Terebellides
- Dataset
- On the diversity of Terebellides (Annelida, Trichobranchidae) in West Africa, seven new species and the redescription of T. africana Augener, 1918 stat. prom.
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Annelida
- class
- Polychaeta
- order
- Terebellida
- family
- Trichobranchidae
- genus
- Terebellides
description
Description Measurements and general body features. Complete and well preserved specimen, 29 mm long and 2.5 mm wide (Fig. 35 A−B); body tapering posteriorly with segments increasingly shorter and crowded towards pygidium. Prostomium compact; very large tentacular membrane surrounding mouth, with typical buccal tentacles with expanded tips. SGI as an expanded structure below tentacular membrane. Lateral lappets on SGIII – VII (TC 1 – 5). Table 1. Locality and collecting data, museum registration numbers and reference to figures, of all Terebellides specimens described in this work. Country names and coordinates are copied from original museum labels. … continued on the next page Table 1. (continued) Table 1. (continued) NHMD- “ “ “ “ “ “ “ “ 1 “ paratypes 636926 MNCN 26 A – D, Congo 11 _ 2 this work N’Kossa 2003 5 ° 22.708 S 11 ° 27.627 E 545 1 – non-type; SEM 16.01 / 18591 27 A – D Kirkegaard Angola 135 Atlantide 17 - 03 - 1946 7 º 55 ’ S 12 º 38 ’ E 235 – 460 2 NHMD- 231437 – paratypes (1959) Kirkegaard “ 133 “ 1950 17 º 13 ’ S 11 º 27 ’ E 320 2 NHMD- 231448 - – paratypes 25 C (1959) Terebellides nkossa sp. nov. original new station- campaign / oil country reference date longitude latitude depth specs registration registration Remarks Figures sample field number number non-type; Kirgegaard Sierra Leone 51 Atlantide 31 - 1 - 1945 7 º 14 ’ N 12 º 57 ’ W 108 1 NHDM- 231434 – labelled as T. (1959) af. nkossa MNCN Gabon AYM 34 - 1 this work Ayol 2011 1 º 19.82 ’ 8 º 43.8 ’ 43 3 – paratype 16.01 / 18592 MNCN “ AYM 34 - 2 “ Ayol “ “ “ “ 3 – paratype 16.01 / 18593 MNCN “ AYM 34 - 2 “ Ayol “ “ “ “ 1 – holotype 28 A, 29 A 16.01 / 18594 MNCN “ AYM 35 - 1 “ Ayol “ 1 º 20.3 ’ 8 º 44.0 ’ 44 7 – paratype 29 B – C 16.01 / 18595 MNCN “ “ “ Ayol “ “ “ “ 1 – paratype; SEM 30 A – F 16.01 / 18596 MNCN “ AYM 35 - 2 “ Ayol “ “ “ “ 5 – paratype 16.01 / 18597 MNCN “ AYM 36 - 1 “ Ayol “ 1 º 20.6 ’ 8 º 44.1 ’ 44 4 – paratype 16.01 / 18598 MNCN “ AYM 36 - 2 “ Ayol “ “ “ “ 1 – paratype; SEM 32 A – D 16.01 / 18599 MNCN “ “ “ Ayol “ “ “ “ 5 – paratype 16.01 / 18600 MNCN “ AYM 37 - 1 “ Ayol “ 1 º 21.8 ’ 8 º 44.8 ’ 45 1 – paratype; SEM 31 A – F 16.01 / 18601 MNCN “ “ “ Ayol “ “ “ “ 1 – paratype 29 D 16.01 / 18602 MNCN “ “ “ Ayol “ “ “ “ 7 – paratype 16.01 / 18603 MNCN “ AYM 37 - 2 “ Ayol “ “ “ “ 7 – paratype 16.01 / 18604 Banc du MNCN “ BDP 55 - 1 “ “ 0 º 37.5 ’ 8 º 45.6 ’ 47 1 – paratype Prince 16.01 / 18605 … continued on the next page Terebellides sp. 2 original new station- campaign / oil country reference date longitude latitude depth specs registration registration Remarks Figures sample field number number Table 1. (continued) South Africa Kirkegaard (Off Cape 165 Galathea 03 - 01 - 1951 n. d. n. d. 110 1 NHMD- 231449 – dried out 35 C – D (1959) Point)
description
Figures 11 D, 35 A – B, 37; Tables 1, 2
discussion
Remarks. The specimen was not examined under SEM, preventing adequate observations of relevant characters (i. e., ciliation of branchial lamellae, teeth size and shape on thoracic uncini) and, thus, formal description. It is characterised by the great development of the tentacular membrane, a trait shared with T. californica and T. mediterranea which, in turn, differ from Terebellides sp. 1 in having long TC 1 notopodium and notochaetae, both smaller in this specimen. Terebellides resomari Lavesque, Hutchings, Daffe, Nygren & Londoño-Mesa, 2019 also shares this character, but differs from Terebellides sp. 1 in having papillar projections over the margin of the branchial lamellae and a well-developed fifth branchial lobe.
distribution
Distribution and bathymetry. Congo; 200 m depth (Fig. 11 D; Table 1).
materials_examined
Branchiae. Branchiae arising as single structure from SGIII, consisting of a single stalked mid-dorsal branch having one pair of dorsal (upper) lobes not fused along their length, and one pair of ventral (lower) lobes of same length, neither fused together nor to dorsal ones, arising from branchial stem. Anterior projection of dorsal lobes (lobe 5) small. Pointed projection of posterior region of both upper and lower lobes forming a short terminal papilla (Fig. 35 A−B). Thorax. Eighteen pairs of notopodia (SGIII−XX), with those in TC 1 smaller than subsequent ones. Neuropodia as sessile pinnules, from TC 6 (SGVIII) to pygidium, with uncini in single rows starting from TC 7 (SGIX) throughout. First neuropodia (TC 6) with eight sharply bent, acute-tipped, geniculate chaetae; second and subsequent neuropodia with up to 14 − 16 uncini per torus. Abdomen. Thirty-one pairs of neuropodia as erect pinnules, with ca. 25 uncini per torus. Other body features. A very small nephridial papilla behind first thoracic notopodia; two pairs of simple nephridial openings dorsal to each SGVI and VII (TC 4 and TC 5) notopodium. Pygidium blunt, as a funnel-like depression. Methyl green staining pattern. Anterior CH 1 to CH 3 solid; CH 4 to CH 18 striped; more pronounced in CH 4 to CH 11; near pattern 1 of Schüller & Hutchings (2010) (Fig. 37).
materials_examined
Material examined. One specimen (NHMD- 231440, Table 1).