Amaryllis spencerensis Lowry &amp; Stoddart 2002, n.sp.
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Amaryllis
Amaryllis spencerensis

description: <i>Amaryllis spencerensis</i> n.sp. Figs. 38–40 <b>Type material</b>. HOLOTYPE, female, 16.0 mm, ovigerous (15 eggs), AM P 37096; 3 PARATYPES, female, AM P 37097; 19 km from Mount Young, toward Wallaroo, Spencer Gulf, South Australia, [approx. 33°18'S 137°31'E], 18 m, K. Sheard on FL <i>Whyalla</i>, 8 March 1938. 1 PARATYPE, male, 11.0 mm, AM P 37098, Western Shoal, Spencer Gulf, South Australia, [approx. 33°09'S 137°31'E], 9 m, K. Sheard on FL <i>Whyalla</i>, 10 March 1938. 2 PARATYPES, female, SAMA C5987, Dangerous Reef, Spencer Gulf, South Australia, [approx. 34°49'S 136°12'E], dredged, K. Sheard. <b>Additional material</b>. Three females, AM P 37099, unknown locality in Spencer Gulf and/or Gulf St Vincent, South Australia. <b>Type locality</b>. 19 km from Mount Young, toward Wallaroo, Spencer Gulf, South Australia, [approx. 33°18'S 137°31'E], 18 m depth. <b>Description</b>. Based on holotype female, 16.0 mm, AM P37096. Head much deeper than long, anterior margin with notch extended into a slit; rostrum absent; eye present, elongate, reniform. <i>Antenna 1 peduncular article 1</i> not ballshaped proximally, <i>distal margin with well-developed medial spine</i>; peduncular article 2 medium length; <i>flagellum without callynophore</i>, calceoli absent. Antenna 2 flagellum about as long as that of antenna 1, without calceoli. Mouthpart bundle subconical. <i>Epistome/upper lip with strong mid-anterior angle (lateral view). Mandible lacinia mobilis a stemmed, distally-cusped blade; accessory setal row with intermediate setae; palp article 2 with 2 posterodistal setae</i>, article 3 without A3-seta. <i>Maxilliped outer plate with distal margin smooth</i>, medial margin without notch. <i>Gnathopod 1 carpus subequal in length to propodus (0.9×)</i>; propodus, posterior margin without robust setae. <i>Gnathopod 2 palm slightly acute, with 2 lateral robust setae, 1 medial robust seta</i>. 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. <i>Pereopod 7 basis subrectangular, posteroventral corner notched</i>, posteroventral margin straight. <i>Epimeron 3 posterior margin smooth</i>, with notch well above rounded posteroventral corner. <i>Uropod 1</i> peduncle Lowry &amp; Stoddart: Australian Amaryllididae (Amphipoda) 175 dorsolateral margin with 17 robust setae; <i>outer ramus without large spines between robust setae</i>. <i>Uropod 2 inner ramus slightly constricted</i>. Uropod 3 rami lanceolate; without plumose setae; outer ramus 1-articulate. <i>Telson moderately cleft (about 37%)</i>. <b>Male</b> (sexually dimorphic characters). Based on paratype male, 11 mm, AM P 37098. Antenna 1 flagellum with callynophore, with calceoli. Antenna 2 flagellum with calceoli. Mandible palp article 2 with 5 posterodistal setae. Gnathopod 2 palm with 1 lateral robust seta. <b>Etymology</b>. Named for the type locality, Spencer Gulf. <b>Remarks</b>. <i>Amaryllis spencerensis</i> belongs to a small group of species with a smooth posterior margin on epimeron 3 and a subrectangular basis on pereopod 7 (<i>A. macrophthalma, A. philatelica</i> and <i>A. spencerensis</i>). Within this group <i>A. macrophthalma</i> and <i>A. spencerensis</i> both have a welldeveloped medial spine on peduncular article 1 of antenna 1 and a notch above the rounded posteroventral corner on epimeron 3. In <i>A. spencerensis</i> the posteroventral corner of the basis of pereopod 7 is notched, in contrast to subquadrate in <i>A. macrophthalma</i>, and there are significantly less robust setae defining the palm of gnathopod 2 in the female. <b>Habitat</b>. Not known. <b>Distribution</b>. Known only from Spencer Gulf, South Australia; 9–18 m depth.
description: Published as part of <i>Lowry, J. K. &amp; Stoddart, H. E., 2002, The Amaryllididae of Australia (Crustacea: Amphipoda: Lysianassoidea), pp. 129-214 in Records of the Australian Museum 54</i> on pages 173-175