Glossobius anctus Bruce & Bowman 1989

Glossobius anctus

MATERIAL.—All from Euleptorhamphus viridis (van Hasselt). PACIFIC OCEAN: Australia: Western Australia, North West Shelf, 18°25′S, 118°52′E, 150 m depth, coll. F.R.V. Soela, 17 May 1979, ovigerous , 28.0 mm (holotype, AM P35743) and , 9.5 mm (paratype, AM P35744). New South Wales, Bryon Bay, 28°38′S, 153°37′E, 26 Jun 1910, , 8.0 mm (AM P35745). Japan: Iozu Sea, non-ovigerous , 26.0 mm (paratype, USNM 227113). Wahasa Bay, Yoroo, 1929, ovigerous , 30.0 mm and immature, 4.0 mm (paratypes, USNM 227110). Hawaii: Honolulu, ovigerous , 25.5 mm and , 8.2 mm (paratypes, USNM 227112). Honolulu, coll. Albatross, ovigerous , approximately 34 mm, head missing, (USNM 227111).

TYPES.—Holotype, AM P35743; paratypes, AM P35744, USNM 227110,227112,227113.

TYPE LOCALITY.—North West Shelf of Western Australia, 18°25′S, 118°52′E.

ETYMOLOGY.—From the Latin anctus, meaning choke, alluding to the buccal-filling size of this species.

DESCRIPTION OF FEMALE.—Body straight, about 4 times as long as wide, sides subparallel; dorsum strongly vaulted. Rostrum anterior margin bluntly rounded; eyes very small, triangular, facets indistinct. Pereonite 1 anterolateral angles scarcely produced. Pereonites 1–3 subequal in length; pereonites 4–6 progressively decreasing in length, pereonite 7 distinctly shorter than pereonite 6, about 25% length of pereonite 1. Coxae all shorter than pereonites; widest anteriorly, between half and two-thirds as wide as long. Pleonites 1 and 5 subequal in length, longer than pleonites 2–4; posterior margin of pleonite 5 not lobed. Pleotelson lateral margins converging slightly; posterior margin truncate, with medial emargination.

Antennule extending to posterior of cephalon, composed of 7 articles. Antenna extending to posterior of cephalon, composed of 9 articles.

Labrum prominent, fleshy, anterior margin rounded, posterolateral margins produced. Mandible palp article 3 with 6 terminal setae, medial margins with microtrichs. Maxillule with 4 terminal spines. Maxilla with 14 spines on lateral lobe, 10 on endopod. Maxilliped article 3 with 2 terminal spines.

Pereopods 1 and 2 of similar proportions, but pereopods 2 and 3 longer than pereopod 1 and pereopod 3 less robust than l and 2.

Pleopods same as G. impressus. Uropod rami both bluntly rounded, extending just beyond posterior of pleotelson.

DESCRIPTION OF MALE.—About one-third length of female. Antennule with 6 or 7 articles, antenna with 7 or 8. Maxilla lateral lobe with 4 spines, endopod with 3. Mandible palp article 2 with about 6 stout setae at mediodistal angle; article 3 medially constricted, with 8 stiff setae on mediodistal margin. Maxillule with 4 terminal spines. Maxilliped article 3 with 4 terminal hooked spines; medial margins with fine serrate scales. Pereopods less robust than in female; pereopods 5–7 basis with moderately developed expansions. Penes elongate.

COLOR.—Pale to tan in alcohol.

SIZE.—Ovigerous females between 25.5 and 34.0 mm, one non-ovigerous female was 26.0 mm, males between 8.0 and 9.5 mm.

DISTRIBUTION.—Tropical and subtropical Pacific and Indian Ocean, with records from Hawaii, Japan, and eastern and western Australia.