Prachynella oculata Lowry &amp; Stoddart 2012, sp. nov.
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Pakynidae
Prachynella
Prachynella oculata

description: <i>Prachynella oculata</i> sp. nov. (Fig. 35) <i>Prachynella lodo.</i> — J.L. Barnard, 1964: 233, fig. 7 (in part, not the designated holotype). &amp;horbar;J.L. Barnard, 1966a: 70 (in part). &amp;horbar;J.L. Barnard, 1966b: 26 (in part). &amp;horbar;J.L. Barnard, 1967: fig. 29 and possibly figs 30h–k. <b>Type material.</b> HOLOTYPE, female, 6.2 mm, LACM, 9 miles, 185° T. from Point Loma Light, California, USA, 32°31'0''N 117°15'20''W, red sand, 14 August 1957, <i>Velero IV</i> stn 5193 (specimen illustrated in J.L. Barnard, 1964: fig. 7 and J.L. Barnard, 1967: fig. 29 as <i>P. lodo</i>). PARATYPE, male, 4.5 mm, LACM, 10 miles south of Point Loma, southern California, USA, 32°30'00"N 117°13'15"W, 41 m, coarse red (rust-coloured) sand, 26 March 1957, <i>Velero IV</i> stn 4910. <b>Additional material examined.</b> (all previously identified by J.L. Barnard as <i>P. lodo</i>). 1 specimen, LACM, 6 miles, 278 ° T. from Hyperion Stack, California, USA, 33°56'37''N 118°33'2''W, Hayward grab, 08:50–08:57 hrs, 20 June 1956, <i>Velero IV</i> stn 4318; 1 specimen, LACM, 2.7 miles, 319 ° T. from Point Loma Light, California, USA, 32°42'0''N 117°16'30''W, medium to coarse shelly sand, Hayward grab, 09:52–10:19 hrs, 8 December 1956, <i>Velero IV</i> stn 4755; 2 specimens, LACM, 4 miles, 148 ° T. from Santa Barbara Point Light, California, USA, 34°20'20''N 119°40'40''W, 68 m, green medium sand, Hayward grab, 09:49–10:06 hrs, 3 July 1957, <i>Velero IV</i> stn 5168; 1 specimen, LACM, 7.8 miles, 158 ° T. from Point Loma Light, California, USA, 32°32'45''N 117°11'0''W, medium gray sand, 10:21–10:47 hrs, 14 August 1957, <i>Velero IV</i> stn 5189; 1 specimen, LACM, 7.45 miles, 156.5 ° T. from Point Loma Light, California, USA, 32°33'10''N 117°10'57"W, medium gray sand, 09:48–10:00 hrs, 18 February 1958, <i>Velero IV</i> stn 5606; 1 specimen, LACM, 4.55 miles, 273 ° T. from Hyperion Stack, Santa Monica Bay, California, USA, 33°55'54''N 118°31'16''W, 57 m, dark olive green silty sand, 10:45–10:56 hrs, 18 April 1958, <i>Velero IV</i> stn 5711; 1 specimen, LACM, 4.4 miles, 312 ° T. from Point Pinos Light, Monterey Bay, California, USA, 36°40'56'' 122°0'0'', Hayward grab, glauconitic sand, 10:20–10:28 hrs, 10 February 1959, <i>Velero IV</i> stn 6471. <b>Type locality.</b> 9 miles, 185° T. from Point Loma Light, California, USA, 32°31'0''N 117°15'20''W. <b>Etymology.</b> Named for J.L. Barnard’s description of the material as “the oculate form”. <b>Diagnostic description.</b> <i>Head</i> lateral cephalic lobe large, broadly rounded; ventral margin curved. <i>Antenna 1</i> peduncular article 1 with posterodistal spine; accessory flagellum 2-articulate, article 1 short; flagellum with strong 1-field callynophore in female and male. <i>Mandible</i> lacinia mobilis a simple robust seta; accessory setal row present on both sides, not on raised setose ridge; <b>molar absent</b>; palp attached distally; palp article 2 broad, as long as article 3; article 3 with subparallel margins. <b> <i>Maxilla 1</i> outer plate with 10 setal-teeth</b> in 7/3 arrangement, outer row setal-teeth with medial cusps. <i>Maxilliped</i> inner plate small; outer plate large; palp 3-articulate (articles 1 and 2 fused). <i>Gnathopod 1</i> chelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 1.8 × breadth, posterior margin well developed, palm with produced corner, <b>pollex length about 1.6 × breadth</b>, corner of palm with complex robust seta; dactylus reaching to corner of palm. <b> <i>Gnathopod 2</i> palm minute,</b> obtuse. <i>Pereonite 4</i> without dorsal spines. <b> <i>Pereonite 5</i> with 1 rounded dorsal spine</b> . <i>Pereopod 5</i> basis subovate; merus with posteroproximal shoulder. <i>Pereopod 6</i> basis with posteroventral lobe produced beyond ischium; <b>merus</b> longer than broad, <b>with posteroproximal shoulder</b>. <i>Pereopod 7</i> basis subrectangular with posterior margin weakly dentate. <i>Oostegites</i> from gnathopod 2 to pereopod 5. <i>Epimeron 3</i> posterior margin without projections, posteroventral corner broadly rounded. <i>Uropod 3</i> biramous, inner ramus extending more than halfway along outer ramus but not reaching base of article 2. <i>Telson</i> shorter than broad, entire. <b>Remarks.</b> See remarks under <i>P. lodo</i>. Although not shown in J.L. Barnard’s figures, the palm of gnathopod 1 is defined by a complex robust seta. <b>Distribution.</b> Southern California, USA, eastern North Pacific Ocean; 40–140 m depth.
description: Published as part of <i>Lowry, J. K. &amp; Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, pp. 1-69 in Zootaxa 3246 (1)</i> on pages 51-52, DOI: 10.11646/zootaxa.3246.1.1, http://zenodo.org/record/5249007
description: {"references": ["Barnard, J. L. (1964) Los anfipodos bentonicos marinos de la costa occidental de Baja California. Revista de la Sociedad Mexicana de Historia Natural, 4, 205 - 273.", "Barnard, J. L. (1966 a) Submarine canyons of southern California. Part V. Systematics: Amphipoda. Allan Hancock Pacific Expeditions, 27 (5), 1 - 166.", "Barnard, J. L. (1966 b) Benthic Amphipoda of Monterey Bay, California. Proceedings of the United States National Museum, 119, 1 - 41.", "Barnard, J. L. (1967) Bathyal and abyssal gammaridean Amphipoda of Cedros Trench, Baja California. United States National Museum Bulletin, 260, 1 - 205."]}