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) Author Just, Jean text Zootaxa 2022 2022-05-23 5139 1 1 89 http://zoobank.org/145cb6f5-2ea8-40b0-9cca-3e942aa4a5b9 journal article 95147 10.11646/zootaxa.5139.1.1 8ab25605-ec09-4d57-9dbd-7da2b032e5e8 1175-5326 6572023 145CB6F5-2EA8-40B0-9CCA-3E942AA4A5B9 Glandulotiron spinipes sp. nov. ( Figs 21–22 ) Type fixation . Holotype , ♀ .—Here designated. Etymology . The species is named for the long row of robust setae along the anterior margin of the basis of gnathopod 2. Material examined. Holotype , ♀ , 9.0 mm. Australia , Victoria , Bass Strait , 30 km SSW of Warrnambool , 38˚38.12’S, 142˚35.00’E, 59 m , epibenthic sled, R . S. Wilson , 20 November 1981 , RV Tangaroa , stn BSS 188 , NMV J73751 . Paratypes . Same data as holotype, NMV J75152 ( 2 specimens ) . Australia , Tasmania , Central Bass Strait , 35 km N of Cape Wickham , King Island , 39˚13.36’S, 143˚55.36’E, 85 m , fine sand, S-M grab, R . Wilson , 23 November 1981, RV Tangaroa , stn BSS205 , NMV J73726 ( 1 ♀ , 2 ♂ ) . Australia Victoria , Western Bass Strait , 15 km S of Cape Otway , 39˚00’S, 143˚32’E, 81 m , coarse shell, G.C.B. Poore , 8 October 1980 , HMAS Kimbla , stn BSS50 , NMV J73735 ( 1 ♀ ) . Australia , Tasmania , Eastern Bass Strait , Flinders Island , 70 km N of North Point , 39˚05.12’S, 147˚56.36’E, 62 m , shelly sand, WHOI epibenthic sled, R . Wilson , 17 November 1981 , RV Tangaroa , stn BSS172 , NMV J73745 ( 1 ♀ ) . Australia , Victoria , Central Bass Strait , 65 km S of Cape Schanck , 39˚08.18’S, 144˚43.54’E, 66 m , coarse sand, R . Wilson , 23 November 1981 , RV Tangaroa , stn BSS201 , NMV J73746 ( 1 ♀ ) . Australia , Tasmania , Central Bass Strait , King Island , 35 km N of Cape Wickham , 39˚13.36’S, 143˚55.36’E, 85 m , fine sand, R . Wilson , 23 November 1981 , RV Tangaroa , stn BSS205 , NMV J73747 ( 3 ♀ ) . Australia , Tasmania , Western Bass Strait , King Island , 59 km WNW of Cape Farewell , 39˚28’S, 143˚17’E, 103 m . coarse sand, G.C.B. Poore , 10 October 1980 , HMAS Kimbla , stn BSS81 , NMV J73748 (1 ovig. ♀ ) . Australia , Tasmania , Eastern Bass Strait , Flinders Island , 70 km N of North Point , 39˚05.12’S, 147˚56.36’E, 62 m , shelly sand, R . Wilson , 17 November 1981 , RV Tangaroa , stn BSS172 , NMV J73749 ( 1 ♀ ) . Australia , Victoria , Western Bass Strait , 31 km SSW of Cape Otway , 39˚08’S, 143˚24’E, 77 m , medium sand, G.C.B. Poore , 8 October 1980 , HMAS Kimbla , stn BSS56 , NMV J73750 ( 2 ♀ ) . Australia , Tasmania , Eastern Bass Strait , Flinders Island , 94 km NE of North Point , 38˚53.42’S, 147˚55.06’E, 71 m , medium sand, R . Wilson , 17 November 1981 , RV Tangaroa , stn BSS171 , NMV J73752 ( 2 ♂ , 10 ♀ ) . Australia , Central Bass Strait , 35 km WNW of West Point , Tasmania , 40˚47.4’S 144˚17.7’E, 99 m , coarse sand, M. Gomon et al. , 2 February 1981 , FRV Hai Kung , stn BSS125 , NMV J75153 ( 1 ♀ ) . Australia , Tasman Sea , 34°17’05”S , 168°21’30”E , 780–800 m , beam trawl, P.B. Berents , 02 Jun 2003 , RV Tangaroa , stn TAN0308/141, AM P72854 ( 11 specimens ) . Australia , Tasmania , Eastern Bass Strait , Flinders Island , 94 km NE of North Point , 38˚53.42’S, 147˚55.06’E, 71 m , medium sand, R . Wilson , 17 November 1981 , RV Tangaroa , stn BSS171 , NHMD 916112 ( 5 specimens ) . Description (female). Rostrum with rounded apex. Interantennal lobes broad, truncate, lower corner more angular than upper corner. Accessory eye composed of 6 ommatidia in crescent. Mouthparts . Maxilla 1 with 5 short, blunt, bi- to 3-cusped apical setal spines and a single more slender serrate one in lateral corner; outer plate with row of 9 denticulate setal spines. Mouthparts otherwise normal. Antennae 1 as long as pereonite 1 to half of 5 combined along dorsum, peduncle article 2 about half as long as 1, article 3 2/3 length of 2, article 1 with single penicillate seta dorsodistally and 2 medioventrally; flagellum as long as peduncle, of 8 articles, assessory flagellum of 4 articles, both sparsely setulose. Antenna 2 as long as pereonites 1–6 combined along dorsum, peduncular article 4 the longest, flagellum of 6+ articles, articles 1–6 with single slender robust seta distally, antenna otherwise sparsely setulose. Coxal plates 1–3 distally fringed with setae of varying length, without brim of fine setules, plate 4 without setae. Gnathopods 1 and 2 propodus slightly less than half as long as carpus; carpus with scattered setae on anterior margin, 10–12 groups of unequally long setae along posterior margin; dactylus with unguis 0.4 length of propodus, nearly straight. Gnathopod 1 basis with long and short anterior and posterior setae; propodus with row of 4–5, pectinate setae on posterior margin. Gnathopod 2 basis less setose, with row of 12 robust setae on anterodistal margin. FIGURE 21. Glandulotiron spinipes gen. et sp. nov. Holotype, ♀, except M , ♂ paratype. clv , head lateral view; mx1 , axilla 1; tel , telson; us , urosome. FIGURE 22 . Glandulotiron spinipes gen. et sp. nov. Holotype, ♀. cox3 , coxal plate 3; gp1 , gnathopod 1; gp2 , gnathopod 2; p4–7 , pereopods 4 to 7. Pereopods 3–4 basis with a few long anterior and posterior setae. Pereopods 5–7 basis with posterodistal rounded projection, pereopod 5 broadest distally, pereopod 6 broadest in middle, pereopod 7 broadest proximally with large rounded posterior projection; posterior margin crenulate in 7; propodus of pereopod 5 as long as carpus, of pereopod 6 3/4 length of carpus, of pereopod 7 half-length of carpus. Pereopod 6 with single and pereopod 7 with row of long setae submarginally on medial surface of basis. Uropod 1 peduncle reaching about 2/3 along peduncle of uropod 2 peduncle, rami of equal length, about 2/3 length of peduncle, reaching to end of rami of uropod 2; both uropods reaching barely halfway along outer ramus of uropod 3. Uropod 2 rami of equal length. Uropod 3 peduncle about 3/4 length of outer ramus, outer ramus basal article with row of 7 robust setae dorsolaterally, and 6 very small robust setae ventrolaterally, small second article with 3 dorsal robust setae; inner ramus reaching to 9/10 of basal article of outer ramus, dorsal margin with row of long setae and 2 robust setae, apex with 3 robust setae. Telson. Reaching 2/3 along outer ramus of uropod 3, length/width 2.0, with row of 4 robust setae, small simple setae and 1 plumose seta dorsally on each lobe, apices with 1 long and 1 short robust seta. Male. Similar to female but antenna 1 flagellum article 1 very long and slender, with medioventral single-field callynophore. Size . Largest ♀ , 9.0 mm. Largest ♂ , 8.5 mm . Distribution . Australia , Bass Strait; 59– 103 m .