Errinopsis fenestrata Cairns 1983

• Main Authors: Cairns, Stephen D., Zibrowius, Helmut
• Format: Other/Unknown Material
• Language: unknown
• Published: 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Anthoathecata; Stylasteridae; Errinopsis; Errinopsis fenestrata; Drake Passage
• Online Access: https://zenodo.org/record/5619741; https://doi.org/10.5281/zenodo.5619741

Errinopsis fenestrata Cairns, 1983 Figs. 9 A–I, 22 Errinopsis fenestrata Cairns, 1983 a: 80 –82, figs. 1 I, 10 A–G; 1983 b: 428 (listed).—Cairns & MacIntyre, 1992: 98–99 (mineralogy).—Cairns, 2011: fig. 7 A. Types and Type Locality. The type series is deposited primarily at the NMNH, with vouchers also at the Naturalis Biodiversity Centre and BM (see Cairns 1983 a). Type Locality: 59 ° 49.4 ’S, 68 ° 51.7 ’W (seamount in Drake Passage), 280– 340 m. Material Examined. PF 13479, 1 colony, exSAM 2817; 32 ° 27.2 ’S, 28 ° 55.9 ’E, 250 m, coll. William Rune Liltved, 12 July 1984, 1 colony and SEM stub 1672 (USNM 1189354); RV Seidlecki 601, 53° 20 ’S, 42 ° 42 ’W, 417– 514 m, 1 colony, USNM 83591; type material. Diagnosis. Colonies uniplanar and small (less than 11 mm in height), not yet forming anastomosing branchlets; branchlets rectangular in cross section, the longer axis perpendicular to plane of colony; coenosteal modification caused by commensal polychaete present. Coenosteal texture linear-granular (Fig. 9 C–E), the strips being 52–90 µm in width and fairly smooth, covered with small (6 µm) sparse granules; coenosteum around and composing dactylopore spines imbricate (Fig. 9 F); coenosteum light orange. Gastropores round (0.21–0.23 mm in diameter), occurring on anterior face and at branch axils; gastropore tubes cylindrical, without a ring palisade; gastropores bordered with a wide abcauline lip (Fig. 9 B), which usually bears several dactylopore spines. Gastrostyle base thick and finely ornamented, capped by a coarsely ridged apical tip. Dactylopore spines dimorphic, one type consisting of short apically perforate cones (Figs. 9 C, E), the pore being 27–33 µm in diameter, the second type being taller (up to 0.25 mm), slender (0.11–0.13 mm), cylindrical projections (Fig. 9 D, F), usually with an pore or slit on its lower side, but not horseshoe-shaped as in Errina. Ampullae (?female) superficial and spiny due to coverage with dactylopore spines. Remarks. Only a diagnosis is given above, as there is a complete ...