Kapalana durraween Berents &amp; Lowry 2018, sp. nov.
Creators: name: Berents, Penelope B.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ischyroceridae
Kapalana
Kapalana durraween

description: <i>Kapalana durraween</i> sp. nov. Figs 4–6 <b>Holotype</b>, male, 9.4 mm, AM P.21868, off Disaster BaY, New South Wales, Australia (37°16'S 150°5'E), 91 m, K. Moller, May 1930. <b>Paratypes</b>: 1 male, 6.9 mm, AM P.10721, off Twofold Bay, New South Wales, Australia (37°5'S 150°9'E), 82 m, K. Moller on <i>Durraween</i>, August 1929; 1 male, 8.2 mm, AM P.76108; 1 female, 7.0 mm, AM P.76109; 4 males, 1 female, AM P.10719, off Twofold BaY, New South Wales, Australia (37°5'S 150°7'E), 82 m, K. Moller on <i>Durraween</i>, July 1929. <b>Additional material examined</b>. 10 specimens, AM P.21867, 35 km east of Port Jackson, New South Wales, Australia (33°50'S 151°40'E), 366 m, 27 March 1905; 1 female, AM P.10720, west-south-west of Gabo Island, Victoria, Australia (37°34'S 149°55'E), 128 m, K. Moller on <i>Durraween</i>, December 1929; 1 female, 2 juveniles, AM P.76107, off Disaster Bay, New South Wales, Australia (37°16'S 150°5'E), 91 m K. Moller, May 1930. <b>Etymology</b>. Named for the trawler <i>Durraween</i>, whose Master, Captain K. Moller, contributed many natural history specimens to the Australian Museum. Used as a noun in apposition. <b>Description</b>. Based on Holotype, male 9.4 mm,AM P.21868. <b>Head</b>. Rostrum long, length 0.3 × head, evenly tapered, apically acute; lateral cephalic lobe with ventral corner rounded, subocular margin deeply recessed, reaching beyond eye, anteroventral corner rounded, ventral margin horizontal, posterior margin sloping. <i>Antenna 1</i> very long, length 0.8 × body length; peduncle with scales; peduncular article 1 shorter than article 3, length 0.7 × peduncular article 3, not produced anterodistally and anteromedially, with strong sub-quadrate projection along posterior margin, posterodistal corner not produced; peduncular article 2 anterodistal corner with distal projection flagellum10-articulate; article 1 short. <i>Antenna 2</i> length equal to antenna 1; flagellum 9-articulate. <i>Epistome and upper lip</i> fused, produced, broad base, apically acute. <b>Pereon</b>. <i>Pereonite 1</i> with lateral keel, without sternal keel. <i>Pereonites 2–3</i> with sternal keel. <i>Pereonite 5</i> length 1.4 × depth. <i>Gnathopod 1</i> subchelate; coxa not fused to pereonite 1, without anteroventral lobe; basis length 2.1 × depth; carpus broad, length 1.5 × depth with setose posterior lobe, propodus palm acute, robust setae absent. <i>Gnathopod 2</i> carpochelate; coxa not fused to pereonite 2, length 1.6 × depth, without anteroventral lobe or cusp; basis short, broad, length 1.4 × breadth, basis without anteroproximal group of long slender setae, basis without anteroproximal bulge; carpus long, length 1.2 × breadth, broad, palm shallowly excavate, anterodistal tooth large, located near articulation with propodus, posterodistal tooth well defined, medium length, length 1.2 × width; propodus broad, curved, length 4.5 × width, without tooth on posterior margin, posterodistal corner smooth, without spines; dactylus length 0.4 × propodus. <i>Pereopod 3</i> coxa not fused to pereonite 3, with broad anteroventral lobe, length 1.9 × depth; basis, length 1.9 × breadth, with proximal, subquadrate anterodorsal corner, with plumose setal group and simple setae along anterior margin, without denticles along anterior margin; ischium long, length 2 × breadth; merus length 1.1 × breadth; short; without ridges. <i>Pereopod 4</i> coxa not fused to pereonite 4, length 2.1 × depth, with anteroventral lobe; basis length 1.7 × breadth, with plumose setal group midway along anterior margin or with simple setae along entire anterior margin; ischium long, length 2.5 × breadth; merus long, length 1.4 × breadth. <i>Pereopod 5</i> coxa length 1.2 × depth, without patches of small setae, with setae along ventral margin few or absent; merus with anterior lobe extending beyond anterior margin of carpus, posterior lobe with 6 plumose setae; propodus with 4 setae along posterior margin; dactylus short, uncinate with 2 accessory hooks. <i>Pereopod 6</i> coxa with setal fringe ventrally, without patches of small setae near margins; basis without patch of small setae near anterior margin; merus length 1.6 × breadth; dactylus short, uncinate, with 2 accessory hooks. <i>Pereopod 7</i> coxa without posterodorsal lobe; merus length 2.1 × breadth; dactylus short, uncinate, with 2 accessory hooks. <b>Pleon</b>. <i>Pleopods 1–3</i> biramous, decreasing in size anteroposteriorly. <i>Pleopod 1</i> inner ramus 9-articulate; outer ramus 9-articulate, article 1 evenly swollen. <i>Pleopod 2</i> inner ramus reduced, 1-articulate; outer ramus, broad, 1-articulate. <i>Pleopod 3</i> inner ramus reduced, 1-articulate; outer ramus broad, 1-articulate. <i>Uropod 1</i> biramous; peduncle, length 1.4 × outer ramus; rami with distoventral fan of robust setae; outer ramus with lateral row of denticles, without medial setae, with 14 lateral setae, with large apical robust seta and smaller slender setae; inner ramus length 0.5 × outer ramus, with 1 medial, and 3 lateral setae, without large apical robust seta. <i>Uropod 2</i> uniramous, peduncle, length 2.8 × breadth, 4.4 × length of ramus; ramus small with 7 denticles and 1 slender apical seta. <i>Uropod 3</i> uniramous, peduncle length 1.5 × breadth; ramus with 2 curved hooks. <i>Telson</i> length 0.6 × breadth, moderately cleft (58%), each lobe with 26–30 anteriorly directed hooks in 2 rows. <b>Female</b> (sexually dimorphic characters). Based on paratype female 7.0 mm, AM P.76109. <i>Antenna 1</i> flagellum 9-articulate. <i>Pereonite 1</i> without lateral keel. <i>Pereonites 2–3</i> without sternal keel. <i>Pereonite 5,</i> length 1.9 × depth. <i>Gnathopod 1</i> coxa, length 1.1 × depth; basis, length 2 × depth; carpus length 1.3 × depth with setose posterior lobe. <i>Gnathopod 2</i> subchelate; coxa, length 1.7 × depth; basis, length 2.2 × breadth. <i>Pereopod 5,</i> coxa, length 1.4 × depth. <i>Oostegites</i> from gnathopod 2 to pereopod 5. <b>Tube</b>. Tubes of juveniles attached in a ring, circling the tube of adult female. <b>Habitat</b>. Continental shelf and slope (82–366 m depth). <b>Remarks</b>. The shape of gnathopod 2 propodus and carpus changes as males grow, with the carpus becoming longer than wide and the propodus becoming curved and slender in large males. In males less than 7 mm, the length and breadth of the carpus are equal and the propodus is less than three times as long as wide Three species, <i>K. amelga</i>, <i>K. durraween</i> and <i>K. maia</i>, have an evenly tapered rostrum. Neither <i>Kapalana durraween</i> nor <i>K. maia</i> have a large apical seta on the inner ramus of uropod 1. <i>Kapalana durraween</i> differs from <i>K. maia</i> in having scales on the peduncle of antenna 1, a lateral keel on pereonite 1 and a sternal keel on pereonite 3. 35 km east of Port Jackson, New South Wales, Australia (diameter of central tube = 2mm). <b>Distribution</b>. Australia. <i>New South Wales</i>: east of Port Jackson; off Twofold BaY; off Disaster BaY. <i>Victoria</i>: west south west of Gabo Island.
description: Published as part of <i>Berents, Penelope B. &amp; Lowry, J. K., 2018, The New Crustacean Amphipod Genus Kapalana from Australian Waters (Senticaudata, Ischyroceridae, Ischyrocerinae, Cerapodini), pp. 391-421 in Records of the Australian Museum 70 (4)</i> on pages 397-398, DOI: 10.3853/j.2201-4349.70.2018.1711, http://zenodo.org/record/5237503