Bathycrinus longipinnus Mironov 2019, n. sp.
Bathycrinus longipinnus n. sp. Figs 4 A–J, 5A–H, 6A–K Synonymy: Bathycrinus sp. A — Belyaev 1966: 119; Bathycrinus sp. E — Belyaev 1966: 119. Etymology: The species name is derived from the Latin longus (long) and pinna (feather), in reference to long pinnule. Holotype. IO RAS, No. XV-63-7, RV Vitya...
| Main Author: | |
|---|---|
| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2019
|
| Subjects: | |
| Online Access: | https://zenodo.org/record/5587061 https://doi.org/10.5281/zenodo.5587061 |
| Summary: | Bathycrinus longipinnus n. sp. Figs 4 A–J, 5A–H, 6A–K Synonymy: Bathycrinus sp. A — Belyaev 1966: 119; Bathycrinus sp. E — Belyaev 1966: 119. Etymology: The species name is derived from the Latin longus (long) and pinna (feather), in reference to long pinnule. Holotype. IO RAS, No. XV-63-7, RV Vityaz, St. 3340, RR-ring with arms, RRD 4.16 mm. Type locality. RV Vityaz, cruise 20, St. 3340, TS, 0 1.06.1955, Aleutian Trench, 53°53.2′ N, 166°55.6′ E, 6410– 6757 m. Material examined. RV Vityaz, cruise 20, St. 3340, TS, 0 1.06.1955, Aleutian Trench, 53°53.2′ N, 166°55.6′ E, 6410–6757 m, holotype, 6 RR-rings with arms (paratypes), IO RAS Cat. no. Ech00751–Ech00755, RRD from 1.65 to 4.67 mm, fragments of arms and stalks; RV Vityaz, cruise 23, St. 3593, TG, 22.05 1957, Japan Trench, 40°54.9′ N, 144°53.0′ E, 6380 m, aboral cup with arms and RR-ring with proximal arms and stalk (paratypes), IO RAS Cat. no. Ech00756; RRD 1.87 and 2,48 mm. RV Akademik Mstislav Keldysh, cruise 22, St. 2294, TS, 25.07.1990, Aleutian Trench, 54°52.8′ N, 165°42.7’E – 54°52.2′ N, 165°36.4′ E, 6856–6865 m, RR-ring with arms, RRD 2.40 mm), IO RAS Cat. no. Ech00757; RV Sonne, KuramBio II expedition, St. 43, AGT, 30.08.2016, Kuril-Kamchatka Trench, 45°38.51′ N, 152°56.77′ E – 45°39.36′ N, 152°58.38′ E, 7241–7245 m, 4 RR-ring with arms, RRD 2.93–3.69 mm, SMF. Total: 13 RR-rings with arms, 1 aboral cup with arms and stalk, fragments of arms and stalks; RRD from 1.65 to 4.67 mm. Description of the holotype (Figs 4 A–E; 5A). RR-ring slightly funnel-shaped (Figs 4A, 5A); RRH/RRD 0.48. Surface of RR smooth. Tegmen rising to top of Br2–middle of Br3. Sides of tegmen without plates. Height of primibrachitaxis (IBr1+2ax) 4.35 mm. Ratio IBr1H/RRH 1.21, IBr1H/Br2H 1.26, IBr1H/Br1W 1.07, Br2H/Br2W 0.69. IBrs 1–2 with smooth surface and low longitudinal median convexity; their sides flattened into wide lateral flanges continuing on to secundibrachs up to Br5. Five calcite plaques (outgrowths) on interradial sutures between RR and IBr1; each plaque lies on upper ... |
|---|