Iphiplateia marleneae Coleman & Lowry, 2012, sp. nov.
Creators: name: Coleman, Oliver
name: Lowry, James K.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Phliantidae
Iphiplateia
Iphiplateia marleneae

description: Iphiplateia marleneae sp. nov.
(Figs 1–4)
Type material. Holotype, ovigerous female (4 microscopic slides with parts of holotype), 6.4 mm, AM P.80304, inner lagoon, Ningaloo reef, Western Australia (21°53'8"S 113°59'26"E), brown alga, Lobophora sp., 1.5 m depth, leg. L.E. Hughes on SCUBA, 18 June 2008, MI WA-987, NR-18, C Reefs no. 3162. Paratypes from same station: AM P.80305, 4 females, 4 males, 1 juveniles, 1 damaged specimen; AM P.80306, 1 slide with total male paratype.
Type locality. Inner lagoon, Ningaloo reef, Western Australia (21°53'8"S 113°59'26"E), 1.5 m depth.
Additional material examined. 1 female, AM P.80316, southern side of Kendrew Island, Dampier Archipelago, Western Australia (-20.48306° 116.54222°), Sargassum sp. on sand, 4.4 m depth, leg. R.A. Peart, 30 August 1999, WA-693; 1 juvenile, AM P.80317, Tish Point, Rosemary Island, Dampier Archipelago, Western Australia (-20.4945° 116.59817°), Dictyopteris sp., intertidal zone, 0.5 m depth, leg. R.A. Peart, 30 August 1999, WA-687; 13 females, AM P.80307, inner lagoon, Ningaloo reef, Western Australia (21°53'9"S 113°59'26"E), brown algae, 2.6 m depth, leg. L.E. Hughes on SCUBA, 19 June 2008, MI WA-988, NR-20, CReefs no. 3173; 1 female, AM P.80308, southern side of pass, Ningaloo reef, Western Australia (21°54'43"S 113°57'6"E), algae, 4.5 m, leg. N.L. Bruce & M. Blazewicz-Paszkowycz on SCUBA, 6 June 2008, MI WA-970, NIN 0 0 5, CReefs no. 3048.3 females, AM P.80307, inner lagoon, Ningaloo reef, Western Australia (21°53'9"S 113°59'26"E), brown algae, 2.6 m depth, 19 June 2008, leg. L.E. Hughes on SCUBA, MI WA-988, NR-20, CReefs no. 3173; 1 female, AM P.80308, southern side of pass, Ningaloo reef, Western Australia (21°54'43"S 113°57'6"E), algae, 4.5 m depth, leg. N.L. Bruce & M. Blazewicz-Paszkowycz on SCUBA, 6 June 2008, MI WA-970, NIN 0 0 5, CReefs no. 3048; 5 specimens, AM P.80320, Neds Camp, Cape Range National Park, Western Australia (-22° 113.9°), green brown algae, 1 m depth, leg. R. Springthorpe, 2 January 1984, WA-373.1 female, AM P.80315, west side of Malus Island, Dampier Archipelago, Western Australia (-26.51017° 116.64867°), fine Dictyota, sand and algal bottom, 2.3 m depth, leg. R.A. Pearth, 27 August 1999, WA-670; specimen, AM P.80319, Red Bluff, Kalbarri, Western Australia (-27.7° 113.1°), mixed corallines, 3 m depth, leg. R. Springthorpe, 10 January 1984, WA-480; 2 females, 1 male (?), AM P.80321, off Possession Point, King George Sound, Western Australia (-35.04167° 117.9°), brown algae, 7 m depth, leg. R. Springthorpe, 14 December 1983, WA-138; 1 ov. female, AM P.80318, off Possession Point, King George Sound, Western Australia (-35.04167° 117.9°), sand and detritus from bases of seagrasses, 10 m depth, leg. R. Spring- thorpe & J.K. Lowry, 14 December 1983, WA-131.
Etymology. This species is named for Marlene Coleman, the beloved mother of the senior author.
Description. Based on female holotype, 6.4 mm. Body shape (Fig. 1a) almost circular from above, coxal plates splayed very much, body flat, without a trace of a dorsal carina, except for a weak mid-dorsal elevation on pereonite 7 and pleonite 1. Pereonites 3 and 4 longest. Pleonite 1 with a pointed posteromarginal narrow tooth.
Head subquadrate, seen from above, shorter than the length of the first coxal plates, which partly cover the sides of the head; rostrum short and rounded; eyes small and round. Antenna 1 (Fig. 1f), peduncular article 1 largest, with a subquadrate anterior lobe, which is more than half as broad as article width; article 2 half as wide as article 1; flagellum 2-articulate (2nd article minute), this with long aesthetascs apically. Antenna 2 (Fig. 1b) long and slender; peduncular article 4 and 5 slender, not urn-shaped, flagellum 2-articulate. Upper lip wide, rectangular, with a shallow depression distally. Mandible (Fig. 2a, b) incisors dentate; raker row consisting of 3 small spines; molar just a narrow protrusion with a terminal seta, not triturative; no palp present. Lower lip (Fig. 1d) with small lobes and short mandibular processes. Maxilla 1 (Fig. 1g) inner plate missing (?), outer plate with 5 apical robust serrate setae, no palp present. Maxilla 2 (Fig. 1e) inner plate slightly wider than outer plate with few short stout setae apicomarginally. Maxilliped (Fig. 2c, f) inner plate apically truncate, with nodular setae distally; outer plate wide and rounded with few setae mediomarginally, palp 4-articulate, articles 2 and 3 medially produced with long slender setae, article 4 knob-like.
Pereon. Pereopod 1 (Fig. 2e) coxa large, triangular, covering basis to merus; basis expanded distally; ischium as long as merus; merus with anteromarginal notch and posterodistally drawn out; carpus with anterodistal group of robust setae; propodus nearly as long as carpus, with posterodistal robust setae; no palm present; dactylus relatively slender. Pereopod 2 (Fig. 2d) similar in shape, but shorter and coxa only slightly expanded distally, rather subrectangular. Pereopod 3 (Fig. 3a) coxa similar in shape to that of pereopod 2, but wider; basis expanded distally; ischium somewhat shorter than merus; merus with a deep shallow notch anteromarginally; carpus subquadrate and shorter than propodus; propodus tapering distally, with 1 robust seta posterodistally; dactylus relatively slender. Pereopod 4 (Fig. 3b) similar to pereopod 3, however the coxa has a posterodistal truncate lobe. Pereopod 5 (Fig. 3c) with bilobed coxa, anterior lobe larger than posterior; basis posteromarginally rounded with a ventral lobe as long as the distal margin of the ischium; ischium wider as long, anteriorly convex; merus wide and expanded distally, with posteroproximomarginal notch, rounded drawn out antero- und posterodistally; carpus excavate anteriorly, with a rounded protrusion anteroproximally; propodus oval, with distal robust setae on anterodistal region. Pereopod 6 (Fig. 3d) similar to pereopod 5, but coxa narrower and basis wider. Pereopod 7 (Fig. 4a) with smallest coxa, bilobed; basis posterior lobe dramatically drawn out and roundly angular; ischium wider than long; merus anterior margin straight ending in a rounded lobe, posterior margin posteriorly expanded; carpus anterior margin straight and drawn out distally, this process longer than that of posterodistally; propodus and dactylus as for pereopods 5 and 6.
Pleon. Pleopod 1 (Fig. 4e) peduncle subrectangular, as long as inner ramus, with 5 coupling hooks; outer ramus distinctly (1.3 x) longer than inner. Pleopod 2 (Fig. 4d) peduncle wider than long, expanded medially, with 5 coupling hooks; outer ramus 1.3 x as long as inner ramus; inner ramus longer than peduncle. Pleopod 3 (Fig. 4b) peduncle very short, with a long narrow medial lobe, at its end 3 coupling hooks; inner ramus minute, scale-like, half the length of the peduncle; outer ramus long, 2.5 x as wide as inner ramus. Uropod 1 (Fig. 4f, c) about 2 x as long as uropod 2; outer ramus subequal in length to peduncle, inner ramus 68% of outer. Uropod 2 peduncle as long as inner ramus; outer ramus 1.2 x as long as inner ramus. Uropod 3 peduncle wide and largely hidden by telson; inner ramus wanting, outer ramus 0.7 x peduncle length and half as wide. Telson (Fig. 4f) with parallel margins tapering into a rounded apex.
Sexual dimorphism. The outline of the habitus of the male is not circular but rather oval.
Remarks. For differences between this new species and Iphiplateia whiteleggei Stebbing, 1899, see Table 1.
Distribution. Western Australia: Ningaloo Reef; Kalbarri; Dampier Archipelago; King George Sound.
b
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d
c g e f a
b d
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description: Published as part of Coleman, Oliver & Lowry, James K., 2012, Revision of the genus Iphiplateia (Crustacea, Amphipoda, Phliantidae) from Australia, pp. 1-26 in Zootaxa 3393 on pages 2-5, DOI: 10.5281/zenodo.281784