Gabophlias gabiae 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
Gabophlias
Gabophlias gabiae

description: Gabophlias gabiae sp. nov.
(Figs 1–5)
Material examined. Holotype female, 4.5 mm, MV J60494, west side of Harbour, Port Campbell, Victoria, Australia (38°37'30''S 142°59'30''E), 3.5 m depth, L. Avery, M. Toole & H. Arundel, 5 March 1996, Quadrat/ Scuba, VNPMS 59 5.
Type locality. West side of Harbour, Port Campbell, Victoria, Australia (38°37'30''S 142°59'30''E), 3.5 m depth.
Additional material examined. 2 females, 2 males, 1 juvenile, AM P 80323, 500 m east of Whaler's Point Lighthouse, Portland, Victoria, Australia (38°20'30.012"S 141°37'30"E), brown algae from bolder bottom, 10 m depth, R.T. Springthorpe & P.M. Berents, 1 May 1988, VIC-58; 9 specimens, AM P.88038, Henty Reef, Apollo Bay, (38°47'S 143°40'30"E), brown algae, 4.5 m depth, P.B. Berents & R.T. Springthorpe, 25 April 1988, VIC-11; 1 specimen, AM P.88039, Henty Reef, Apollo Bay (38°47'S 143°40'30"E), brown algae, 4.5 m depth, P.B. Berents & R.T. Springthorpe, 25 April 1988, VIC-7.
Etymology. This species is named for Gabriele Coleman, sister of the senior author.
Description. Based on female holotype, 4.5 mm. Habitus. Body (Fig. 1a) dorsoventrally flat, oval in shape, coxal plates and appendages splayed. Pereonites relatively slender. Pleonite 3 longest, with a shallow middorsal elevation on pleonite 1. Pleonite 1 pointed posteromarginally. Head (Fig. 1a, c) wider than long, lateral margins weakly concave, surpassed by coxa 1; with a short rounded rostrum; eyes small, rounded. Antenna 1 (Fig. 1b) peduncle article 1 distally expanded; article 2 as wide as article 1, with rounded medial lobe, bordered with short setae, drawn out distally; article 3 short, distally rounded; flagellum uniarticulate, inserted subterminally into peduncular article 3, with an apical tuft of long aesthetascs. Antenna 2 (Fig. 1d) peduncle article 4 expanded distally, anterior and posterior margins straight; article 5 slightly shorter than article 4, margins convex; flagellum 4-articulate. Upper lip (Fig. 2b) rounded distally. Mandibles (Fig. 1e) both with dentate incisor. Maxilla 1 (Fig. 1f) with 5 distal robust setae on outer plate, inner plate missing (?), palp not developed. Maxilla 2 (Fig. 2a) inner plate more than twice as wide as outer plate, both plates with few short stout setae apicomarginally. Maxilliped (Fig. 2d) inner plate apically truncate, with nodular setae distally; outer plate wide and rounded with few setae mediomarginally; palp 4-articulate, articles 2 and 3 slightly produced medially with long slender setae; article 3 as wide as article 2; article 4 pointed.
Pereon. Pereopod 1 (Fig. 2c) coxa subtriangular; basis expanded posterodistomarginally; ischium subequal in length to merus; carpus expanded distally, with a group of stout setae anterodistally; propodus anteroproximally with a field of stout setae, posterior margin proximally roundly produced, with 3 stout robust setae halfway between carpus and dactylus and additional robust seta distally(3+1 arrangement); dactylus falcate. Pereopod 2 a b c d e
f a b c d e f a b c a b c b
a c d (Fig. 2f) coxa subrectangular; basis to dactylus similar to that of pereopod 1, but only 2+1 robust setae on propodus posteromarginally. Pereopod 3 (Fig. 3a) coxa subrectangular, but wider than that of pereopod 2; basis distally expanded; ischium subequal to merus; merus expanded anterodistomarginally; carpus wider than long; propodus tapering distally, produced proximoposteromarginally, with 2+1 robust setae; dactylus falcate. Pereopod 4 (Fig. 3b, c) coxa subquadrate with a posteroproximomarginal excavation; basis subrectangular; merus to dactylus similar to those of pereopod 3, but with a 3+1 arrangement of robust setae on propodus. Pereopod 5 (Fig. 4a) coxa wider than long, bilobed, anterior lobe wider and slightly longer than posterior one; basis ovoid with long ventral lobe; ischium posterior margin half as long as anterior one; merus twice as wide as ischium, distally expanded, especially posterodistomarginally; carpus wider than long, distally expanded; propodus tapering distally, anteroproximally lobate and 3+1 robust setae; dactylus falcate. Pereopod 6 (Fig. 4b) coxa similar in shape to that of pereopod 5 but smaller; basis as wide as long, posterior lobe wider than that of pereopod 5; merus and propodus similar in shape as for pereopod 5, but wider. Pereopod 7 (Fig. 4c) similar to pereopod 6 but basis somewhat smaller.
Pleon. Pleopod 1 (Fig. 5a) with slender peduncle, 6 coupling hooks on inner margin; rami equal. Pleopod 2 (Fig. 5c) peduncle subtriangular, medially expanded and tapering, with 5 coupling hooks distally, inner ramus slightly shorter than outer. Pleopod 3 (Fig. 5d) peduncle shorter than wide, medially narrowly extended with 4 coupling hooks; inner ramus reduced to a small scale, outer ramus about 6 × the length of inner ramus.
Uropod 1 (Fig. 5b) peduncle slightly shorter than outer ramus; inner ramus 1/3 of outer ramus and half the width. Uropod 2 (Fig. 5b) peduncle half the length of that of uropod 1; outer ramus 2.5 × as long as inner. Uropod 3 (Fig. 5b) mostly covered by telson; peduncle about 2 as long as wide; only one slender ramus present, 3 × as long as wide. Telson (Fig. 5b) longer than wide, convex lateromarginally, tapering distally.
Remarks. For differences to Gabophlias olono and Gabophlias kerstinae sp. nov. see table 1.
Distribution. Australia: Victoria.
description: Published as part of Coleman, Oliver & Lowry, James K., 2012, Two new species of Gabophlias (Crustacea, Amphipoda, Phliantidae) from Australia, pp. 21-35 in Zootaxa 3441 on pages 22-28, DOI: 10.5281/zenodo.208879