AnimaliaNot EvaluatedacceptedspeciesAccepted

Euphrosinella georgievae

Neal, Wiklund, Gunton, Rabone, Bribiesca-Contreras, Dahlgren & Glover, 2022

GBIF:12186878

0year

PROFILE

Species Profile

Habitat

Marine

Characteristics

Extant

ABOUT

Descriptions(5)

Figs 13 A-G, 14 A-F, 15 A, 16 A-G

Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

Diagnosis. Holotype (NHMUK ANEA. 2022.664) complete (except for tissue sampled for DNA), 4.2 mm long and 1.1 mm wide without chaetae for 15 chaetigers (Fig. 13 A). Paratype (NHMUK ANEA. 2022.662) complete (except for tissue sampled for DNA), with 13 chaetigers (Fig. 14 A). Body short, oval, flattened, pale yellow in alcohol (Figs 13 A, 14 A). Prostomium longer than wide, with five prostomial appendages (Fig. 15 A). Pair of short slender palps (Figs 13 C, 14 C, D); pair of slender lateral antenna (Figs 13 C, 14 C, D); median antenna of caruncle with long thick ceratophore and slender cirrus only slightly longer than caruncle (Fig. 13 C). Caruncle as oval lobe reaching to anterior margin of chaetiger 4, mostly free of body wall, with median keel and two pairs of lateral ridges, with median keel slightly thicker than the lateral ones (Fig. 13 C, D). Eyes not observed. Parapodia biramous, two rami well separated. Parapodia of chaetiger 1 well developed, not reduced, with dorsal, lateral, and ventral cirri (Fig. 13 C). Parapodial appendages of subsequent chaetigers in the following dorsoventral order: dorsal cirrus, branchia, lateral cirrus, ventral cirrus (Fig. 15 C). All cirri as single filaments of various length and thickness with dorsal cirrus longest (extending over three chaetigers in midbody) (Figs 13 E, 14 E); lateral cirrus shorter and more stout inserted in the middle of notochaetal bundle (Fig. 13 E, F); ventral cirrus slightly shorter than lateral cirrus, slender. Branchia one per chaetiger, simple (unbranched) cirrus, inserted laterally to dorsal cirrus, very short (ca. 1 / 2 the length of mid body chaetiger) (Figs 13 E, F, 14 E, 15 C). All chaetae well developed, but prone to breakage, all bifurcate (Fig. 16 A). Notochaetae in approximately three tiers; differing mainly in their length and thickness with notochaetae of mid tear longest and thickest (Fig. 16 B-E); prongs mostly smooth (Fig. 16 B, C, E) or few with very faint serration (Fig. 16 D); ratio of short to long prong in the short chaetae of anterior tier ranges from 1: 3.5 - 4 (where possible to establish); in long chaetae of mid-tier ratio ranges from 1: 4 to 1: 5 (where possible to establish). Ringent notochaetae absent. Neurochaetae less numerous and thinner than notochaetae; all bifurcate, of varying lengths, prongs with noticeable serration (Fig. 16 F, G), few prongs appearing smooth. Pygidium with paired anal cirri, resembling cylindrical tube feet (Figs 13 G, 14 B, F).

Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

Distribution. Central Pacific Ocean, Eastern CCZ, the exploration areas UK- 1, OMS, and NORI-D (Fig. 1).

Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

Etymology. This species is named for Dr. Magdalena Georgieva, who took part in ABYSSLINE expeditions to CCZ. She also collected Bathychloeia cf. sibogae specimens from CCZ used in this study as well as samples from the South Pacific during the RV Investigator cruise used here as a comparative material.

Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

Material examined. NHM _ 0587, NHMUK ANEA 2022.658, coll. 17 / 02 / 2015, EBS, 12.38624, - 116.54867, 4202 m, UK- 1, http: // data. nhm. ac. uk / object / b 7 a 0 bf 33 - 0 dc 4 - 4 f 61 - 90 de- 35865647 a 99 f; NHM _ 0777, NHMUK ANEA 2022.659, coll. 20 / 02 / 2015, EBS, 12.38624, - 116.54867, 4202 m, UK- 1, http: // data. nhm. ac. uk / object / a 8 f 0 e 776 - d 7 b 6 - 4 ec 6 - a 549 - 78 f 40 f 17 d 89 b; NHM _ 1737 B, NHMUK ANEA 2022.660, coll. 11 / 03 / 2015, EBS, 12.17383, - 117.19283, 4045 m, OMS, http: // data. nhm. ac. uk / object / 2784 df 45 - eec 0 - 4151 - b 12 d- 11 d 955985 faa; NHM _ 0910, NHMUK ANEA 2022.661, coll. 23 / 02 / 2015, EBS, 12.57133, - 116.6105, 4198 m, UK- 1, http: // data. nhm. ac. uk / object / 05 dfb 32 c-fc 3 a- 4028 - bf 09 - 3 eb 840175661; NHM _ 1134 (paratype), NHMUK ANEA 2022.662, coll. 26 / 02 / 2015, EBS, 12.1155, - 117.1645, 4100 m, OMS, http: // data. nhm. ac. uk / object / 00590 d 2 b-f 952 - 4 c 69 - 8 bc 2 - ac 2 a 408 da 17 a; NHM _ 1514, NHMUK ANEA 2022.663, coll. 05 / 03 / 2015, EBS, 12.51316667, - 116.491333, 4252 m, UK- 1, http: // data. nhm. ac. uk / object / 96 cb 7 b 69 - c 0 ea- 4559 - 9 b 57 - 3 abe 6 af 4 a 4 c 7; NHM _ 2391 (holotype), NHMUK ANEA 2022.664, coll. 20 / 02 / 2015, EBS, 12.53717, - 116.60417, 4425 m, UK- 1, http: // data. nhm. ac. uk / object / 1 ce 8325 f- 74 de- 47 de-a 776 - 2 dc 50 b 8 d 69 ae; NHM _ 4975, NHMUK ANEA 2022.665, coll. 28 / 10 / 2020, box core, 11.013923, - 116.258737, 4234 m, NORI-D, http: // data. nhm. ac. uk / object / 677 b 7 d 67 - d 9 cc- 4 ebd- 8 d 79 - cf 5 da 5 dc 40 da; NHM _ 6087, NHMUK ANEA 2022.666, coll. 14 / 11 / 2020, box core, 10.647709, - 117.226887, 4183 m, NORI-D, http: // data. nhm. ac. uk / object / eebfaecd- 5 ee 2 - 49 d 6 - be 73 - 51 eb 91678487; NHM _ 5802, NHMUK ANEA 2022.667, coll. 11 / 10 / 2020, box core, 10.475094, - 117.384872, 4306 m, NORI-D, http: // data. nhm. ac. uk / object / c 0 e 408 e 3 - 91 e 7 - 408 f-aaef- 3 be 86507105 a; NHM _ 5057, NHMUK ANEA 2022.668, coll. 30 / 10 / 2020, box core, 10.929036, - 116.26351, 4262 m, NORI-D, http: // data. nhm. ac. uk / object / d 92 b 1574 - eccb- 443 c-a 15 d-b 79357360 b 59; NHM _ 7235, NHMUK ANEA 2022.669, coll. 14 / 05 / 2021, box core, 10.3773, - 117.1558, 4302 m, NORI-D, http: // data. nhm. ac. uk / object / 55637 dc 0 - f 9 b 9 - 4586 - 9 bfb- 7 a 821 c 785279; NHM _ 2908, NHMUK ANEA 2022.670, coll. 20 / 02 / 2015, EBS, 12.53717, - 116.60417, 4425 m, UK- 1, http: // data. nhm. ac. uk / object / fba 3 fab 7 - ae 4 b- 4415 - a 73 c-a 2 ba 6 cd 44601.

Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

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CLASSIFICATION

Taxonomic Classification Tree

AnimaliaAnnelidaPolychaetaAmphinomidaEuphrosinidaeEuphrosinellaEuphrosinella georgievae

Animalia2,981,931

Annelida41,152

Polychaeta22,832

Amphinomida367

Euphrosinidae75

Euphrosinella3

Euphrosinella georgievae

Related Name Usages(6)

Matching names from other GBIF-indexed checklists and datasets.

Euphrosinella georgievaeNeal, Wiklund, Gunton, Rabone, Bribiesca-Contreras, Dahlgren & Glover, 2022

acceptedspecies

Euphrosinella georgievae

acceptedspecies

Euphrosinella georgievaeNeal, Wiklund, Gunton, Rabone, Bribiesca-Contreras, Dahlgren & Glover, 2022

acceptedspecies

Euphrosinella georgievaeNeal, Wiklund, Gunton, Rabone, Bribiesca Contreras, Dahlgren & Glover, 2022

Neal, Lenka, Helena Wiklund, Laetitia M. Gunton, Muriel Rabone, Guadalupe Bribiesca Contreras, Thomas G. Dahlgren & Adrian G. Glover. 2022. Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida). ZooKeys 1137: 33-74.

acceptedspecies

Euphrosinella georgievaeNeal, Wiklund, Gunton, Rabone, Bribiesca-Contreras, Dahlgren & Glover, 2022

acceptedspecies

MULTIMEDIA

Media Files(6)

Figure 1. Map of CCZ of exploration areas and areas of particular interest, with targeted areas where samples of this study were collected highlighted in colours (see legend for explanation).

Imageimage/png© Neal, Lenka;Wiklund, Helena;Gunton, Laetitia M.;Rabone, Muriel;Bribiesca-Contreras, Guadalupe;Dahlgren, Thomas G.;Glover, Adrian G.Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida)

Figure 5. Majority-rule consensus trees from the Bayesian analyses with posterior probability values on nodes. Taxon names highlighted in blue are news species or new sequences for already known species. A Amphinomidae phylogenetic tree using a combined datasets for COI, 16 S, and 18 S with 26 terminal taxa of which Euphrosine foliosa (Euphrosinidae) was used as a root B Euphrosinidae phylogenetic tree using a combined datasets for 16 S and 18 S with nine terminal taxa of which Paramphinome jeffreysii (Amphinomidae) was used as a root.

Figure 13. Euphrosinella georgievae sp. nov. (holotype, NHMUK ANEA 2022.664) A preserved specimen in lateral views B specimen stained with Shirlastain in lateral view C, D detail of anterior end and prostomium with palps (P), lateral antennae (La), median antenna (Ma), caruncle (Car) and first chaetiger - dorsal cirrus (Dc), lateral cirrus (Lc) and ventral cirrus (Vc) marked by arrows E, F midbody chaetigers in dorsal view with branchiae (Br), dorsal (Dc) and lateral cirri (Lc) marked by arrows G pygidium in distal view. Scale bars: 1 mm. Abbreviations: Ma - median antenna, La - lateral antennae, P - palps, Vc - ventral cirrus, Lc - lateral cirrus, Dc - dorsal cirrus, Car - caruncle, Br - branchiae.

Figure 14. Euphrosinella georgievae sp. nov. (paratype NHMUK ANEA. 2022.662) A preserved specimen in dorsolateral view B specimen stained with Shirlastain, in dorsolateral view C detail of anterior end in dorsolateral view D detail of prostomium, with palps and lateral antennae E dorsal view of midbody chaetigers, showing branchiae and dorsal cirri F detail of pygidium in distal view. Scale bars: 1 mm.

Figure 15. Diagrammatic representation of prostomial (A-C) and parapodial appendages from mid-body chaetigers (D, E) of CCZ-collected Euphrosinidae species (relative lengths preserved, but not drawn to scale) A Euphrosinella georgievae sp. nov. B Euphrosinopsis ahearni sp. nov. C Euphrosinopsis halli sp. nov. D Euphrosinella georgievae sp. nov. E Euphrosinopsis ahearni sp. nov. F Euphrosinopsis halli sp. nov. Abbreviations: P - palps, La - lateral antennae, Ma - median antenna, Car - caruncle, E - eyes, DC - dorsal cirrus, LC - lateral cirrus, VC - ventral cirrus, Br - branchiae.

Figure 16. Euphrosinella georgievae sp. nov. (specimen NHMUK ANEA. 2022.658) A mid body parapodium B notochaeta from anterior tier C notochaeta from mid-tier D notochaeta from posterior tier, detail of serration (insert) E-G examples of neurochaetae. Scale bars: 100 µm (A, B, E); 200 µm (C); 250 µm (D); 50 µm (F, G).

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References(1)

Neal, Lenka; Wiklund, Helena; Gunton, Laetitia M.; Rabone, Muriel; Bribiesca-Contreras, Guadalupe; Dahlgren, Thomas G.; Glover, Adrian G. (2022). Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida). <em>ZooKeys.</em> 1137: 33-74.

original descriptionWorld Register of Marine Species