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FIG. 5. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 5. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768), left thoracic appendages; A, third maxilliped, lateral view; B, tip of ultimate segment of third maxilliped, mesial view; C, distal two segments of third maxilliped, mesial view; D, first pereopod, lateral view; E, fingers of first pereopod, lateral view; F, second pereopod, lateral view; G, fingers of second pereopod, lateral view; H-J, third to fifth pereopods, lateral view. Scale bars: A, D, F, H-J, 5 mm; B, 0.5 mm; C, 2 mm; E, G, 1 mm.

FIG. 8. — Nematocarcinus ovalis n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 8. — Nematocarcinus ovalis n. sp., holotype ovigerous, HOPE 99, stn 54803#3, NEPR, cl 27.5 mm (MNHN-Na 15765); A, rostrum, carapace and cephalic appendages, lateral view (distal part of rostrum, left eye and distal part of left antennal scale broken off; carapace somewhat deformed, thus dorsal notch more accentuated than real); B, anterior part of carapace, rostrum and cephalic appendages, lateral view; C, third abdominal somite to telson and left uropod, lateral view; D, posterior part of fifth abdominal somite and sixth somite, ventral view; E, telson, dorsal view. Scale bars: A-C, 5 mm; D, E, 2 mm.

FIG. 1 in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 1. — Map of the East Pacific and Antarctic Pacific Rises, showing sampling locations of specimens of Nematocarcinus burukovskyi n. sp., N. ovalis n. sp., and an indeterminate species.

FIG. 11 in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 11. — Nematocarcinus faxoni Burukovsky, 2001, paratype, off Marias Island, Mexico, cl 25.6 mm (USNM 21139); A, rostrum, anterior part of carapace and cephalic appendages, lateral view; B, posterior part of fifth abdominal somite and sixth somite, ventral view (setae omitted); C, posteroventral spots and posterior setal pits on sixth abdominal somite, ventral view; D, posterior part of right fifth abdominal pleuron, ventral view. Scale bars: A, 5 mm; B, 2 mm; C, D, 1 mm.

FIG. 10. — Nematocarcinus ovalis n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 10. — Nematocarcinus ovalis n. sp., holotype ovigerous, HOPE 99, stn 54803#3, NEPR, cl 27.5 mm (MNHN-Na 15765); A, right third maxilliped, lateral view; B, right first pereopod, lateral view; C, merus and ischium of left second pereopod, lateral view; D, chela and carpus of left second pereopod, lateral view; E, merus and ischium of right third pereopod, lateral view; F, dactylus, propodus and carpus of right third pereopod, lateral view. Scale bar: 5 mm.

FIG. 4. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 4. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768), appendages dissected from left; A, mandible, dorsal view; B, same, ventral view; C, same, distal part of molar process, dorsal view; D, maxillule, ventral view (coxal endite partly broken); E, maxilla, ventral view; F, first maxilliped, ventral view (coxal endite broken); G, second maxilliped, ventral view; H, antenna, ventral view; I, prominences on sixth to eighth thoracic sternites, ventral view; J, appendix masculina and appendix interna of second pleopod, mesial view; K, posterolateral part of exopod of uropod, dorsolateral view. Scale bars: A-D, J, 0.5 mm; E-I, 2 mm; K, 1 mm.

FIG. 3. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 3. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768); A, rostrum and carapace, lateral view (setae omitted); B, rostrum, anterior part of carapace and cephalic appendages, lateral view; C, posterior part of third abdominal somite to telson and left uropod, lateral view; D, sixth abdominal somite and posterior part of pleuron of fifth somite, slightly obliquely ventral view (setae omitted); E, telson, dorsal view; F, posterior part of telson, dorsal view. Scale bars: A, C, 5 mm; B, D, E, 2 mm; F, 1 mm.

FIG. 6. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise

FIG. 6. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768); A, third abdominal somite, dorsal view; B, left fifth pleuron, lateral view (setae omitted); C, right fifth pleuron, lateral view; D, epipod on third maxilliped, lateral view; E, chela of first pereopod, lateral view; F, I, J, dactyli and propodi of third to fifth pereopod, lateral view; G, dactylus and distal part of propodus of third pereopod, lateral view (dorsodistal distal setae propodus omitted); H, dactylus of third pereopod, dorsal view; K, dactylus and distal part of propodus, proximolateral view; L, dactylus of fifth pereopod, dorsal (extensor) view. Scales: A, B, C, 2 mm; E, F, I, J, 1 mm; G, D, H, K, L, 0.5 mm.

Fig. 5 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 5. Ophryotrocha kailae sp. nov. A. Whole body of living holotype (SIO-BIC A14100); inset shows the posterior end of paratype (SIO-BIC A14099) with pygidial cirri. B. Mandibles of paratype (SIO-BIC A14099). C. Maxillae of paratype (SIO-BIC A14099). D. Parapodium of paratype (SIO-BIC A14102). E. Simple supra-acicular chaetae of paratype (SIO-BIC A14102). F. Compound sub-acicular chaetae of paratype (SIO-BIC A14102). G. Simple sub-acicular chaeta of paratype (SIO-BIC A14102).

Fig. 4 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 4. Ophryotrocha charlottae sp. nov. A. Whole body of living holotype (SIO-BIC A14096). B. Maxillae of holotype (SIO-BIC A14096). C. Mandibles from holotype (SIO-BIC A14096). D. Parapodium of paratype (SIO-BIC A14098). E. Simple supra-acicular chaetae of paratype (SIO-BIC A14098). F. Compound sub-acicular chaetae of paratype (SIO-BIC A14098). G. Simple sub-acicular chaeta of paratype (SIO-BIC A14098).

Fig. 2 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 2. Haplotype networks from COI data with geographic locality (°NS) coding. A. Ophryotrocha cf. akessoni Blake, 1985. B. O. charlottae sp. nov. C. O. kailae sp. nov. D. O. marinae sp. nov.

Fig. 3 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 3. Ophryotrocha cf. akessoni Blake, 1985. A. Dorsal and ventral views of live specimen (SIO-BIC A14105). B. Mandibles (SIO-BIC A14107). C. Maxillae (SIO-BIC A14107). D. Parapodium (SIO-BIC A14105). E. Simple supra-acicular chaetae (SIO-BIC A14105). F. Compound sub-acicular chaetae (SIO-BIC A14105). G. Simple sub-acicular chaeta (SIO-BIC A14106).

Fig. 9 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 9. Ophryotrocha bohnorum sp. nov. A. Whole body of living paratype (SIO-BIC A14095). B. Dorsal view of anterior living holotype (SIO-BIC A14092) one of the distinctive brown spots on the peristomium indicated by white arrow. C. Mandibles of paratype (SIO-BIC A14093). D. Maxillae of paratype (SIO-BIC A14093). E. Parapodium of paratype (SIO-BIC A14093). F. Simple supra-acicular chaetae of paratype (SIO-BIC A14093). G. Compound sub-acicular chaetae of paratype (SIO-BIC A14093).

Fig. 7 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 7. Ophryotrocha marinae sp. nov. A. Dorsal and ventral views of living paratype (SIO-BIC A14031). B. Whole specimens from paratype (SIO-BIC A14112). C. Mandibles of specimen from paratype (SIO- BIC A6308). D. Maxillae of specimen from paratype (SIO-BIC A6308). E. Parapodium of holotype (SIO-BIC A14109). F. Simple supra-acicular chaetae of holotype (SIO-BIC A14109). G. Compound sub-acicular chaetae of holotype (SIO-BIC A14109). H. Simple sub-acicular chaeta of paratype (SIO- BIC A14109).

Fig. 6 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 6. Ophryotrocha marinae sp. nov. A. Numerous specimens associated with the tubes of Oasisia alvinae Jones, 1985 (Vestimentifera) at active hydrothermal vents of the Pescadero Basin (Mexico). Image from ROV SuBastian dive S0495, courtesy of the Schmidt Ocean Institute. B. Numerous specimens associated with microbial mat on the seafloor at active hydrothermal vents adjacent to a large mass of Oasisia alvinae. Some of these were collected and formed lots (SIO-BIC A6308, A1408– 14112). Image from ROV Doc Ricketts dive 750 in the Pescadero Basin, courtesy of the Monterey Bay and Aquarium Research Institute.

Fig. 8 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 8. Ophryotrocha pruittae sp. nov. A. Dorsal view of living holotype (ICML-EMU-13288). B. Maxillae from paratype (SIO-BIC A14123). C. Mandibles from paratype (SIO-BIC A14123). D. Parapodium from paratype (SIO-BIC A6322). E. Simple supra-acicular chaetae from paratype (SIO- BIC A6322). F. Compound sub-acicular chaetae from paratype (SIO-BIC A6322). G. Simple subacicular chaetae of paratype (SIO-BIC A6322).

Fig. 1 in Ophryotrocha (Dorvilleidae, Polychaeta, Annelida) from deep-sea hydrothermal vents, with the description of five new species

Fig. 1. Phylogenetic tree of Dorvilleidae Ophryotrocha Chamberlin, 1919 based on the Maximum Likelihood and Bayesian Inference analysis of the concatenated dataset of three genes. The outgroup, Eunice pennata (Müller, 1776) is not shown. Numbers on the nodes represent bootstrap support (BS) values followed by posterior probability (PP) values. Blank values indicate BS score of less than 50 or PP of less than 0.7. The * symbol indicated BS support was 95% or greater and PP was 1. Orange branches indicate hydrothermal vent lineages showing that vents have been colonized at least 5 × by Dorvilleidae, 3 × within Ophryotrocha Claparède & Mecznikow, 1869. The letters A and B refer to the two main clades of Ophryotrocha.