Terebellides kongsrudi, Parapar & Capa & Nygren & Moreira, 2020

Parapar, Julio, Capa, Maria, Nygren, Arne & Moreira, Juan, 2020, To name but a few: descriptions of five new species of Terebellides (Annelida, Trichobranchidae) from the North East Atlantic, ZooKeys 992, pp. 1-58 : 1

publication ID

https://dx.doi.org/10.3897/zookeys.992.55977

publication LSID

lsid:zoobank.org:pub:0F038B5B-120E-4583-8E85-4092C9798566

persistent identifier

https://treatment.plazi.org/id/541890B5-C55E-4716-BB42-0D87E7184885

taxon LSID

lsid:zoobank.org:act:541890B5-C55E-4716-BB42-0D87E7184885

treatment provided by

ZooKeys by Pensoft

scientific name

Terebellides kongsrudi
status

sp. nov.

Terebellides kongsrudi sp. nov. Figs 1 View Figure 1 , 2 View Figure 2 , 3C View Figure 3 , 4C View Figure 4 , 8C View Figure 8 , 9 View Figure 9 , 11 View Figure 11 , 12 View Figure 12 , 17B View Figure 17 , 28A View Figure 28 ; Table 1; Suppl. material 1: Table S1; Suppl. material 2: Table S2

Species 13 - Nygren et al. 2018: 18-22, figs 6, 10.

Material examined.

Type material. Holotype: GNM14632. Paratypes (20 specs): Barents Sea (ZMBN116409, ZMBN116411, ZMBN116414); Norwegian coast and shelf (ZMBN116412, ZMBN116413, ZMBN116415, ZMBN116416, ZMBN116417, ZMBN116418, NTNU-VM66568, NTNU-VM66570, NTNU-VM66571, NTNU-VM66572, NTNU-VM68195, NTNU-VM72560, NTNU-VM72561, NTNU-VM72562, NTNU-VM72563); Skagerrak (GNM15136, GNM14632, GNM14638).

Holotype. Complete specimen, 50.0 mm long and 5.0 mm width (Figs 3C View Figure 3 , 4C View Figure 4 ).

GenBank accession numbers of material examined (COI).

Paratypes: MG025201, MG025202, MG025203, MG025204, MG025210, MG025211, MG025212, MG025214, MG025216, MG025217, MG025218, MG025219, MG025223. Additional material: MG025199, MG025200, MG025205, MG025206, MG025207, MG025208, MG025209, MG025213, MG025215, MG025220, MG025221, MG025222, MG025224.

Diagnostic features of type material.

Complete individuals 12.0-50.0 mm in length (Fig. 17B View Figure 17 ). Branchial dorsal lobes lamellae without papillary projections. Ventral branchial lobes hidden in between dorsal ones (Figs 3C View Figure 3 , 4C View Figure 4 , 11A-C View Figure 11 ). Lateral lappets and dorsal projection of thoracic notopodia on TC2(3)-TC5(4) (Fig. 11A View Figure 11 ). Geniculate chaetae in TC6, acutely bent, with low marked capitium (Fig. 12A, B View Figure 12 ). Two pairs of nephridial pores in TC4 and TC5 and ciliated papilla dorsal to thoracic notopodia (Fig. 11D, E View Figure 11 ). Thoracic uncini in one row with rostrum/capitium length ratio approximately 2: 1 and capitium with a first row of 2-5 medium-sized teeth, followed by several smaller teeth (Fig. 12C-E View Figure 12 ). Abdomen with 25-35 uncinigers (Fig. 12F View Figure 12 ) with type 1 uncini (Figs 12G View Figure 12 , 28A View Figure 28 ).

Nucleotide diagnostic features.

All sequences of T. kongsrudi sp. nov. share the unique apomorphic nucleotides in positions 300 (G) and 624 (G) of our alignement.

Type locality.

Skagerrak; 429-445 m deep (Fig. 8C View Figure 8 ; Suppl. material 1: Table S1).

Distribution and bathymetry.

Barents Sea, Greenland Sea, along the Norwegian coast and shelf, reaching the Skagerrak to the South; 108-534 m deep ( Nygren et al. 2018) (Figs 8C View Figure 8 , 9 View Figure 9 ; Suppl. material 1: Table S1).

Etymology.

This species is named after Dr. Jon Anders Kongsrud, Department of Natural History, Zoological Museum Bergen-ZMB (Norway), housing institution of some of the specimens used in the present study, for his dedication to the study of Norwegian polychaetes and his friendship.

Remarks.

This is a large species reaching up to 50.0 mm long, and is characterised by the presence of ciliated papilla dorsal to thoracic notopodia, lack of papillae on the margins of branchial lamellae, thoracic uncini of type 3 and abdominal uncini of type 1. These features are also shared by species 12 (sensu Nygren et al. 2018), which will be described elsewhere (Gaeva and Jirkov, pers. comm.). Terebellides kongsrudi sp. nov. is also morphologically similar to T. bakkeni sp. nov. (see above) but T. kongsrudi sp. nov. and species 12 show a wider geographic distribution; on the contrary, species 12 is present at shallower depths (<200 m) while T. kongsrudi sp. nov. extends to deeper depths (>500 m).

Finally, in the 26 sequences belonging to this species (see Suppl. material 2: Table S2), there were fourteen haplotypes showing 0-1.9% of intraspecific divergence, and a minimum of 8.2% uncorrected genetic distance with members of species 12 which is the closest relative (sensu Nygren et al. 2018).