Grigelis pyrula ( d’Orbigny, 1826 )

Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, European Journal of Taxonomy 824 (1), pp. 1-74 : 34-35

Grigelis pyrula ( d’Orbigny, 1826)

Fig. 8

Nodosaria pyrula d’Orbigny, 1826: 253 , nr. 13.

Nodosaria mariae d’Orbigny, 1846: 33 , pl. 1 figs 15–16.

Grigelis pyrula – Mikhalevich 1981: 39, fig 3b ( Grigelis gen. n. in figure text p. 25).

Nodosaria pyrula – Papp & Schmid 1985: 24 (nr. 8), pl. 4 figs 2–3.

Material examined

BARENTS SEA • 3; 68.5897° N, 13.7158° W; large Van Veen grab; depth 142 m; unknown; unknown; 18 Jun. 2008; MAREANO-2008104 R243-36 A; IINH 40400 • 4; 68.5897° N, 13.7158° W; large Van Veen grab; depth 142 m; unknown; unknown; 18 Jun. 2008; MAREANO-2008104 R243-37 B; IINH 40401 .

ICELANDIC WATERS • 1; 63.72° N, 24.4217° W; RP sledge; depth 209 m; 6.98°C; 35.11 ppt; 4 Sep. 1992; BIOICE 2233 ; IINH 40399 • 1; 63.0417° N, 21.8556° W; detr. sledge (Sneli); depth 802 m; 5.49°C; 35.03 ppt; 1 Jul. 1993; BIOICE 2404 ; IINH 40392 • 1; 63.1742° N, 20.165° W; RP sledge; depth 495 m; 6.46°C; 35.08 ppt; 3 Jul. 1993; BIOICE 2424 ; IINH 40388 • 1; 66.6094° N, 23.9836° W; detr. sledge (Sneli); depth 226 m; 5.61°C; 35.01 ppt; 13 Jul. 1993; BIOICE 2526 ; IINH 40397 • 1; 64.575° N, 24.5222° W; detr. sledge (Sneli); depth 250 m; 6.15°C; 35.06 ppt; 6 Sep. 1994; BIOICE 2712 ; IINH 40393 • 1; 63.2511° N, 17.8528° W; RP sledge; depth 206 m; 7.18°C; 35.14 ppt; 25 Aug. 1995; BIOICE 2818 ; IINH 40398 • 1; 63.4183° N, 16.8444° W; RP sledge; depth 272 m; 7.21°C; 35.15 ppt; 25 Aug. 1995; BIOICE 2830 ; IINH 40396 • 1; 65.1333° N, 23.6° W; Triangle dredge; depth 121 m; 7.97°C; 34.93 ppt; 30 Aug. 1996; BIOICE 2965 ; IINH 40437 • 6; 65.1336° N, 23.6047° W; RP sledge; depth 120 m; 7.97°C; 34.93 ppt; 30 Aug. 1996; BIOICE 2966 ; IINH 40390 • 1; 65.0433° N, 25.8742° W; RP sledge; depth 163 m; 6.34°C; 35.06 ppt; 30 Aug. 1996; BIOICE 2976 ; IINH 40394 • 1; 64.9225° N, 25.7775° W; Triangle dredge; depth 183 m; 6.22°C; 35.06 ppt; 30 Aug. 1996; BIOICE 2978 ; IINH 40395 • 1; 64.92° N, 25.5167° W; RP sledge; depth 168 m; 6.42°C; 35.06 ppt; 30 Aug. 1996; BIOICE 2981 ; IINH 40391 • 4; 63.9969° N, 14.1558° W; RP sledge; depth 221 m; 7.59°C; 35.16 ppt; 10 Jul. 1997; BIOICE 3061 ; IINH 40389 • 1; 63.7567° N, 25.7097° W; RP sledge; depth 366 m; 7.1°C; 35.15 ppt; 11 Sep. 2003; BIOICE 3608 ; IINH 40387 .

Description

Test shape elongate, nearly straight to slightly curved, strongly nodular, barely tapering, or successive chambers are of equal diameter, except the proloculus which is often largest. Length of test fragments 2–4 mm, the largest 8 mm; test width 0.15–0.25 mm. Chambers pear-shaped, rectilinearly arranged, embracement minimal; chambers attached at the very end of a long apertural neck; number of chambers unknown, the largest fragment has 11 chambers. Proloculus often larger than later chambers. Sutures horizontal. Aperture radial, central and protruding, at the end of a long neck, with up to 12 symmetrical tines, that are fused in center. Surface smooth, except for short longitudinal costae extending for about one third to half of the upper part of the apertural neck; initial end pointed or with long spine. Secondary surface laminations absent. Wall transparent of medium thickness, finely perforated.

Remarks

The 29 examined specimens were all fragments, of which four had a proloculus. The top of the aperture is commonly damaged, exposing a circular, crenulated opening.

Figures

Fig. 8. Grigelis pyrula (d’Orbigny, 1826). A–B. Specimen with missing initial end (BIOICE 2424, IINH 40388), side view (A) and detail of aperture (B), stained with indigo blue. C. Megalospheres (BIOICE 2966, IINH 40390), initial ends of specimens with damaged apertures. Light source combination of incident light and dark field. Scale bars = 0.25 mm.