Bamarooka bathycephala (Stebbing)

Lowry, J. K. & Stoddart, H. E., 2002, The Amaryllididae of Australia (Crustacea: Amphipoda: Lysianassoidea), Records of the Australian Museum 54, pp. 129-214: 179-182

publication ID

2201-4349

persistent identifier

http://treatment.plazi.org/id/783187C3-FFF7-FFA8-18AF-F1109329FCFB

treatment provided by

Felipe

scientific name

Bamarooka bathycephala (Stebbing)
status

 

Bamarooka bathycephala (Stebbing)  

Figs. 45–47

Amaryllis bathycephalus Stebbing, 1888: 699   , pl. 27. Amaryllis bathycephala   .– Stebbing, 1906: 24.– Stebbing, 1910a:

633 (list).– Sheard, 1937: 18 (list).–Thurston & Allen, 1969:

354. Amaryllis macrophthalmus   .– Della Valle, 1893: 781 (in part).

Material examined. NEW SOUTH WALES: 1 specimen, AM P58124 View Materials , between Lion Island and Barrenjoey Head, Broken Bay , [approx. 33°33'S 151°22'E] GoogleMaps   , 25 m, SPCC /UTS, 8 October 1991   . 1 specimen, AM P24058 View Materials , E of Burwood Beach , 32°58'S 151°45'E GoogleMaps   , 28 m, mud and gravel, shipek grab, 18 December 1975, HDWBS stn 06010304   . 1 specimen, AM P58754 View Materials   , Cape Banks , 34°00'S 151°16'E GoogleMaps   , 45–50 m, The Ecology Lab, January 1991. 1 specimen, P58755 View Materials , SE of Bate Bay , 34°5.9'S 151°12'E GoogleMaps   , 35–40 m, The Ecology Lab, January 1991, stn S2 T4   . 1 specimen, AM P58756 View Materials , same locality   , 35–40 m, The Ecology Lab, July 1990, stn S3 T2   . 3 specimens, AM P58757 View Materials , same locality   , 35–40 m, The Ecology Lab, January 1991, stn S3 T4   . 1 specimen, AM P46444 View Materials , Bass Point , 34°36'S 150°54'E GoogleMaps   , 35–40 m, The Ecology Lab, 1 February 1990, stn S1 R3   . 1 specimen, AM P58758 View Materials   , same locality, The Ecology Lab, November 1990, stn S1 T3   . 1 specimen, AM P52920 View Materials , Wattamolla , 34°08'S 151°08.5'E GoogleMaps   ,

45–50 m, The Ecology Lab, June 1990, stn S2 R4. B ASS STRAIT: 9 specimens, NMV J2310 View Materials , 42 View Materials km SW of Babel Island, Tasmania, eastern Bass Strait , 40°13.8'S 148°39.6'E GoogleMaps   , 60 m, muddy sand, epibenthic sled, R. Wilson, 14 November 1981, RV Tangaroa   , stn BSS-165. 1 specimen, NMV J13928 View Materials , 32 View Materials km SSW of Cape Otway, western Bass Strait , 39°09'S 143°26'E GoogleMaps   , 85 m, coarse carbonate sand, G.C.B. Poore, 8 October 1980, HMAS Kimbla, cruise 80-K-1, stn BSS-55. 2 specimens, NMV J7450 View Materials , 31 View Materials km SSW of Cape Otway, western Bass Strait , 39°08'S 143°24'E GoogleMaps   , 77 m, medium sand, grab, G.C.B. Poore, 8 October 1980, HMAS Kimbla, stn BSS-56G. 1 specimen, NMV J7452 View Materials , 35 View Materials km SSW of Cape Otway, Victoria, western Bass Strait , 39°06'S 143°21'E GoogleMaps   , 59 m, coarse sand, dredge, G.C.B. Poore, 8 October 1980, HMAS Kimbla, stn BSS-57D. 1 specimen, NMV J13929 View Materials , 42 View Materials km NW of Cape Farewell, King Island, western Bass Strait , 39°19'S 143°38'E GoogleMaps   , 95 m, coarse sand, carbonate, G.C.B. Poore, 10 October 1980, HMAS Kimbla, cruise 80-K-1, stn BSS 76. 10 specimens, NMV J13930 View Materials , 6 View Materials km NE of Stanley, Tasmania, central Bass Strait , 40°48.8'S 145°22'E GoogleMaps   , 22 m, fine sand, M. Gomon & G.C.B. Poore, 4 November 1980, FRV Sarda   , stn BSS 114. 9 specimens, NMV J2309 View Materials , 25 View Materials km S of Cape Otway, Victoria, western Bass Strait , 39°06'S 143°35.8'E GoogleMaps   , 95 m, fine sand, dredge, M. Gomon et al., 31 January 1981, FRV Hai Kung, stn BSS-118D. 53 specimens, NMV J13931 View Materials ; 30 specimens, AM P36889 View Materials ; 26 km SW of Cape Otway, Victoria, western Bass Strait , 39°01'S 143°22'E GoogleMaps   , 84 m, medium sand, epibenthic sled, M. Gomon et al., 31 January 1981, FRV Hai Kung, stn BSS-120. 5 specimens, NMV J13932 View Materials , 31 View Materials km S of Cape Otway, Victoria, western Bass Strait , 39°01.0'S 143°15.2'E GoogleMaps   , 84 m, medium sand, epibenthic sled, M. Gomon et al., 31 January 1981, FRV Hai Kung, stn BSS-121. 2 specimens, NMV J48798 View Materials , 94 View Materials km N of North Point, Flinders Island, eastern Bass Strait , 38°53.7'S 147°55.2'E GoogleMaps   , 71 m, medium sand, epibenthic sled, R. Wilson, 17 November 1981, RV Tangaroa   , stn BSS 171S. 8 specimens, NMV J3769 View Materials , 25 View Materials km S of Aireys Inlet, Victoria, central Bass Strait , 38°44.6'S 144°09.0'E GoogleMaps   , 77 m, fine sand, epibenthic sled, R. Wilson, 19 November 1981, RV Tangaroa   , stn BSS-182. 1 specimen, NMV J3772 View Materials , 15 View Materials km SW of Point Reginald, Victoria, western Bass Strait , 38°50.0'S 143°07.5'E GoogleMaps   , 69 m, fine sand, grab, R. Wilson, 20 November 1981, RV Tangaroa   , stn BSS-186. 2 specimens, NMV J13933 View Materials , 70 View Materials km SW of Cape Otway, Victoria, western Bass Strait , 39°26.3'S 143°06.8'E GoogleMaps   , 115 m, sand, epibenthic sled, R. Wilson, 21 November 1981, RV Tangaroa   , stn BSS-194. 6 specimens, NMV J13934 View Materials , 65 View Materials km S of Cape Schanck, Victoria, central Bass Strait , 39°08.3'S 144°43.9'E GoogleMaps   , 66 m, coarse sand, R. Wilson, 23 November 1981, RV Tangaroa   , stn BSS-201   .

Type locality. Off mouth of Port Phillip Bay, Bass Strait, Australia, 38°22.5'S 144°36.5'E, 60 m depth GoogleMaps   .

Description. Based on female, 11 mm, AM P36889 View Materials . Head much deeper than long, anterior margin with notch extended into a slit; rostrum present, anteriorly rounded; eye present, ventrally tapered. Antenna 1 peduncular article 1 not ballshaped 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 with broad midanterior bulge (lateral view). Mandible lacinia mobilis a stemmed, distally-cusped blade; accessory setal row with intermediate setae; palp article 2 with 4 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 acute, with 3 lateral robust setae, 6 medial robust setae. 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 long and slender. Pereopod 5 basis expanded posterodistally (pear-shaped). Pereopod 7 basis subrectangular, posteroventral corner rounded, posteroventral margin straight.

Epimeron 3 posterior margin smooth, with notch well above rounded posteroventral corner. Uropod 1 peduncle dorsolateral margin with 11 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 20%).

Male (sexually dimorphic characters). Based on male, 7.2 mm, AM P36889 View Materials . Antenna 1 flagellum with callynophore. Antenna 2 flagellum with calceoli. Gnathopod 2 palm without lateral robust setae, with 2 medial robust setae.

Variation. This species shows considerable variation in the robust-setae formula of gnathopod 2 palm. This variation is correlated with the size and/or sex of specimens. For males the range is from 0/1 through 0/2 to 1/2; for females the known range is from 1/4 through 2/4, 4/4 to 4/5. Stebbing (1888: 701) recorded “a row of three short stout spines [= robust setae]… on one side and one or two more on the other”.

An 8.3 mm ovigerous female from east of Burwood Beach, NSW, differs slightly from the Bass Strait population in that the rostrum is slightly less produced, the eye is not quite so tapered and the basis of pereopod 5 is slightly broader distally.

Remarks. Most species of Bamarooka   ( B. bathycephala   , B. dinjerra   , B. endota   and B. kimbla   ) have ventrally tapered eyes. Bamarooka bathycephala   differs from all of these species in the basis of pereopod 5, which is pear-shaped.

Habitat. Bamarooka bathycephala   has been collected frequently on sandy sediments and occasionally on mud.

Distribution. Southeastern Australia, from Sydney to Bass Strait; 22–115 m depth.

AM

Australian Museum

NMV

Museum Victoria

R

Departamento de Geologia, Universidad de Chile

RV

Collection of Leptospira Strains

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Amaryllididae

Genus

Bamarooka

Loc

Bamarooka bathycephala (Stebbing)

Lowry, J. K. & Stoddart, H. E. 2002
2002
Loc

Amaryllis bathycephalus

Stebbing, T 1906: 24
1906