Bamarooka tropicalis, Lowry & Stoddart, 2002

Lowry, J. K. & Stoddart, H. E., 2002, The Amaryllididae of Australia (Crustacea: Amphipoda: Lysianassoidea), Records of the Australian Museum 54, pp. 129-214 : 192-195

Bamarooka tropicalis n.sp.

Figs. 58–60

Type material. HOLOTYPE, female, 6.0 mm, ovigerous (5 eggs), AM P37074; 1 PARATYPE, male, 3.9 mm, AM P37075 ; 5 PARATYPES, AM P37076 ; northwest of Port Hedland, North West Shelf, Western Australia, eastern Indian Ocean , 19°29.2'S 118°52.5'E to 19°29.5'S 118°52.3'E, 40–41 m, epibenthic sled, 28 June 1983, FRV Soela , CSIRO stn NWS 03 .B8.S. 5 PARATYPES, AM P37077, same locality, 19°29.6'S 118°52.2'E to 19°29.4'S 118°52.8'E, 38 m, epibenthic sled, 30 August 1983 , CSIRO stn NWS 04 .B8.S. 6 PARATYPES, AM P37078, same locality, 19°29.4'S 118°52.5'E to 19°30.0'S 118°51.6'E, 38 m, epibenthic sled, 25 October 1983, FRV Soela , CSIRO NWS stn 05.D8.S. 10 PARATYPES, NMV J7667 , North West Shelf, Western Australia, eastern Indian Ocean , 19°39'S 116°22'E to 19°39'S 116°43'E, 46 m, bryozoans, G.C.B. Poore & H.M. Lew Ton, 7 June 1983, FRV Soela, stn NWA-33 .

Additional material. WESTERN AUSTRALIA: 19 specimens, AM P37079 to P37087, from 9 CSIRO North West Shelf stations close to type locality, 36–40 m, dredged, June–October 1983. N ORTHERN TERRITORY : 1 specimen, AM P58075, S side of New Year Island, Arafura Sea , 10°54'S 133°02'E, 14 m, hydroids, G.C.B. Poore, 14 October 1982, stn NT-20 . 2 specimens, AM P58076, same locality, 14 m, alga Padina, J.K. Lowry , 14 October 1982, stn NT-25 . 1 specimen, AM P58077, same locality, 14 m, rubble, J.K. Lowry, 14 October 1982, stn NT-26 . 1 specimen, AM P37088, patch reefs at NW end of McCluer Island , 11°02'S 132°58'E, 8 m, red algae and sediment, J.K. Lowry, 16 October 1982, stn NT-38 . 2 specimens, AM P58078, S end of McCluer Island, Arafura Sea , 11°06'S 133°00'E, 8 m, coral rubble, G.C.B. Poore, 17 October 1982, stn NT-55 . 1 specimen, AM P58079, same locality, 8 m, red algae? Champsia, J.K. Lowry, 17 October 1982, stn NT-58 . 14 specimens, AM P37089, same locality, 8 m, Acropora base, P. Horner, 17 October 1982, stn NT-59 . 3 specimens, AM P58080, same locality, 8 m, coral rubble with encrusting invertebrates, J.K. Lowry, 17 October 1982, stn NT-60 . 2 specimens, AM P37090, same locality, 8 m, Seriatopora hystrix, J.K. Lowry , 17 October 1982, stn NT-61 . 6 specimens, AM P37091, W of East Point, north end of Fannie Bay, Darwin , 11°24.5'S 130°48.5'E, 8–10 m, encrusting ascidian Didemnum psammodes, J.K. Lowry , 26 October 1982, stn NT-97 . 3 specimens, AM P58081, same locality, 8–10 m, red alga, J.K. Lowry, 26 October 1982, stn NT-103 . 1 specimen, AM P18172, Port Darwin , [approx. 12°27'S 130°50'E], W.E.J. Paradice on HMAS Geranium . QUEENSLAND: 1 specimen, AM P37092, fringing reef between Bird Islet and South Island, Lizard Island , 14°40'S 145°28'E, 24.4–27.4 m, Halophila , mixed algae and coral rubble, J.K. Lowry, 7 October 1978, stn QLD-21 . 4 specimens, AM P37093, same locality, 27.6 m, Halophila , mixed algae and sediment from seagrass beds on reef base, J.K. Lowry & P.C.Terrill, 9 October 1978, stn QLD-27&28 . 1 specimen, AM P37094, Lizard Island , 3 m, plankton tow in lagoon, J.M. Leis, 17 October 1979, stn JML 17.10.2 . 1 specimen, AM P37095, between Lizard Island and Carter Reef , 32–38 m, algae and sediment, epibenthic sled, J.M. Leis, 26 November 1981, stn JML 81/26-1-4 .

Type locality. Northwest of Port Hedland, North West Shelf, Western Australia, eastern Indian Ocean , 19°29'S 118°52'E, 40–41 m depth .

Description. Based on holotype female, 6.0 mm, AM P37074. Head much deeper than long, anterior margin with notch extended into a slit; rostrum absent; eye elongate, reniform. Antenna 1 peduncular article 1 not ball-shaped proximally, distal margin with small medial spine; peduncular article 2 medium length; flagellum without callynophore, calceoli absent. Antenna 2 flagellum about as long as that of antenna 1, without calceoli. Mouthpart bundle subconical. Epistome/upper lip almost straight (lateral view). Mandible lacinia mobilis a stemmed, distallycusped blade; accessory setal row with intermediate setae; palp article 2 without posterodistal setae, article 3 without A3-seta. Maxilliped outer plate with distal margin smooth, medial margin without notch.

Gnathopod 1 carpus shorter than propodus (0.8×); propodus, posterior margin without robust setae. Gnathopod 2 palm slightly acute, with no lateral robust setae, 1 medial robust seta. Pereopods 3 and 4 merus and carpus without setal fringe. Pereopod 4 coxa with anterior margin slightly obtuse, posterior margin rounded, anteroventral corner rounded. Pereopods 5–7 with distal articles elongate, dactyli short and stocky. Pereopod 5 basis expanded posteriorly, rounded with sloping posteroproximal shoulder. Pereopod 7 basis rounded posteriorly, posteroventral corner rounded, posteroventral margin curved.

Epimeron 3 posterior margin smooth, with notch well above rounded posteroventral corner. Uropod 1 peduncle dorsolateral margin with 7 robust setae; outer ramus without large spines between robust setae. Uropod 2 inner ramus slightly constricted. Uropod 3 rami lanceolate; without plumose setae; outer ramus 1-articulate. Telson moderately cleft (about 36%).

Male (sexually dimorphic characters). Based on paratype male, 3.9 mm, AM P37075. Antenna 1 flagellum with callynophore. Mandible palp article 2 with 1 posterodistal seta.

Etymology. The specific name is a reference to the species’ distribution in Australia.

Remarks. Bamarooka anomala and B. tropicalis both have elongate, reniform eyes. They are easily distinguished from each other by their fifth pereopods, which have a linear basis in B. anomala and an expanded basis in B. tropicalis .

Habitat. Bamarooka tropicalis has been found with algae, seagrasses, sediments, ascidians, bryozoa and hydroids, but most commonly among corals and coral rubble.

Distribution. Northern Australia, from North West Shelf off Western Australia to northern Great Barrier Reef, Queensland; 3–40 m depth.

Lowry & Stoddart: Australian Amaryllididae (Amphipoda) 195

Erikus Lowry & Stoddart

Erikus Lowry & Stoddart, 1987: 1303 .

Diagnosis. Mouthpart bundle subconical. Mandible palp article 3 with proximal A3-seta. Pereopod 4 coxa with anterior and posterior margins subparallel. Pereopods 5–7 with distal articles elongate. Uropod 3 rami lanceolate; with plumose setae in male and female; outer ramus 2-articulate.

Type species. Erikus dahli Lowry & Stoddart, 1987 , by original designation.

Species composition. Erikus contains one species: E. dahli Lowry & Stoddart, 1987 .

Remarks. When Lowry & Stoddart (1987) described Erikus dahli they recorded the uropod 3 outer ramus as 1-articulate. Closer examination has shown that a small, spine-like second article is present. None of the Australian species of Amaryllis have a 2-articulate outer ramus on uropod 3 but specimens in several non-Australian literature records of

Amaryllis macrophthalma clearly do. Material from Patagonia (Stebbing, 1888), Argentina ( Alonso, 1987), Mauritius ( Ledoyer, 1978), Madagascar ( Ledoyer, 1979; 1986) and the Red Sea (Lyons & Myers, 1991) all have the spine-like article 2 either illustrated or described. Stebbing (1908: South African material) and Schellenberg (1931: South American material) have recorded Amaryllis macrophthalma with plumose setae on male pereopods 3 and 4; Stebbing (1908: South African material), K.H. Barnard (1916: South African material), Ledoyer (1979; 1986: material from Madagascar) have recorded Amaryllis macrophthalma with pappose setae on uropod 3; and Ledoyer (1986: material from Madagascar) has recorded Amaryllis macrophthalma with A3-setae on the mandibular palp. None of these characters occur in any Australian species of Amaryllis , but all three characters occur in Erikus dahli . In our opinion none of these records belong in the genus Amaryllis ; they most likely belong in the genus Erikus .

Distribution. Erikus is a shallow-water genus currently known from southern South America, but there is evidence that it also occurs in Africa (see Fig. 61)