Figorella angulosa, Lowry & Stoddart, 2012

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69: 22-23

publication ID

http://doi.org/ 10.11646/zootaxa.3246.1.1

DOI

http://doi.org/10.5281/zenodo.5251210

persistent identifier

http://treatment.plazi.org/id/456087D3-3630-FF9F-B8DF-0D74FC6C4C4C

treatment provided by

Felipe

scientific name

Figorella angulosa
status

sp. nov.

Figorella angulosa   sp. nov.

( Figs 14 View FIGURE 14 , 15 View FIGURE 15 )

Type material. HOLOTYPE, female, ovigerous (2 eggs), 3.2 mm, AM P.46668, east of Merimbula , New South Wales, Australia, 36°56.2'S 150°23.00'E to 36°57.00'S 150°22.5'E, 1600 m, epibenthic sled, 12 December 1986, R. T. Springthorpe, RV Franklin, stn FR1086-08 GoogleMaps   . PARATYPES: 1 female, ovigerous (2 eggs), MV J62421 View Materials   , south of Point Hicks , Victoria, Australia, 38°19.60'S 149°24.30'E to 38°19.00'S 149°27.30'E, 930–951 m, rock, rubble, clay, sand and biogenic sediment, epibenthic sled, 23 July 1986, M.F. Gomon et al., RV GoogleMaps   Franklin , stn SLOPE 33   ; 2 juveniles, MV J62420 View Materials   , south of Point Hicks , Victoria, Australia, 38°21.90'S 149°20.00'E to 38°21.40'S 149°20.90'E, 1000 m, epibenthic sled, 23 July 1986, G.C.B. Poore et al., RV GoogleMaps   Franklin , stn SLOPE 32   .

Etymology. The specific name angulosa   refers to the shape of epimeron 3.

Diagnostic description. Head lateral cephalic lobe large, narrowly rounded; ventral margin curved. Antenna 1 peduncular article 1 without posterodistal spine; accessory flagellum 2-articulate, article 1 short; flagellum without callynophore in female, [male not known]. Mandible lacinia mobilis a simple robust seta; lamina dentata absent; accessory setal row present, not on raised setose ridge; molar absent; palp article 2 broad, longer than article 3; article 3 with both margins slightly convex. Maxilla 1 outer plate with 9 setal-teeth in 6/3 arrangement, some outer row setal-teeth with medial cusps; palp well developed, 1-articulate, with apical slender setae. Maxilliped inner plate small; outer plate large; palp 4-articulate, article 4 large. Gnathopod 1 chelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 1.8 × breadth, posterior margin well developed, palm with produced corner, posterodistal corner of palm not attenuated, with simple robust seta; dactylus reaching to corner of palm. Gnathopod 2 palm minute, obtuse. Pereonite 4 without dorsal spines. Pereonite 5 without dorsal spines. Pereopod 5 merus without posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe weakly produced; merus longer than broad, without posteroproximal shoulder. Pereopod 7 basis subovate with posterior margin weakly dentate. Oostegites from gnathopod 2 to pereopod 5. Epimeron 3 posterior margin with a strong, rounded projection, posteroventral corner subquadrate. Uropod 3 biramous, inner ramus extending less than halfway along outer ramus. Telson   shorter than broad, entire.

Remarks. Figorella angulosa   and F. franklin   both have a 1-articulate palp on maxilla 1 and the corner of gnathopod 1 palm not attenuated. They differ in that F. angulosa   has 9 setal-teeth on the outer plate of maxilla 1 and uropod 3 inner ramus slightly shorter than article 1 of the outer ramus, whereas F. franklin   has 10 setal-teeth on the outer plate of maxilla 1 and uropod 3 inner ramus longer than article 1 of the outer ramus.

Distribution. South-eastern Australia, Tasman Sea; 930–1000 m depth.

AM

Australian Museum

R

Departamento de Geologia, Universidad de Chile

T

Tavera, Department of Geology and Geophysics

RV

Collection of Leptospira Strains

MV

University of Montana Museum