Bamarooka endota, 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 : 185-189

Bamarooka endota n.sp.

Figs. 51–54

Amaryllis macrophthalma .– Stebbing, 1910a: 569 (in part, part = A. kamata ).

Type material. HOLOTYPE, female, 7.5 mm, ovigerous (5 eggs), NMV J13937 ; 1 PARATYPE, male, 5.9 mm, NMV J13938 ; 10 PARATYPES, 4.0– 8.8 mm, AM P36897; 66 km south of Rodondo Island , central Bass Strait, Australia, 39°48.6'S 146°18.8'E, 82 m, sand, silt and mud, epibenthic sled , R. Wilson , 23 November 1981 , RV Tangaroa , cruise 81-T-1, stn BSS-158S. 10 PARATYPES, AM P59022 ; 23 PARATYPES, NMV J13939 ; 57 km S of Rodondo Island, central Bass Strait , Australia, 39°46.0'S 146°18.0'E, 80 m, muddy shell, epibenthic sled , R. Wilson , 13 November 1981 , RV Tangaroa , stn BSS- 159S. 4 PARATYPES, NMV J13945 , 57 km S of Rodondo Island , central Bass Strait, Australia, 39°43.5'S 146°18.8'E, 80 m, muddy shell, grab, G.C.B. Poore, 13 November 1981 , RV Tangaroa , stn BSS-159G.

Additional material. NEW SOUTH WALES: 1 specimen, AM P36904, E of Newcastle, 32°53'S 152°35'E, 146–165 m, 15 August 1985, FRV Kapala , stn K85-12-23. 12 specimens, AM P37397, SE of Broken Bay , 33°36'S 151°30'E to 33°37'S 151°29'E, 71–75 m, benthic trawl, 10 February 1986, Kapala , stn K86-01-02. 2 females, 2 males, AM P36905, E of Long Reef Point, 33°43'S 151°46'E to 33°44'S 151°46'E, 174 m, trawl, 19 December 1985, FRV Kapala , stn K85-21-08. 5 specimens, AM P36902, E of Long Reef Point, 33°46'S 151°43'E, 175 m, dredged, 5 December 1977, FRV Kapala , stn K77-23-01. 5 females, AM P36903, E of Bondi, 33°52'S 151°23'E, 80 m, dredged, 11 December 1980, FRV Kapala , stn K80-20-11. 1 male, AM P22060, E of Malabar, 33°58.0'S 151°20.6'E, 75 m, sandy gravel, shipek grab, 25 May 1972, AMSBS stn C6. 2 females, AM P36899, 8 – 9.5 km E of Coogee, [approx. 33°57'S 151°21.5'E], 90–91 m, fine sand, E. R. Waite, 15 March 1898, HMCS Thetis, stn 44. 1 specimen, AM P36901, 4– 6 km E of Botany Bay, [approx. 34°01'S 151°19'E], 60–102 m, trawl, F.A. McNeill & A. Livingstone, August 1921, ST Goonambee. 1 specimen, AM P37398, E of Port Hacking, [approx. 34°03'S 151°12'E], 40–69 m, sand, E. R. Waite, 10 March 1898, HMCS Thetis, stn 35. 1 female, AM P36898, 3– 4 km off

Botany Bay , [approx. 34°05'S 151°15'E], 91–95 m, mud, E. R. Waite, 11 March 1898, HMCS Thetis, stn 37. 3 females, AM P36900, 5.5–6.5 km E of Wattamolla, [approx. 34°10'S 151°11'E], 108– 99 m, mud, E. R. Waite, 22 March 1898, HMCS Thetis, stn 57. 2 specimens, AM P36908, off Montague Island , [approx. 36°15'S 150°14'E], from stomach of jackass fish Nemadactylus macropterus , April 1939, K. Sheard Collection. BASS STRAIT: 2 specimens, AM P58119, eastern Bass Strait , 38°59.1'S 148°31.6'E, 125 m, benthic sled, P.B. Berents, 27 August 1994, FRV Southern Surveyor , stn SS 05/94/60. 1 male, 3 females, NMV J13940 , 85 km NE of North Point , Flinders Island , eastern Bass Strait , 39°02.4'S 148°30.6'E, 120 m, muddy sand, R. Wilson, 15 November 1981, RV Tangaroa , stn BSS-169. 5 specimens, NMV J 13941 , 100 km NE of North Point , Flinders Island , eastern Bass Strait , 31°51.8'S 148°26.5'E, 130 m, fine sand, epibenthic sled, R. Wilson, 15 November 1981, RV Tangaroa , stn BSS-170S. 1 female, NMV J 7628, 100 km NE of North Point, Flinders Island , eastern Bass Strait , 31°51.8'S 148°26.5'E, 130 m, fine sand, grab, R. Wilson, 15 November 1981, RV Tangaroa , stn BSS-170G. 18 specimens, NMV J13942 , 38 km SW of Cape Paterson , central Bass Strait , 38°56.4'S 145°16.6'E, 70 m, fine sand, epibenthic sled, R.Wilson, 12 November 1981, RV Tangaroa , stn BSS-155S. 8 specimens, NMV J 13943 , 100 km SSE of Cape Liptrap , central Bass Strait , Australia, 39°45.9'S 145°33.5'E, 74 m, muddy fine sand, epibenthic sled, R. Wilson, 13 November 1981, RV Tangaroa , stn BSS-156S. 1 specimen NMV J13944 , 65 km ENE of Cape Rochon, Three Hummock Island, 40°10.9'S 145°44.3'E, 75 m, shell, bryozoans and mud, epibenthic sled, R. Wilson, 13 November 1981, RV Tangaroa , stn BSS-157S .

Type locality. 66 km south of Rodondo Island , central Bass Strait, Australia, 39°48.6'S 146°18.8'E, 82 m depth .

Description. Based on holotype female, 7.5 mm, NMV J13937 . Head much deeper than long, anterior margin with notch extended into a slit; rostrum present, anteriorly truncated; eye present, ventrally tapered. Antenna 1 peduncular article 1 not ball-shaped proximally, distal margin without a 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 with broad mid-anterior bulge (lateral view). Mandible lacinia mobilis a stemmed, distally-cusped blade; accessory setal row with intermediate setae; palp article 2 with 1 posterodistal seta, article 3 without A3-seta. Maxilliped outer plate with distal margin smooth, medial margin without notch.

Gnathopod 1 carpus subequal in length to propodus (0.9×); propodus, posterior margin without robust setae. Gnathopod 2 palm slightly acute, with no lateral robust setae, 3 medial robust setae. Pereopods 3 and 4 merus and

0.1 mm; remainder represent 0.2 mm.

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 long and slender. Pereopod 5 basis expanded posteriorly, rounded. 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 8 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 slightly cleft (about 28%).

Male (sexually dimorphic characters). Based on paratype male, 5.9 mm, NMV J13938 . Antenna 1 flagellum with callynophore. Antenna 2 flagellum with calceoli. Mandible palp article 2 with 10 posterodistal setae. Gnathopod 2 palm with 1 medial robust seta .

Etymology. The specific name is an Australian Aboriginal word meaning “beautiful”.

Remarks. Most species of Bamarooka ( B. bathycephala , B. dinjerra , B. endota and B. kimbla ) have ventrally tapered eyes. Bamarooka endota and B. dinjerra are very similar. They differ in the basis of pereopod 5, which is almost round in B. endota and has a sloped proximal posterior shoulder in B. dinjerra .

Although B. endota and B. bathycephala both occur in Bass Strait in similar depth range, the two species have not been taken in the same samples. Bamarooka bathycephala is found most often on clean sand bottoms whereas B. endota is most often found on muddy sand.

Habitat. Bamarooka endota occurs on fine and coarse sediments.

Distribution. Southeastern Australia, from central NSW to Bass Strait; 40–175 m depth.