Amaryllis dianae, 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 : 143-146

Amaryllis dianae n.sp.

Figs. 11–13

Amaryllis macrophthalma .– Chilton, 1921: 55 (in part).

Type material. HOLOTYPE, female, 16.5 mm, AM P 37378, off South Mole, Arthur Head, Fremantle , Western Australia, eastern Indian Ocean , 32°03'S 115°44'E, 6 m, spirorbid worm tubes, J. K. Lowry , 25 December 1983, stn WA-283. 1 PARATYPE, female, AM P 37379, type locality, 6 m, orange gorgonian , R. T. Springthorpe, 25 December 1983, stn WA- 286. 2 PARATYPES, male, AM P 37380, Cathedral Rock, Rottnest Island , Western Australia, 32°01.5'S 115°27'E, 3 m, orange tunicates , J. K. Lowry , 21 December 1983, stn WA-247. 1 PARATYPE, AM P 37381, same locality, 3 m, coralline algae, some red algae and sponge , J. K. Lowry, 21 December 1983, stn WA-248. 1 PARATYPE, male, AM P 37382 and 3 PARATYPES, female, WAM C 28202, same locality, 6 m, mixed algae , R. T. Springthorpe, 21 December 1983, stn WA-251 .

Additional material. VICTORIA: 1 specimen, AM P 58122, Lawrence Rocks, Portland , 38°24'S 141°40.1'E, 23 m, bryozoan, possibly Orthoscuticella, R.T. Springthorpe & P.B. Berents , 30 April 1988 , stn VIC-49. SOUTH AUSTRALIA: 1 specimen, NMV J 48799 , NE end of West Island, Encounter Bay, 35°37'S 138°36'E, 15 m, red algae, sponges and bryozoans, G. C. B. Poore & H. M. Lew Ton , 20 March 1985 , NMV stn SA-42 . 1 specimen, AM P 37383, 8– 10 km off Semaphore, Gulf St Vincent , [approx. 34°52'S 138°20'E], 9 m, H. M. Hale, 1925 . 2 specimens AM P 37384, Marino, Gulf St Vincent , [approx. 35°03'S 138°31'E], W. H. Baker, 1910 . 2 specimens, SAMA C5974 , 20 km due W of Outer Harbour, Adelaide , [approx. 34°45'S 138°15'E], 23–25 m, quadrat G8 , J. McPhalain, 17 April 1975 . 2 specimens, SAMA C5975 , same locality, quadrat H4 , J. McPhalain , 22 April 1975 . 1 specimen, SAMA C5976 , same locality, quadrat G6 , J. McPhalain , 17 April 1975 . 1 specimen, SAMA C5977 , same locality, quadrat H7 , J. McPhalain , 22 April 1975 . 1 specimen, SAMA C5978 , Tiparra Reef, Spencer Gulf , S. A., [approx. 34°03'S 137°24'E], 5 m, in seagrass Posidonia, S.A. Shepherd . 2 specimens, SAMA C5979 , The Pages , [approx. 35°47'S 138°17'E], 27 m, dredged, K. Sheard, 12 April 1941 . 1 specimen, AM P 37385, Nepean Bay, Kangaroo Island , [approx. 35°42'S 137°37'E], F. Moorhouse, May 1938 . 1 specimen, AM P 37386, unknown locality, Gulf St Vincent . 2 specimens, AM P 37387, behind Lowly Point, Spencer Gulf , [approx. 33°00'S 137°46'E], 18 m, K. Sheard on FL Whyalla, 7 March 1938 . 1 specimen, AM P 37388, Western Shoal, Spencer Gulf , [approx. 33°09'S 137°31'E], 9 m, K. Sheard on FL Whyalla, 10 March 1938 . 1 specimen, NMV J 13982 , The Hotspot Reef , W of Flinders Island, 33°40.8'S 134°22.5'E, 21 m, erect hard bryozoan on vertical rock face, G. C. B. Poore, 20 April 1985 , NMV stn SA-71 . WESTERN AUSTRALIA: 1 specimen, AM P 18313, SW of Eucla, Great Australian Bight, 146–219 m, FIS Endeavour . 3 specimens, AM P 37389, 2 km SE of South Point, Two Peoples Bay , 34°58'S 118°12'E, 14 m, among green alga Caulerpa bases and fine sand, J. K. Lowry, 16 December 1983 , stn WA-178. 5 specimens, AM P 37390, rocks near Migo Island, Port Harding, Torbay Bay , 35°04'S 117°39'E, 6– 7 m, sponge and algae, R. T. Springthorpe, 15 December 1983 , stn WA- 145. 1 specimen, AM P 37391, Geographe Bay , [approx. 33°37'S 115°18'E], 27–29 m, J. C. Verco .

Type locality. Off South Mole, Arthur Head , Fremantle , Western Australia, eastern Indian Ocean , 32°03'S 115°44'E, 6 m depth .

Description. Based on holotype female, 16.5 mm, AM P37378. Head much deeper than long, anterior margin with notch extended into a slit; rostrum absent; eye present, elongate, reniform. 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 moderate midanterior angle with small depression above angle (lateral view). Mandible lacinia mobilis a stemmed, distally-cusped blade; accessory setal row with intermediate setae; palp article 2 with 3 posterodistal setae, article 3 without A3- seta. Maxilliped outer plate with distal margin smooth, medial margin without notch.

Gnathopod 1 carpus shorter than propodus; propodus, posterior margin without robust setae. Gnathopod 2 palm slightly acute, without lateral robust setae, 2–3 medial robust setae. Pereopods 3 and 4 merus and carpus without setal fringe. Pereopod 4 coxa with anterior and posterior margins subparallel, anteroventral corner rounded. Pereopods 5–7 with distal articles elongate, dactyls short and stocky. Pereopod 5 basis expanded posteriorly, rounded. Pereopod 7 basis subrectangular, posteroventral corner subquadrate, posteroventral margin straight.

Epimeron 3 posterior margin serrate, with notch well above rounded posteroventral corner. Uropod 1 peduncle dorsolateral margin with 17 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 41%).

Male (sexually dimorphic characters). Based on paratype male, 6.0 mm, AM P37380 (probably not fully mature). Antenna 1 flagellum with callynophore. Antenna 2 flagellum with calceoli. Gnathopod 2 palm with 1 lateral robust seta, without medial robust setae.

Etymology. Named for Diana Jones, carcinologist at the Western Australian Museum, in appreciation of her generous help with collections of Western Australian amphipods.

Remarks. Amaryllis dianae is most similar to other Amaryllis species with a serrate posterior margin on represent 0.5 mm.

epimeron 3, such as A. carrascoi , A. croca , A. keablei and A. migo . Amaryllis dianae , A. carrascoi and A. migo all have a notch above the posteroventral corner of epimeron 3; in A. croca and A. keablei the serrations extend to the posteroventral corner. The posteroventral corner of pereopod 7 is rounded in A. migo , subquadrate in A. dianae and subquadrate with a distinct notch in A. carrascoi .

Distribution. Southern and southwestern Australia; 3–219 m depth.