Parhalimedon kyhursti, Hughes, 2009

Hughes, L. E., 2009, Exoedicerotidae *, Zootaxa 2260 (1), pp. 430-433 : 431

Parhalimedon kyhursti

( Figs 1 , 2 , Pl. 3E)

Type material. Holotype, female (dissected, 3 slides), 6.0 mm, AM P80173 (QLD 56); 200 m north-west of Palfrey Island, Lizard Island , Queensland (14°40'S 145°28'E), sand from base of reef slope, edge of patch reef, 12.2 m, P. Terrill, 14 October 1978 . Paratypes: 1 female (partial dissection), AM P80171 (QLD 56) ; 1 male (dissected, 2 slides), AM P80172 (QLD 56); 6 unsexed specimens, AM P80174 (QLD 56) .

Additional material examined. 8 unsexed, AM P28310 (HI-3); 2 unsexed, AM P80170 (JML16-10-9); 2 unsexed, AM P28464 (QLD 13); 1 unsexed, AM P71291 (QLD 1763); 9 unsexed, AM P70840 (QLD 1666); 3 unsexed, AM P78146 (QLD 46); 3 unsexed, AM P70905 (QLD 1672); 9 specimens, AM P70840 (QLD 1666); 1 female, Photo, AM P70780 (QLD 1666) .

Type locality. 200 m north-west of Palfrey Island, Lizard Island , Queensland (14°40'S 145°28'E) .

Etymology. Named for the Queensland long distance swimmer Ky Hurst.

Description. Holotype, female, 6.0 mm, AM P80173.

Head. Head rostrum small, less than one third of head depth. Eyes subovoid. Antennae 1 flagellum 10 - articulate; calceoli absent. Antennae 2 unknown. Mandible accessory setal row with 4 setae; molar well developed, triturative; palp clavate. Maxilla 1 inner plate medial margin with row of setae; palp with short bicuspidate robust setae and with slender setae. Maxilla 2 inner plate with oblique setal row. Maxilliped palp extending only slightly beyond inner plate; inner plate broad and enlarged, with evenly spaced rows of short robust setae.

Pereon. Gnathopods 1 and 2 similar in males and females, reduced. Gnathopod 1 coxa large, not hidden by coxa 2; carpus about as long as propodus, three times as long as broad; propodus weakly subchelate; dactylus well developed. Gnathopod 2 carpus four times as long as broad, about as long as propodus; dactylus well developed. Pereopod 4 coxa posterior margin without posteroventral lobe. Pereopod 7 articles distally tapering towards the dactylus; basis distally narrow, much longer than pereopod 5 and 6, with posteroventral margin excavate.

Pleon. Epimeron 1–3 with many marginal setae. Epimeron 2 posteroventral corner without spine. Epimeron 3 posteroventral corner subquadrate. Uropod 1 peduncle longer than rami, with distomedial spur; rami with apical robust setae present; inner ramus longer than outer ramus. Uropod 2 peduncle lined with short slender robust setae; rami with apical robust setae present; inner ramus longer than outer ramus. Uropod 3 biramous, greatly enlarged, reaching beyond uropod 1, with long slender rami; rami apical robust setae absent, margins with slender robust setae. Telson weakly subquadrate; apical margin concave, with a pair of apical and lateral short slender setae.

Habitat. Marine, shallow-water, fine and coarse sand.

Remarks. Parhalimedon kyhursti sp. nov. is placed within the genus based on the following characters: maxilliped with enlarged inner plates; pereopod 7 basis narrow distally; and uropods 1–2 with the inner ramus longer than the outer ramus. In P. kyhursti and P.turqueti antenna 1 has fewer articles (10 –11- articulate) than in P. tropicalis (~14–articulate). The apical margin of the telson is convex in P. kyhursti , straight in P. tropicalis and concave in P. turqueti . The new species also differs from P. tropicalis and P. turqueti in the carpus of gnathopods 1–2 which is subequal in length to the propodus.

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

Figures

FIGURE 1. Parhalimedon kyhursti sp. nov., holotype, female, 6.0 mm, AM P80173, Palfrey Island, Lizard Island, Great Barrier Reef.

FIGURE 2. Parhalimedon kyhursti sp. nov., holotype, female, 6.0 mm, AM P80173, Palfrey Island, Lizard Island, Great Barrier Reef.