Endevoura mirabilis Chilton, 1921

Lowry, James K. & Hughes, Lauren E., 2015, Endevouridae, a review with description of four new species (Crustacea, Amphipoda, Lysianassoidea), Zootaxa 4018 (1), pp. 1-34 : 8-10

Endevoura mirabilis Chilton, 1921

( Fig. 7 )

Endevoura mirabilis Chilton, 1921: 44 , figs 4a–q.— Sheard, 1937: 19.— J.L. Barnard, 1958: 91.— Barnard & Karaman, 1991: 484.— Springthorpe & Lowry, 1994: 25.

Endeavoura (sic) mirabilis .— Poore et al., 1975: 34 (list), 67 (appendix 4).

not Endevoura mirabilis .— Nagata, 1965: 146, figs 2, 3.— Ishimaru, 1994: 57 (= Endevoura sp.).

Type material. Syntypes: 1 specimen (sex indeterminate), whole animal slide mount (by Chilton), E4845; 1 ‘A’ specimen (sex indeterminate), dissected (by Chilton), 3 slides, E6519; 1 ‘B’ specimen (sex indeterminate), dissected (by Chilton), 3 slides, E6519; 1 ovigerous female (5 eggs, without oostegites), 5 mm, dissected, 4 slides, AM P.69257, east coast of Flinders Island, Bass Strait, Tasmania (40°00'S, 148°30'E), FIS “ Endeavour ” Expedition 1909−1914; 1 male, 4.5 mm, dissected, 4 slides, AM P.69258; syntype female, partially dissected, 2 slides, AM P.69256, same data as type locality; 1 specimen, partially dissected, 1 slide, AM P.69259; 1 specimen, partially dissected, 1 slide, AM P.69260; 1 specimen, partially dissected, 1 slide, AM P.69261; 1 specimen, partially dissected, 1 slide, AM P.69262; 75 specimens, E6520; 1 specimen, AM P.5935, same data as holotype.

Type locality. East coast of Flinders Island, Bass Strait (approx. 40°S, 148°30'E).

Additional material examined. Eastern Australia: 1 specimen, AM P.57653, due east of Mooloolaba, Queensland (26°39'08"S, 153°18'53"E) 50 m, 3 July 1995 to 4 July 1995, baited trap, coll. J.K. Lowry & K. Dempsey, SEAS Project (QLD-1213); 5 specimens, sex indeterminate, AM P.57652, due east of Mooloolaba, Queensland (26°39'08"S, 153°18'53"E), 50 m, 2 July 1995 to 3 July 1995, baited trap, coll. J.K. Lowry & K. Dempsey, SEAS Project (QLD-1197); 1 specimen, AM P.57651, north-east of Coffs Harbour, New South Wales (30°15.75'S, 153°21.98'E), 98 m, baited trap, 1520–1115 hrs, 12–13 August 1993, coll. P. Berents, R.T. Springthorpe & W. Vader, “MV Cheryl Lee” (stn NSW- 885); 1 male, NMV J7650, 28 km south south-west of Marlo, Victoria (37°59.0’S, 148°27.0’E), 51 m, muddy sand and fine shell, 30 July 1983, coll. M.F. Gomon & R. Wilson, “FV Silver Gull” (stn BSS-207); 1 male, NMV J68170 , 40 km south-south-west of Lakes Entrance, Victoria (38°18.0'S, 147°37.0'E), 55 m, muddy fine shell, epibenthic sled, 31 July 1983, coll. M.F. Gomon & R. Wilson, “FV Silver Gull” (stn BSS-209S); 2?males, NMV J1133, Port Phillip Bay, Victoria (37°57.5'S, 144°51.5'E), 18 m, silty sand, Smith-McIntyre grab, 3 December 1970 (stn PPBES-909); 1 male, NMV J1132, Western Port, Victoria (38°25.45’S, 145°15.03’E), 14 m, sand, Smith-McIntyre grab, 25 November 1973, coll. Marine Studies Group, Ministry for Conservation, Victoria, (stn WBES-17499); 1?male, NMV J1131,Western Port, Victoria (38°25.83'S, 145°19.28'E), 8 m, sand, Smith-McIntyre grab, 21 November 1973, coll. Marine Studies Group, Ministry for Conservation, Victoria, (stn WBES-1731); 6 specimens, NMV J22343 , 11.7 km west of Point Ricardo, Victoria (37°49.89'S, 148°30.13'E), 27 m, coarse sand, Smith-McIntyre grab, 4 June 1991, coll. N. Coleman (stn MSL-EG 77); 1 juvenile, NMV J2401, 28 km east of Cape Farewell, King Island, central Bass Strait (39°32.8'S, 144°16'E), 18 m, fine sand, epibenthic sled, 1 November 1980, coll. M.F. Gomon & G.C.B. Poore, FRV Sarda (stn BSS-107S); 1 female, NMV J2400, 35 km east of Cape Farewell, King Island, central Bass Strait (39°32.8'S, 144°21'E), 27 m, fine sand, epibenthic sled, 1 November 1980, coll. M.F. Gomon & G.C.B. Poore, “FRV Sarda ” (stn BSS-108S); 1 juvenile, NMV J68172 , 23 km east of Cape Rochon, Three Hummock Island, central Bass Strait (40°22.2'S, 145°17'E), 40 m, sand, epibenthic sled, 3 November 1980,coll. M.F. Gomon & G.C.B. Poore, “FRV Sarda ” (stn BSS- 112S); 1 female, NMV J68173 , 39 km north north-east of Eddystone Point, eastern Bass Strait (40°43.9'S, 148°37.5'E to 40°43.8'S, 148°38.6'E), 70 m, mud, otter trawl, 7 February 1981, coll. M.F. Gomon, G.C.B. Poore & C.C. Lu, “FRV Hai Kung” (stn BSS-140T); 2?males, NMV J 11288 , 100 km south-south-east of Cape Liptrap, central Bass Strait (39°45.9'S, 145°33.5'E), 74 m, muddy fine sand, epibenthic sled, 13 November 1981, coll. R. Wilson, “RV Tangaroa ” (stn BSS-156S); 1?male, NMV J68174 , 24 km north-north-east of Eddystone Point, eastern Bass Strait (40°43.9'S, 148°32.5'E), 56 m, muddy sand, Smith-McIntyre grab, 14 November 1981, coll. R. Wilson, “RV Tangaroa ” (stn BSS-163); 1 male, AM P.69119, off Babel Island, Tasmania (39°55'S, 148°31'E), 25 m, horizontal plankton haul, N200 net, 20 January 1939, “FRV Warreen” ( CSIRO stn 29/39).

South Australia: 30 specimens, SAMA 8495, Marion Bay, Yorke Peninsula (approx. 35°14'S, 137°00’E), 3 m, on dead crayfish in pot, 3 January 1977, coll. W. Zeidler (stn SAM-1); 1?male, SAMA 8496 Marion Bay, Yorke Peninsula (approx. 35°14'S, 137°00’E), 6 m, on fish used as crayfish bait, 30 December 1975, coll. W. Zeidler (stn SAM-3); 8 specimens, SAMA 8497, Marion Bay, Yorke Peninsula (approx. 35°14’S, 137°00’E), 15 m, on bait in craypots, 28 January 1980, coll. W. Zeidler (stn SAM-35); 13 specimens, NMV J68175 , West Ground, 2.3 nautical miles west of Tiparra Light, Tiparra Reef, Tiparra Bay (34°10'S, 137°23'E), 10 m, ascidians with red and green algae, 15 March 1985, coll. G.C.B. Poore & H.M. Lew Ton, (stn NMV SA- 11); 1 specimen, NMV J68176 , coral reef, Tiparra Reef, Tiparra Bay (34°10'S, 137°23'E), 5 m, ascidians with encrusting algae, 15 March 1985, coll. G.C.B. Poore & H.M. Lew Ton, (stn NMV SA- 14); 9 specimens, NMV J68177 , Tiparra Bay, South Australia (34°10'S, 137°23'E), 11 m, algae on sponges and ascidians, 15 March 1985, coll. G.C.B. Poore & H.M. Lew Ton (stn NMV SA- 18); 1 male dissected, 5 slides, AM P.69280, behind Lowly Point, Spencer Gulf (approx. 33°00'S 137°46'E), 18 m, 7 March 1938, coll. K. Sheard, “F.L. Whyalla” (stn SA- 77); 1 female dissected, 5 slides, AM P.69279, behind Lowly Point, Spencer Gulf (approx. 33°00'S, 137°46'E), 18 m, 7 March 1938, coll. K. Sheard, “F.L. Whyalla” (stn SA- 77); 9 specimens (including 3 ovigerous females, 2 males), AM P.69120, behind Lowly Point, Spencer Gulf (approx. 33°00'S, 137°46'E), 18 m, 7 March 1938, coll. K. Sheard, “F.L. Whyalla” (stn SA- 77); 1?male, AM P.69263, 9 km north-west of 5th Creek, Port Pirie, Spencer Gulf, South Australia (33°12'S, 137°55'E), 13.4 m, seagrass, March 1980, coll. P.A. Hutchings & T. Ward, Spencer Gulf Seagrass Survey (801 B6/3).

Diagnosis. Head lateral cephalic lobe subacute. Maxilla 1 palp with 9 robust setae and 1 slender seta. Maxilliped inner plate with 6 apical robust setae; outer plate with 8 embedded robust setae and 1 submarginal slender setae. Gnathopod 1 basis anterior margin cuspidate. Pereopod 3 propodus length 1.9 × width, posteroproximal margin not produced, palm obtuse, margin convex. Epimeron 3 posteroventral corner subquadrate. Uropod 3 inner ramus subequal to article 1 of outer ramus; outer ramus 2 articulate, article 2 length 1.5 × width. Telson as long as broad, length 0.9 × width.

Description of syntype female (AM P.69257). Head lateral cephalic lobe subacute, anteroventral margin concave. Antenna 1 peduncular article 3 hidden in medial view, accessory flagellum 4-articulate; primary flagellum 7-articulate. Antenna 2 flagellum 3-articulare. Mandible incisor convex, margin smooth; palp attached proximally; palp article 2 length 1.5 × article 3. Maxilla 1 inner plate with 1 apical plumose seta; outer plate with 10 setal-teeth; palp with 9 robust setae and 1 slender seta across distal margin and extending down subapical medial margin. Maxilla 2 inner plate subtriangular, smaller than outer plate; outer plate subrectangular. Maxilliped inner plate with 6 apical robust setae; outer plate with 8 embedded robust setae and 1 submarginal slender setae; palp article 4 spatulate.

Coxae 1–3 ventral margin with sparse fine setae. Gnathopod 1 simple; basis anterior margin smooth; carpus length 1.1 × width, 1.7 × propodus length; dactylus posterior margin smooth. Gnathopod 2 minutely chelate. Pereopod 3 chelate; merus length 1.1 × width, subequal to carpus length; carpus subrectangular, posterior margin as long as free proximal margin of propodus, posteroproximal margin not produced; propodus length 1.9 × width, posteroproximal margin not produced, palm obtuse, margin convex. Pereopods 5–6 basis posterior margin expanded; merus posterior margin expanded. Pereopod 7 basis posterior margin excavate distally.

Epimeron 1 posteroventral corner rounded. Epimera 2–3 posteroventral corner subquadrate. Uropod 1 with 4 lateral and 2 apical robust setae; inner ramus with 2 lateral robust setae; outer ramus with 1 lateral robust seta. Uropod 2 peduncle with 1 lateral and 2 apical robust setae; outer ramus with 2 lateral robust setae; inner ramus with 1 lateral robust seta. Uropod 3 peduncle without robust setae; inner ramus subequal to article 1 of outer ramus; outer ramus 2 articulate, article 2 length 1.5 × width. Telson as long as broad, length 0.9 × width.

Male sexually dimorphic characters. Pereopod 3 carpus posterior margin much shorter than free proximal margin of propodus; propodus posteroproximal margin produced into a lobe.

Distribution. Eastern Australia: Moolooloobah, Coffs Harbour, Western Port, Eddystone Point, Marlo, Lakes Entrance, Flinders Island, King Island, Cape Liptrap, Three Hummocks Island. South Australia: Pearson Island, Flinders Island, Tiparra Bay, Spencer Gulf, Yorke Peninsula.

Figures

FIGURE 7. Endevoura mirabilis Chilton, 1921, syntypes: female 5 mm, AM P. 69257; male, 4.5 mm, AM P. 69258, Flinders Island, Bass Strait, Tasmania. Scale: Md, Mx, Mxp, Ur and T, scales 0.1 mm; Gn and P, scales 0.5 m.