Hirondellea kapala, Lowry & Stoddart, 2010

Lowry, J. K. & Stoddart, H. E., 2010, The deep-sea scavenging genus Hirondellea (Crustacea: Amphipoda: Lysianassoidea: Hirondelleidae fam. nov.) in Australian waters, Zootaxa 2329 (1), pp. 37-55 : 49-52

Hirondellea kapala sp. nov.

( Figs 9–11 )

Type material. HOLOTYPE, male, 7.6 mm, AM P.68979, south-east of Broken Bay , New South Wales, Australia, 33°37’S, 152°04’E to 33°39’S, 152°02’E, 896–924 m, dredge, 10 December 1980, R. Springthorpe on RV Kapala , stn K80-20-09 . PARATYPES: 1 male, AM P.68980, type locality ; 1 female, ovigerous, AM P.68981, type locality ; 1 female, non-ovigerous, with setose oostegites, P.68984, type locality; 1 specimen, AM P.68983, east of Broken Bay , New South Wales, Australia, 33°30’S 152°09’E to 33°33’S 152°11’E, 922– 1015 m, dredge, 12 February 1986, RV Kapala , stn K-86-01-08 ; 6 specimens, AM P.68978, east of Broken Bay , New South Wales, Australia, 33°31’S 152°08’E to 33°33’S 152°07’E, 914 m, dredge, R. Springthorpe, 10 December 1980, RV Kapala , stn K-80-20-08 ; 3 specimens, AM P.68982, north-east of Port Jackson , New South Wales, Australia, 33°44’S 151°57’E, 820–889 m, beam trawl, 11 February 1986, RV Kapala , stn K-86- 01-07 .

Additional material. 6 specimens, AM P.49813, north-east of Coffs Harbour , New South Wales, Australia, 30°10.88'S 153°32.21'E, 1000 m, baited trap, 12–13 August 1993, 1030–0830 hrs, P. Berents, R. T . Springthorpe & W. Vader, MV Cheryl Lee , SEAS stn NSW-876. — 2 specimens, AM P.49833 and 2 specimens, AM P.56083, same data, SEAS stn NSW-877. — 21 specimens, AM P.43371, north-east of Coffs Harbour , New South Wales, Australia, 30°10.94'S, 153°32.27'E, 1000 m, baited trap, bottom temperature 7.4°C, 8–9 September 1994, J.K. Lowry & K. Dempsey, MV Carrie Anne , SEAS stn NSW-1000. — 2 specimens, AM P.48099, north-east of Coffs Harbour , New South Wales, Australia, 30°10.94'S 15332.27'E, 963 m, baited trap, set 1215 hrs, P. Berents, R. T . Springthorpe & W. Vader on MV Cheryl Lee , 11–12 August 1993, SEAS stn NSW-862. — 1 specimen, AM P.48118, same data, SEAS stn NSW-863. — 1 specimen, AM P.50072, north-east of Coffs Harbour , New South Wales, Australia, 30°10.94'S 153°32.27'E, 1000 m, baited trap, bottom temperature 7.4°C, 9–10 September 1994, J.K. Lowry & K. Dempsey on MV Carrie Annee , SEAS stn NSW-1021. — 77 specimens, AM P.44366, off Wollongong , New South Wales, Australia, 34°33.41'S, 151°21.35'E, 1000 m, baited trap, 6–7 May 1993, P. Freewater, S. Keable & W. Vader on MV Robin E, SEAS stn NSW-788. — 87 specimens, AM P.44375, same data, SEAS stn NSW-789. — 2 specimens, MV J60580 , south of Point Hicks , Victoria, Australia, 38°19.60'S 149°24.30'E, 930 m, rock, rubble, clay, sand, biogenic sediment, WHOI epibenthic sled, 23 July 1986, M.F. Gomon et al. on RV Franklin , stn SLOPE 33 . — 8 specimens, MV J60581 , off Freycinet Peninsula , Tasmania, Australia, 42°0.20'S 148°37.70'E, 720 m, coarse shelly sand, WHOI epibenthic sled, 27 July 1986, M.F. Gomon et al. on RV Franklin , stn SLOPE 46 . — 5 specimens, MV J60582 , off Freycinet Peninsula , Tasmania, Australia, 42°2.20'S, 148°38.70'E, 800 m, coarse shelly sand, WHOI epibenthic sled, 27 July 1986, M.F. Gomon et al. on RV Franklin , stn SLOPE 45 . — 1 specimen, AM P.51358, east of Fortescue Bay , Tasmania, Australia, 43°08.96'S 145°15.36'E, 1000 m, baited trap 1, 9–10 April 1994, J.K. Lowry & K. Dempsey on MV Martrudan , SEAS stn TAS-419. — 3 specimens, AM P.51390, same data, SEAS stn TAS-421. — 1 specimen, AM P.51384, same data, SEAS stn TAS-422. — 21 specimens, AM P.57980, same data, SEAS stn TAS-423.

Type locality. South-east of Broken Bay , New South Wales, Australia, 33°37’S 152°04’E to 33°39’S 152°02’E, 896–924 m depth.

Etymology. The specific name refers to the vessel, FRV Kapala , from which the collections of the type specimens were made; used as a noun in apposition.

Diagnosis. Head lobe broadly rounded. Epistome weakly produced, broadly rounded. Gnathopod 1 propodus palm slightly acute, straight; dactylus strongly over-reaching palm, with 1 subterminal spine on inner margin. Gnathopod 2 minutely subchelate; propodus length 1.8 × breadth. Epimeron 1 anteroventral corner rounded. Epimeron 3 posteroventral corner broadly rounded. Uropod 2 inner ramus incised. Uropod 3 outer ramus article 2 long, 0.3 × article 1. Telson length 1.4 × breadth, cleft 51 %.

Remarks. Hirondellea kapala is the only Australian species with a slightly acute palm on gnathopod 1, but other species in the genus, such as H. dubia Dahl, 1959 ; H. fidenter J.L. Barnard, 1966 ; H. gigas ( Birstein & Vinogradov, 1955) ; H. glutonis Barnard & Ingram, 1990 ; H. trioculata Chevreux, 1889 ; H. wolfendeni ( Tattersall, 1909) all have this character. Among these species only H. kapala , H. trioculata and H. wolfendeni have a straight margin on the palm. Hirondellea kapala and H. wolfendeni both have the gnathopod 1 dactylus strongly overlapping the palm. Gnathopod 2 is subchelate in H. kapala but minutely chelate in H. wolfendeni .

Distribution. South-eastern Australia in 720–1000 m depth.

Figures

FIGURE 9. Hirondellea kapala sp. nov. Holotype male, 7.6 mm, AM P.68979.

FIGURE 10. Hirondellea kapala sp. nov. Holotype male, 7.6 mm, AM P.68979. Scales represent 0.1 mm.

FIGURE 11. Hirondellea kapala sp. nov. Holotype male, 7.6 mm, AM P.68979. Scales represent 0.1 mm.