Doowia dexterae Barnard & Drummond, 1987

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

Doowia dexterae Barnard & Drummond, 1987

( Figs 1 , 2 )

Doowia dexterae Barnard & Drummond, 1987:123 , figs 5–6. — Lowry & Stoddart, 2003: 205 (catalogue). Material examined. Male, dissected, 3.4 mm, 3 slides, AM P77831 (QLD 36); female, dissected, 3.5 mm, 2 slides AM P77832 (QLD 36); 67 specimens, AM P27189 (PS 2-2); many specimens, AM P27188 (PS 2-2); many specimens, AM P28479 (QLD 36); 16 specimens, AM P25537 (PS 2-5); 15 specimens, AM P25538 (PS 22.5-1); 50 unsexed, AM P77833 (SEL/LZI 5-1).

Type locality. Redcliffe Beach , near Brisbane, Queensland, Australia (27º14’S 150º07’E) .

Description. Based on male, 3.4 mm, AM P77831.

Head. Head lateral cephalic lobe absent. Eyes ovoid, adpressed at top of head. 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 12 articles. Maxilla 1 inner plate with 1 apical seta, with row of medial setae. Maxilla 2 inner plate with oblique setal row. Mandible palp present; article 1 shorter than article 2, subequal to article 3; article 2 longer than article 3; without basofacial setae; molar triturative; accessory setal row with 5 setae. Lower lip mandibular lobes apically rounded, with extensions directed axially. Maxilliped palp exceeding outer plate.

Pereon. Coxae 1–7 subequal to depth of pereonites. Gnathopod 1 coxa with rounded distal expansion; carpus shorter than propodus; propodus subchelate, not distally expanded; dactylus reaching length of palm. Gnathopod 2 stout; carpus shorter than the propodus, cup-shaped, carpal lobe absent; propodus subchelate, palm subacute, entire, palm lined with robust setae, without robust setae defining posterodistal corner of palm; dactylus reaching length of the palm. Pereopods 3–6 fossorial. Pereopod 7 much longer than pereopods 5–6; basis posterior margin straight, smooth, posterodistal corner rounded, extending part way along ischium.

Pleon. Epimera 2–3 posterodistal corners subquadrate. Urosomites 2–3 fused. Uropod 1 rami subequal in length; inner ramus with 3 robust setae, outer ramus with 1 robust seta. Uropod 2 rami subequal in length; inner ramus with 1 robust seta; outer ramus with 1 robust seta. Uropod 3 peduncle elongate, twice as long as broad; rami subequal in length; rami without robust setae. Telson subquadrate, with medial setae.

Female (sexually dimorphic characters). Based on female, 3.5 mm, AM P77832. Gnathopod 1 carpus longer than propodus, carpal lobe present; propodus twice as long as broad. Gnathopod 2 slender; carpus longer than the propodus, carpus subtriangular, carpal lobe present, lobe about as long as broad; propodus twice as long as broad, palm acute.

Habitat. Sandy beaches, surf zone.

Remarks. Differences between Doowia dexterae and Doowia cooma Barnard & Drummond, 1987 , the two species of Doowia described from Australia, are very slight. The GBR material described here is larger than original material of D. dexterae but has less robust setae on the uropods, a character identified as increasing in number with size. The reduced number of robust setae on the uropods in combination with the 8 oblique setae on the inner plate of maxilla 2 (3 oblique setae in D. dexterae ) would appear to align the GBR material with D. cooma Barnard & Drummond, 1987 . However, the female GBR material examined has well developed carpal lobes on gnathopods 1–2 as in D. dexterae (weakly developed in D. cooma ). The male gnathopod 1 propodus palm in GBR material has a greater number of robust setae as in D. dexterae . I consider these later two characters to be more important for differentiating D. dexterae from D. cooma , and therefore assign the GBR species to D. dexterae .

Distribution. Australia. Queensland: Redcliffe Beach, near Brisbane ( Barnard & Drummond 1987), South Bribie Island ( Barnard & Drummond 1987), Lizard Island (current study).

Figures

FIGURE 1. Doowia dexterae Barnard & Drummond 1987, male, 3.4 mm, AM P7783, Lizard Island Great Barrier Reef.

FIGURE 2. Doowia dexterae Barnard & Drummond 1987, male, 3.4 mm, AM P77831; female, 3.5 mm AM P77832, Lizard Island, Great Barrier Reef.