Linguimaera pirloti Krapp-Schickel 2003

Hughes, Lauren E., 2016, New genera, species and records of Maeridae from Australian Waters: Austromaera, Ceradocus, Glossomaera, Hamimaera, Huonella gen. nov., Linguimaera and Maeraceterus gen. nov. (Crustacea: Amphipoda), Zootaxa 4115 (1), pp. 1-81 : 67-69

Linguimaera pirloti Krapp-Schickel 2003

( Figs 55–57 )

Linguimaera othonides .— Pirlot, 1936: 309 –311, fig. 132. Linguimaera pirloti Krapp-Schickel, 2003: 261 , fig. 2.

Material examined. Male, 11 mm, dissected, 4 slides, AM P.92233,;1 female, dissected in part, 1 slide, AM P.92232; 2 juveniles, AM P.97878, eastern Joseph Bonaparte Gulf, Van Diemen Rise , Northern Territory (11°34'46"S 129°52'04"E), 188 m, Smith-McIntyre Grab, 17 September 2009, coll. Geoscience Australia (SOL 4934, 40GR73) ; 1 female, dissected in part, 1 slide, AM P.78848, Area C East, Arafura Sea (9°22'59"S 134°09'47"E), 108 m, muddy sand with bioclasts, Smith-McIntyre grab, 11 May 2005, coll. G.D.F. Wilson, RV Southern Surveyor (SS05/2005/019/GR032); 6 specimens (including 2 males and 4 juveniles), AM P.78852, Area C East, Arafura Sea (9°21'22"S 134°07'05"E), 101 m, Smith-McIntyre grab, 11 May 2005, coll. G.D.F. Wilson, RV Southern Surveyor (SS05/2005/020/GR035).

Type locality. Sailus ketjil, Iles Paternoster , Sulawesi (Siboga Expedition stn 37).

Description. Based on male, 11 mm, AM P.92233.

Head. Eyes subovate; lateral cephalic lobe broad, rounded, apically truncate, anteroventral margin with notch/ slit, anteroventral corner rounded. Antenna 1 longer than antenna 2; peduncular article 1 shorter than article 2, with 1 robust seta on posterior margin; peduncular article 2 longer than article 3; flagellum articles as long as broad, or broader than long, with 28 articles; accessory flagellum short, significantly less than half length of primary flagellum, with 5 articles. Antenna 2 peduncular article 4 longer than article 5; flagellum with 14 articles. Mandible accessory setal row, well developed with 7 setae; palp well developed, article 1 length 1.1 × width, shorter than article 2; article 2 longer than article 3, with many slender setae; article 3 rectilinear, long, 4 × as long as broad, longer than article 1, with 5 apical slender setae. Lower lip unkown. Maxilla 1 unknown.

Pereon. Gnathopod 1 coxa anterior margin concave, anteroventral corner produced, acute, posteroventral corner without notch; merus with acute posteroventral corner; carpus length 2.9 × width, subequal to propodus length, setae covering medial surface; propodus subovate, medial surface setal comb absent; palm acute, straight to weakly convex, entire, lined with robust setae, without posterodistal corner; dactylus closing along palm.

Gnathopod 2 symmetrical, subchelate; coxa posteroventral corner without notch; basis slender, anterodistal corner subquadrate, with distal long slender setae; merus with subquadrate posteroventral corner; carpus subtriangular, length twice width, margins with long slender setae; propodus rectilinear, length 2.1 × width, margin with rows of long slender setae, palm angle subacute, margin sculpted, lined with robust setae, robust setae extending beyond palm corner, palm defined by posteroventral corner with 2 large robust setae; dactylus closing along and reaching end of palm, unguis present.

Pereopods 5–7 slender distally; basis posterior margin straight, serrate, without long slender setae; merus and carpus not broadened; dactylus unguis simple.

Pleon. Pleonites 1–3 dorsally smooth. Epimera 1–2 posterior margin serrate distally. Epimeron 3 posterior margin serrate along length. Urosomites 1–3 without carina. Uropod 1 peduncle with 1 basofacial seta; rami damaged. Uropod 2 peduncle length subequal to outer ramus; inner ramus longer than outer ramus. Uropod 3 rami subequal in length, much longer than peduncle, length 4.8 × width, distally truncated, with lateral and apical long and short robust setae. Telson deeply cleft, length 1.1 × width, lobes divergent, tapering distally, each lobe with short inner and longer outer apical cusp, lobes apically acute, margins concave, each lobe with 2 short and 1 long apical robust setae, with 1 pair of robust setae on inner margins, without lateral robust setae.

Remarks. This is only the second record of L. pirloti originally described from Sulawesi, the material cited here is from the nearby location of the Arafura Sea.

Distribution. Indonesia. Sulawesi ( Krapp-Schickel 2003). Australia Northern Territory: Van Diemen Rise, Arafura Sea (current study).

Figures

FIGURE 55. Linguimaera pirloti Krapp-Schickel, 2003 male, 11 mm, AM P. 92233, eastern Joseph Bonaparte Gulf, Van Diemen Rise, Northern Territory.

FIGURE 56. Linguimaera pirloti Krapp-Schickel, 2003 male, 11 mm, AM P. 92233, eastern Joseph Bonaparte Gulf, Van Diemen Rise, Northern Territory, scales 0.1 mm.

FIGURE 57. Linguimaera pirloti Krapp-Schickel, 2003 male, 11 mm, AM P. 92233, eastern Joseph Bonaparte Gulf, Van Diemen Rise, Northern Territory, scales 0.1 mm.