setae. Uropod 3 peduncle elongate, twice as long as broad; rami subequal in length, or inner ramus longer than outer ramus; rami without robust setae. Telson subquadrate, with apical setae.

Habitat. Coral-algal sand, 4 m depth.

Remarks. This species, currently the only one in the genus, is distinguished from other Paracalliopiidae by the separated non-contiguous laterally positioned eyes, the absence of a mandibular palp and the anteriorly directed coxa 1.

Distribution. Australia. Queensland: Orpheus Island ( Barnard & Thomas 1991).

Figures

FIGURE 3. Yhi yindi Barnard & Thomas, 1991, holotype, female, 1.5 mm, NMV J20847; ‘a’ female, 1.61 mm, USNM 253539, Orpheus Island, Great Barrier Reef (after Barnard & Thomas 1991).

FIGURE 4. Yhi yindi Barnard & Thomas, 1991, holotype, female, 1.5 mm, NMV J20847; ‘b’ male, 1.52 mm, USNM 253538, Orpheus Island, Great Barrier Reef (after Barnard & Thomas 1991).