dcsimg

Description

provided by NMNH Antarctic Invertebrates

"Empoulsenia pentathrix (Komicker) FIGURES 309-313

Philippiella pentathrix Kornicker, 1971, figs. 26-28.

HOLOTYPE—USNM 125483, gravid female.

TYPE-LOCALITY—Greenwich Island, South Shetland Islands, Antarctica.

MATERIAL—USNM 125496, gravid female; USNM 125842, gravid female; USNM 125843, juvenile male, stage III, length 1.42 mm, height 0.84 mm; USNM 125971, N-l female, length 2.08 mm, height 1.10 mm; USNM 125978, juvenile male, instar ?IV, length 1.89 mm, height 1.02 mm; USNM 128959, gravid female + 1 juvenile; USNM 136581, gravid female; USNM 137109, adult female; USNM 137253, adult or late instar with distorted shell, length 2.09 mm, height 1.22 mm; USNM 137256, juvenile female, length 1.30 mm, height 0.73 mm; USNM 138162, 1 gravid female; USNM 138651, 1 gravid female.

USNM 125496 from Eltanin Cruise 12, station 1082; USNM 125842, 125843 from Eastwind station 004 A; USNM 125971 from Deep Freeze II, USS Staten Island, station 17; USNM 125978 from Deep Freeze IV, USS Edisto, station 14, sample TD-2; USNM 128959 from Vema Cruise 17, station V-17-53; USNM 136581 from Eltanin Cruise 32, station 1996; USNM 137109 from Vema Cruise 17, station V-17-66; USNM 137253 from Vema Cruise 17, V-17-46; USNM 137256 from Vema Cruise 17, V-17-59; USNM 138162 from Chilean Antarctic Expedition XXIV, Yelcho station 70-39; USNM 138165 from Chilean Antarctic Expedition XXIII, Hero station 69-42.

In addition, the following specimens collected on Chilean Antarctic Expeditions were identified and returned to the Instituto Central de Biologfa, Chile: XXIV, Hero station 70-39, 1 gravid female; XXIII, Hero station 70-40, 1 gravid female, 4 adult females without eggs; XXIII, Hero station 69-42, 3 gravid females, 3 adult females without eggs; XXIII, Hero station 69-47, 1 gravid female, 1 juvenile; XXIII, Hero station 69-37, 1 adult female without eggs; XXII, Yelcho station 57, 1 N-l female, length 2.11 mm, height 1.14 mm.

DIAGNOSIS OF FEMALE—Carapace with curving ventral and dorsal margins; posterior infold with 5 short processes between list and posterior shell margin; carapace length 2.19-2.49 mm, height 1.24-1.45 mm.

Mandible: Dorsal margin of basale with 5 short bristles forming row.

Maxilla: Similar to that of E. quinquesetae.

Sixth limb: Anterior margin with 1 upper and 1 lower bristle; end joint with 5 anterior bristles including 2 on lateral sole, and 20 or 21 posteroventral bristles.

Seventh limb: Each limb with 18 bristles.

Lateral eyes: Small with 3 ommatidia.

Posterior: Similar to that on E. quinquesetae.

SUPPLEMENTARY DESCRIPTION OF ADULT FEMALE—

Infold: see Figures 309a-c, 310.

Size: USNM 125496, length 2.25 mm, height 1.31 mm; USNM 125842, length 2.20 mm, height 1.27 mm; USNM 128959, length 2.49 mm, height 1.40 mm; USNM 136581, length 2.49 mm. height 1.45 mm; USNM 138162, length 2.37 mm, height 1.41 mm; USNM 138651, length 2.42 mm, height 1.38 mm; gravid female from Hero station 70-40, length 2.19 mm, height 1.34 mm; adult female without eggs from Hero station 70-40, length 2.29 mm, height 1.35 mm; gravid female from Hero station 69-47, length 2.28 mm, height 1.33 mm; adult female without eggs from Hero station 69-37, length 2.24 mm, height 1.32 mm.

Central muscle attachments: See Figure 309d,e.

Number of eggs in marsupium: USNM 125842, 8; USNM 128959, 10; USNM 136581, 1; USNM 138162, 4; USNM 138651, 8; specimen from Hero station 70-40, 9 eggs; specimen from Hero station 69-47, 11 eggs.

DISTRIBUTION—This species was collected in the Subantarctic and Antarctic regions of the American and Pacific Quadrants at shelf to bathyal depths (40-1511 m)." (Kornicker 1975b, p.502-509)

Habitat

provided by World Register of Marine Species
BENTHIC
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WoRMS Editorial Board
bibliographic citation
Louis S. Kornicker, 1993. Antarctic and Subantarctic Myodocopina (Ostracoda). In: Wägele JW and Sieg J. Synopses of the Antarctic Benthos, Vol5. Koenigstein, Koeltz Scientific Books
contributor
Danis, Bruno, B.
contributor
Danis, Bruno, B.