Glandulotiron pilocaputis Just 2022, sp. nov.
Creators: name: Just, Jean
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Synopiidae
Glandulotiron
Glandulotiron pilocaputis

description: Glandulotiron pilocaputis sp. nov.
(Figs 14–16)
Type fixation. Holotype, ♀.—Here designated.
Etymology. The species is named for its hairy (pilosus) head (caput).
Material examined. Holotype, ♀, 6.3 mm. Western Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚56.1’S, 117˚53.9’E, 43 m, sand, 26 October 1983, CSIRO stn 05.83.B2, WAM C76566.
Paratypes. Australia, Northwest Shelf, between Dampier and Port Hedland, sand and gravel, CSIRO stn 3.83. B8.G. R5, WAM C54935 (2 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, CSIRO stn 03.83.B8.G. R6, WAM C54936 (1 ♀). Australia, Northwest Shelf between Dampier and Port Hedland, CSIRO 04.83. B13.G, WAM C54937 (1 specimen). Australia, Northwest Shelf, between Dampier and Port Hedland, CSIRO stn 04.83.B3.G, WAM C54938 (1 specimen). Australia, Northwest Shelf, between Dampier and Port Hedland, CSIRO stn 04.83.B8.G, WAM C54939 (1 specimen). Western Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚56.54’S, 117˚52.48’E, 44 m, 25 June 83, CSIRO stn 03.83.B2.G, NMV J73784 (1 juvenile). Western Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚50’S, 117˚53’E, G. Poore, NWA-9, CSIRO, NMV J73818 (9 specimens). Western Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚38’S, 18˚05’E, G. Poore, NWA-56, CSIRO, NMV J73819 (6 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 20˚20’S, 115˚59’E, G. Poore, stn NWA-38, NMV J73820 (15 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 20˚20’S, 115˚59’ E, G. Poore, NWA-38, NHMD 916109 (3 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚55.54’S, 117˚54.12’E, 22 April 1983, CSIRO stn 04.83.B2.G, NMV J73821 (4 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚56.9’S, 117˚53.5’E, 43 m, 18 February 1983, CSIRO stn 01/83/B2/G, NMV J73822 (1 specimen). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚04.8’S, 118˚50.7’E, 84 m, CSIRO stn 05.83.B2, NMV J73823 (2 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚04.8’S, 118˚50.7’E, 84 m, grab, CSIRO stn 05.83.B2, NMV J73824 (2 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚29.36’S, 118˚52.12’E, CSIRO stn 03.83.B8, NMV J73826 (3 specimens). Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚29.36’S 118˚52.12’E, CSIRO stn 03.83.B8.G, NMV J73827 (1 specimen). Australia, Western Australia, Northwest Shelf, between Dampier and Port Hedland, 19˚55.12’S, 117˚55.06’, 43 m, sand, gravel, CSIRO 03.83. B3.G, NMV J73828 (1 specimen). Australia, Northwest Shelf between Dampier and Port Hedland, 19˚28.18’S, 118˚55.12’E, 37 m, CSIRO stn 04.83.B9.G, NMV J73829 (♂ A). Australia, Western Australia, Northwest Shelf, between Dampier and Port Hedland, stns NWA 273–275, 26 October 1983 NMV J73830 (1 specimen).
Description (female). Head dorsal surface with long, thin setae. Rostrum acute, apex blunt. Interantennal lobes broad, truncate with equal-sized rounded corners. Accessory eye composed of 4 ommatidia, 3 appressed anteriorly and 1 separate more posteriorly;.
Mouthparts. Maxilla 1 palp with 5 short bi-dentate robust setae and single lateral elongate, serrate robust seta; outer plate with row of 9 denticulate robust setae. Mouthparts otherwise normal.
Antennae 1 as long as pereonite 1–5 and half of 6 combined along dorsum, peduncle article 2 about three quarter length of 1, article 3 half-length of 2, article 1 with single penicillate seta ventrally in posterior half; flagellum as long as peduncle, of 7 articles, assessory flagellum of 4 articles. Antenna 2 as long as pereonites 1–6 and most of 7 combined along dorsum, peduncular article 4 the longest, flagellum of 5 articles, articles 2–5 with single slender robust seta distally, otherwise sparsely setulose.
Coxal plates 1–4 rounded apex fringed with some long setae and dense row of fine setules.
Gnathopods 1 and 2 carpus both with scattered setae on anterior margin, 7–8 groups of unequally long setae along posterior margin. Gnathopod 1 propodus with 7–8 strong, pectinate robust setae on posterior margin. Gnathopod 2 propodus with a few scattered simple setae.
Pereopods 3–4 propodus with long, plumose seta anterodistally.
Pereopods 5–7 basis with posterodistal rounded projection. Pereopods 5 and 6 basis broadest distally. Pereopod 7 broadest proximally, posterior margin slightly sinuous, posteroproximal expansion rounded angular. Pereopods 7 with long setae in submarginal row on medial surface.
Uropod 1 peduncle reaching just beyond uropod 2 peduncle, rami of equal length, as long as peduncle, with a few small robust setae. Uropod 2 peduncle with about 11 glandular openings ventrolaterally, and at least 3 on adjacent urosomite 2, outer ramus about 4/5 length of inner ramus, rami generally reaching to middle of uropod 3 outer ramus. Uropod 3 peduncle about 2/3 length of rami, with row of about 7 glandular openings ventrolaterally, rami elongate oval, reaching beyond apex of telson, outer ramus article 1 with row of 8 robust setae dorsolaterally, and 6 small robust setae ventrolaterally, small second article with 3 dorsal robust setae; inner ramus reaching to about end of basal article of outer ramus, dorsolateral margin with row of long setae, apex with 3 robust setae.
Telson. Reaching 2/3 along outer ramus of uropod 3, length/width 2.2, each lobe with dorsal row of 4 robust setae, slender simple setae along lateral margins, and single apical robust seta.
Male. Generally as female but differing as follows: antenna 1 peduncle article 1 with 1 large and 3 small brush setae ventrally and 2 large ones dorsally; flagellum article 1 with ventral row of many long aestetascs in single field medioventral callynophore; posterior flange of basis of pereopod 7 broader. Uropods and telson as female although uropod 2 rami are slightly longer in relation to uropod 1.
Size. Largest ♀, 6.9 mm. Largest ♂, 5.4 mm.
Distribution. Northern Western Australia, 37– 84 m.
description: Published as part of Just, Jean, 2022, Tirons of the world: a review of ' tironid' amphipods, description of new genera and species, and establishment of a new subfamily Tironinae Stebbing, 1906 stat. nov. (Crustacea, Synopiidae), pp. 1-89 in Zootaxa 5139 (1) on pages 28-29, DOI: 10.11646/zootaxa.5139.1.1, http://zenodo.org/record/6572023