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Classification


Geographic Distribution

Antarctic Convergence illustration Antarctic convergence

Bathymetric Specimen Dispersal

49 individual specimens found for Astochoporella cassidula.

Astochoporella cassidula   Species

Synonymy

Original Description
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Original Description
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"Astochoporella cassidula nom. nov. (Fig. 4 E, F)

Pemmatoporella marginata: Hayward and Taylor 1984: 76, Fig. 2A, B.
Material
Holotype BMNH 1987.9.20.16, "Discovery" stn. 1652, 23.1.1936, 567 m.

Description
Autozooids elongate, rectangular, flat, separated by thin, raised sutures. Frontal wall finely granular, with well marked marginal septula, interspersed with thickened, nodular ridges. Aperture relatively large, slightly wider than long, its proximal border straight, slightly convex or sometimes with a distinctly angular lip simulating a lyrula. Avicularium situated close to proximal edge of aperture; elongate oval, with the rostrum slightly uplifted distally. Ovicell a short hemisphere, about as long as aperture, not very protuberant; with relatively large, irregular foramen in ectooecium; granular ooecial cover developing in early ontogeny.
Measurements, means and standard deviations of 20 values, mm: Autozooid length 1.84 ± 0.01 Aperture length 0.32 ± 0.04 Autozooid width 0.90 ± 0.04 Aperture width 0.41 ± 0.02

Geographical distribution
The material figured by Hayward and Taylor (1984) was from the Ross Sea. The present material consists of eight samples, one from the Palmer Archipelago ("Discovery" stn. 190), and the rest from the Ross Sea (National Antarctic Expedition, Coulman Isd., "Terra Nova" stns. 295, 316, 339, 355; "Discovery" stns. 1652, 1660)." (Hayward and Thorpe, 1988b:292)

Geographic Distribution

Ross Sea, Palmer Archipelago

Specimens

Displaying 10 of 49 Specimens

Type Status Catalog No. Date Collected Location Coordinates Depth (m) Vessel
  17567 3/15/1964 Antarctic Ocean 62.7° S, 54.7° W 210 – 220 Eltanin R/V
  17572 3/1/1973 Antarctic Ocean 65.99° S, 65.86° W 70 – 130 Hero R/V
  17608 2/24/1973 Antarctic Ocean 65.5° S, 67.5° W 180 Hero R/V
  18371 2/22/1976 Scotia Sea 61.29° S, 44.48° W 283 – 305 Islas Orcadas R/V
  19021 12/1/1958 Antarctic Ocean 74.42° S, 167.01° E 732 Glacier R/V
  19667 1/26/1967 Ross Sea 75.5° S, 178.8° W 474 – 496 Eltanin R/V
  19938 2/16/1981 Antarctic Ocean 65.24° S, 64.22° W 380 – 400 Hero R/V
  19939 3/1/1972 Antarctic Ocean 64.04° S, 64.11° W 60 – 90 Hero R/V
  19940 2/23/1972 Antarctic Ocean 64.79° S, 64.11° W 73 – 128 Hero R/V
  20103 2/8/1969 Antarctic Ocean 65.6° S, 67.3° W 161 Hero R/V

Displaying 10 of 49 Specimens

View additional taxa  View all species collected at same locations as Astochoporella cassidula