Lumbrineridae sp. NHM_2146, 1828

Neal, Lenka, Abrahams, Emily, Wiklund, Helena, Rabone, Muriel, Bribiesca-Contreras, Guadalupe, Stewart, Eva C. D., Dahlgren, Thomas G. & Glover, Adrian G., 2023, Taxonomy, phylogeny, and biodiversity of Lumbrineridae (Annelida, Polychaeta) from the Central Pacific Clarion-Clipperton Zone, ZooKeys 1172, pp. 61-100 : 61

Lumbrineridae sp. NHM_2146

Fig. 2A-D

Material examined.

NHM_2146, NHM ANEA 2022.855, coll. 20 Mar. 2015, AB02, APEI6, EBS, 19.46457, -120.02542, 4026 m, https://data.nhm.ac.uk/object/2c8356c2-f64f-4a40-ac0b-292cfc5247b6.

Description.

This species is represented by a single sub-optimally preserved body fragment, 1.8 mm long and 0.4 mm wide for ~ 7 discernible chaetigers (Fig. 2A ). Parapodia indistinct, globular parapodial lobe visible on some parapodia (Fig. 2B, C ). Aciculae yellow. Chaetae characterised by winged limbate chaetae (Fig. 2C ), pseudo-compound multidentate hooded hooks (Fig. 2C, D ). No simple hooks visible on specimen, although posterior end is absent, and many chaetae are broken.

Genetic data.

This species falls in a strongly supported clade containing Augeneria species, suggesting it may belong to this genus (Fig. 3 ). There are no matches for this species on GenBank.

Remarks.

Due to the suboptimal quality of the single available specimen, we cannot identify this taxon beyond family level using morphology. Prostomium and jaws cannot be observed. Chaetae are characterised by winged limbate chaetae and hooks that appears to be pseudo-compound and multidentate. No simple hooks visible on specimen, although posterior end is absent, and many chaetae are broken. Molecular data suggest this species may belong to genus Augeneria (Fig. 3 ), but given the lack of morphological data, we cautiously assign this specimen to morphospecies Lumbrineridae sp. NHM_2146.

Distribution.

Central Pacific Ocean, Eastern CCZ, in the Area of Particular Environmental Interest, ‘APEI-6’ only (Fig. 1 ).

Figures

Figure 1. Map of CCZ of exploration areas and Areas of Particular Environmental Interest (APEI) with targeted areas (highlighted in colours; see legend) where samples for this study were collected.

Figure 2. Lumbrineridae sp. NHM _ 2146 A live image of body fragment of specimen NHM _ 2146 B winged limbate capillary chaetae C pseudo-compound multidentate hooded hook and winged capillaries D pseudo-compound multidentate hooded hook. Scale bars: 100 µm (B); 50 µm (C).

Figure 3. Majority rule consensus tree from the Bayesian analyses using combined datasets for COI, 16 S and 18 S genes, with 36 terminal taxa of which Tainokia logachevae (Oenonidae), Eunice rubra (Eunicidae) and Nothria conchylega (Onuphidae) were used as outgroup. Posterior probability values are marked on nodes.