Macrosarisa fahrbachi, Brandão, 2010

MACROSARISA FAHRBACHI View in CoL SP. NOV. ( FIGS 14 View Figure 14 , 30F–I View Figure 30 , 33 View Figure 33 )

Etymology: In honour of Dr E. Fahrbach, the chief scientist of the ANDEEP III cruise.

Material: 4 live specimens.

Holotype: 1 A M ( SNB 0148 ) (soft parts in glass slide, valves in micropalaeontological slide), ANDEEP II , #139-6-E, ZMH K-41472 .

Paratypes: 1 A M ( SNB 0225 -DNA 33), ANDEEP II , #139-6-E, ZMH K-41475 ;

1 A F (SNB 0226-DNA 34), 1 A M (SNB 0114-DNA 17), ANDEEP III , # 81-8-E+S, ZMH K-41473.

Distribution ( Fig. 14 View Figure 14 ): Weddell and Scotia Seas , 3947– 4420 m.

Valve measurements: Holotype, RV A M L 1.82 mm, H 0.68 mm; LV 1.80 mm, H 0.65 mm. Paratypes, A L 1.80–1.90 mm, H 0.68–0.72 mm.

Diagnosis: Carapace medium-sized (for the genus). In lateral view, elongate; posterior margin acutely pointed and anterior margin narrowly rounded; ventral margin straight. Male appendage V very asymmetrical. Female appendage V with medial seta of podomere V over four times longer than ventral and dorsal setae. Hemipenis subhemispherical. Chitinized tube of Zenker’s organ wide; terminal bulb tiny.

Description: Carapace medium-sized (for the genus). In lateral view, elongate; dorsal margin slightly arched, posterodorsal margin slightly concave; posterior margin acutely pointed and anterior margin narrowly rounded; ventral margin straight. Vestibules wide; zone of concrescence very narrow; radial pore canals very short and straight; dentiform corners inconspicuous; adductor muscle scars occupying a small area of the valve surface.

Antenna I slender, elongate with thin, flexible setae; suture between podomeres I and II very faint; podomere IV elongated. Antenna II slender, suture between podomeres II and III faint; podomere IV very elongate. Basis of mandible with one short, dorsal seta, plus one conical and four trifurcating teeth and several setae. Maxilla I with two or three strahlen and over 18 feathered setae; suture between podomeres II and III (palp podomeres I and II) very faint. Female appendage V short and thick, medial seta of podomere V the longest, other two setae conspicuously shorter. Male appendage V very asymmetrical, podomere III straight or recurved at 90°. Appendages VI and VII very elongate; reflexed seta of podomere VI of appendage VII long. Furca robust with symmetrical rods; terminal setae fused to the rods. Hemipenis subhemispherical, with relatively short and bifurcated copulatory process. Chitinized tube of Zenker’s organ wide, terminal bulb very small.

Adult chaetotaxy: Antenna I 1, 2(0/.2)+3(.1/.1), 4(.1/.1), 5(.1/.1), 6(.2/.3), 7(0/0:4). Antenna II 1(0/0:1-2), 2(0/ 0:1), Exopodite (0/0:2,1r), 3(0/.5-6.4), 4[female (.1r./.1.1c,2)] [male (.1r./.2.1c,2mod,1)], 5(0/1c,1:3c,2), 6(0/ 0:2c,3). Mandible 1(.1/0: 5t,+8), 2(0/.2:1), Exopodite (1r,7-8), 3(0/.4:3-4), 4(.5.2/.3-4), 5(.2c./0:1-2c,3-4). Maxilla I vibratory plate (2-3strahlen,+18), palp 1(.1/ 0), 2(.3-4/0), 3(0/0:6). Appendage V 1(0/.1.2.1), Exopodite (0/0:5), [female 2, 3, 4(0/.1), 5(.1./0:1c,1)] [male 2(0/2mod,1:1r), 3(0/.1r:1mod)]. Appendage VI 1(.2./0), 2(.1.1.1./.1), 3(.1/0), 4(.1/0), 5(.1,1r/0), 6(0/ 0:1,2c). Appendage VII 1(0/0:0-1), 2(.1.1.1/0), 3(.1/0), 4(.1/0), 5(.2/0), 6(0/0:2,1mod). Furca (0/0:1,2-3r).

Remarks: Valves of Ms. fahrbachi sp. nov. are (1) conspicuously more elongated than Ms. muensteriana ; (2) less sinuous than Ms. capacis and Ms. texana ; (3) more subtriangular than M. graysonensis , Ms. hiulca , and Ms. procera ; (4) less rectilinear than Ms. elegantula and Ms. siliqua ; (5) higher in relation to length than M. exquisita , Ms. simplex , and M. wrightii .

Antenna II and the mandible of Macrosarisa andeep sp. nov. are very similar to those of Ms. fahrbachi sp. nov.; therefore these appendages are only drawn for the former species.

GENUS MACROSCAPHA MADDOCKS, 1990 View in CoL

( FIGS 34–65 View Figure 34 View Figure 35 View Figure 36 View Figure 37 View Figure 38 View Figure 39 View Figure 40 )

Type species: Macroscapha atlantica Maddocks, 1990 (original designation).

Additional species (listed by original binomen): Macroscapha gyreae Maddocks, 1990 ; Mh. heroica Maddocks, 1990 ; M. inaequalis Müller, 1908 ; Mh. inaequata Maddocks, 1990 ; Mh. jiangi Maddocks, 1990 ; M. ( Mn.) marchilensis (Hartmann, 1965) ; Mh. opaca Maddocks, 1990 ; Mh. sinuata Maddocks, 1990 ; M. tensa * Müller, 1908 * nomen dubium; Mh. turbida ( Müller, 1908) ; Mh. cactus sp. nov., Mh. falcis sp. nov.; Mh. rehmi sp. nov.; Mh. scotia sp. nov.; Mh. subhemispherica sp. nov.; Mh. solecavai sp. nov.; Mh. walterae sp. nov.

MACROSCAPHA INAEQUALIS (G. W. MÜLLER, 1908) View in CoL

( FIGS 34–36 View Figure 34 View Figure 35 View Figure 36 )

1908 Macrocypris inaequalis Müller, 1908: 95-96 View in CoL , pl. 12, figs 1–7.

1990 Macroscapha inaequalis, Maddocks, 1990: 98-99 View in CoL , figs 14.13, 14.14, 15.14, 15.15, 27.20, 27.21, 31.8, 34.13, 42.5, 47.38, 69.2, 74.6, 77.8, 79.2; pls. 36.11, 36.12, 37.11, 37.12, 80.21, 93.1-4, 105.9-13, 111.10

1990 Macroscaphia (print error) inaequalis, Hartmann, 1990: 215 View in CoL , figs. (part 2) 8–11.

1997 Macroscapha inaequalis, Hartmann, 1997: 245– 246 View in CoL , fig. 103.

Material: 30 live specimens plus 3 valves.

Lectotype: soft parts and valves of 1 A M on a glass slide labelled ‘Zool. Mus. Berlin, I. N. 13129, * Macrocypris inaequalis G. W. Müller, Gauss-Stat , 385 m, D. Südpolar Exp., 2.12.2, Gauss, 181’ and bearing Maddocks’ (1990) specimen number ‘1940 ♂, Lectotype’.

Paralectotypes: soft parts and valves of 1 A F on a glass slide labelled ‘Zool. Mus. Berlin, I. N. 13129, * Macrocypris inaequalis G. W. Müller, Gauss-Stat , 385 m, D. Südpolar Exp., Gauss, 181♀, 2.03’ and bearing Maddocks’ (1990) specimen number ‘1939 ♀, Paralectotype’ .

Soft parts and valves of 1 A M on a glass slide labelled ‘Zool. Mus. Berlin, I. N. 13129, * Macrocypris inaequalis G. W. Müller, Gauss-Stat , 385 m, D. Südpolar Exp., Gauss, 181♂, 2.03’ and bearing Maddocks’ (1990) specimen number ‘1941 ♂, Paralectotype’ .

Additional material: 5 A F ( SNB 0057, 0706-0708), 11 A M ( SNB 0043, 0703-0705), 8 A, 2 (A-1), 1 RLV, 1 LV, EASIZ II, # 171. ZMH K- 40816;

1 A M ( SNB 0702), EASIZ II, # 310, ZMH K- 40817.

Distribution ( Fig. 34 View Figure 34 ): Recent. Davis, Weddell, and Scotia Seas , 186– 426 m.

Right valve measurements ( Fig. 34 View Figure 34 ): A F L 1.97– 2.16 mm, H 0.72–0.87 mm; A M L 2.00– 2.13 mm, H 0.76–0.88 mm; (A-1) L 1.62–1.70 mm, H 0.60– 0.64 mm.

Adult chaetotaxy: Antenna I 1(0/0), 2(0/.2)+3(.1/.1), 4(.1/.1), 5(.1/.1), 6(.2/.3), 7(0/0:4). Antenna II 1(0/.1:1), 2(0/0:0-1), Exopodite (0/0:2,1r), 3(0/.6.4), 4[female (.1r./.1r.1c,2)] [male (.1r./.1r.1c,2mod,1)], 5(0/1c,1:4c,1), 6(0/0:2c,2-3). Mandible 1(.1/0: 5t,+8), 2(0/.2:1), Exopodite (1r,7), 3(0/.4:3-4), 4(.3-4.2/.2-4), 5(0./0:1- 3c,2-3). Maxilla I vibratory plate (2strahlen,+20), palp 1(.1/0), 2(.4-5/0), 3(0/0:6). Appendage V 1(0/0:1.0-1.0- 1), Exopodite (0/0:7-10), [female 2(0/0), 3(0/0), 4(0/.1), 5(.1./0:1c,1)] [male 2(.1r/2mod,1:1r), 3(0/0:1mod)]. Appendage VI 1(.1-2./0), 2(.2.1./.1), 3(.1/0), 4(.1/0), 5(.1,1r/0), 6(0/0:1,2c). Appendage VII 1(0/0:0-1), 2(.1.1.1/.1.), 3(.1/0), 4(.1/0), 5(.2/0), 6(0/0:2,1mod). Furca (0/0:1,2r).