Hyalopomatus jirkovi Kupriyanova 1993
Description
Hyalopomatus jirkovi Kupriyanova, 1993a
(Fig. 5 A–B, H)
Hyalopomatus jirkovi Kupriyanova, 1993a: 147 –148, fig. 1.
Material examined. Type material. SIO: R/V “ Vityaz ” Stn. 5593, 45 °38’N, 152°02’E, 1050 m, 12 Aug 1966 (holotype and paratype).
Newly examined material. SIO: R/V “ Vityaz ” Stn. 4131, 55 º47.6’N, 145º19.7’W, 3949 m, trawl, 9 Nov 1958 (4 specs).
Description. Tube: Tubes white, smooth, attached to the Cidaris throughout its length, circular in cross-section, some indication of interruptions in calcium carbonate secretion (see Sanfilippo 2009) along the tube.
Branchial crown: 8–10 pairs of radioles, not joined by inter-radiolar membrane. Bases of branchial radioles short. Branchial eyes not visible in preserved material. Stylodes absent.
Peduncle: inserted as 1st dorsal radiole on left side of crown, thin, smooth, circular in cross-section. Constriction present. Pair of lateral wings proximal to opercular bulb and pseudoperculum absent.
Operculum: semi-transparent elongated vesicle with slightly differentiated darker distal cap (Fig. 5 H).
Collar and thoracic membranes: collar four-lobed, with ventral lobe additionally sub-divided into two round lobes by a deep incision; ventro-lateral lobes twice as long as latero-dorsal lobes (Fig. 5 A, B). Thoracic membranes reaching up to 3rd chaetiger, of even width throughout (Fig. 5 A, B).
Thorax: with six thoracic chaetigers, five of which uncinigerous (Fig. 5 A, B). Collar chaetae simple capillaries and special fin-and-blade chaetae, with wide blade continuing without a gap in proximal fin made of numerous small teeth. Remaining notochaetae with short wide distal limbate blade. Apomatus chaetae absent. Thoracic uncini rasp-shaped, with about 20 teeth in profile view, arranged in 3–4 transverse rows, and with elongated and flattened anterior peg (SEM details of peg structure not available).
Abdomen: abdominal uncini similar to thoracic uncini but smaller with about 20 teeth in profile view. Straight, almost capillary (distal limbation very narrow) abdominal chaetae (SEM details not available).
Colour: unknown.
Remarks. This is the second record of this species previously known only from two specimens (the type material) collected from the Kurile-Kamchatka Trench. Hyalopomatus jirkovi clearly differs from all described species of Hyalopomatus by the structure of the collar with ventral lobe sub-divided into two lobes by deep incision at midline.
Distribution. Kurile-Kamchatka Trench, Gulf of Alaska, 1050–3949 m.
Notes
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Linked records
Additional details
Identifiers
Related works
- Cites
- Figure: 10.5281/zenodo.203389 (DOI)
- Is part of
- Journal article: 10.5281/zenodo.203385 (DOI)
- Journal article: http://publication.plazi.org/id/B813E31B3B03832FFF9AFFC9C807FFA4 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/442A9B633B0E8321FF0DF9F0CBF6FC99 (URL)
Biodiversity
- Family
- Serpulidae
- Genus
- Hyalopomatus
- Kingdom
- Animalia
- Order
- Sabellida
- Phylum
- Annelida
- Scientific name authorship
- Kupriyanova
- Species
- jirkovi
- Taxon rank
- species
- Taxonomic concept label
- Hyalopomatus jirkovi Kupriyanova, 1993 sec. Kupriyanova, Bailey-Brock & Nishi, 2011
References
- Kupriyanova, E. K. (1993 a) Deep-water Serpulidae (Annelida, Polychaeta) from the Kurile-Kamchatka Trench: 1. Genus Hyalopomatus. Zoologichesky Zhurnal, 72, 145 - 152. (In Russian).
- Sanfilippo, R. (2009) New species of Hyalopomatus Marenzeller, 1878 (Polychaeta, Serpulidae) from Recent Mediterranean deep-water coral mounds and comments on some congeners. Zoosystema, 31, 147 - 161.