Phylogeny of Hesionidae (Aciculata, Annelida), with four new species from deep-sea eastern Pacific methane seeps, and resolution of the affinity of Hesiolyra

2018 ◽  
Vol 32 (5) ◽  
pp. 1050 ◽  
Author(s):  
Greg W. Rouse ◽  
Jose Ignacio Carvajal ◽  
Fredrik Pleijel
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Dna Sequences ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Pacific Coast ◽  
Cold Seeps ◽  
Methane Seeps ◽  
The Pacific ◽  
The Usa

Hesionidae Grube, 1850 currently comprises over 175 species in 28 genera, placed in several subfamilies. Discoveries in recent years have largely been of deep-sea taxa. Here we describe a further four new hesionid species, mainly from methane ‘cold’ seeps at around 1000–1800 m depths off the Pacific coast of Costa Rica and new record of another species. Several of these taxa also occur at methane seeps in the Guaymas Basis (Mexico) and off the USA west coast (California and Oregon). The phylogenetic relationships within Hesionidae are reassessed via maximum parsimony and maximum likelihood analyses of DNA sequences from nuclear (18S rRNA and 28SrRNA) and mitochondrial (16SrRNA and Cytochrome c oxidase I) loci for the new samples. On the basis of these results, we refer one of the new species to Gyptis Marion & Bobretzky in Marion, 1874, one to Neogyptis Pleijel, Rouse, Sundkvist & Nygren, 2012, and two to Sirsoe Pleijel, 1998. The new species Gyptis robertscrippsi n. sp., Neogyptis jeffruoccoi n. sp., Sirsoe dalailamai n. sp. and Sirsoe munki n. sp. We refer to a collection of individuals from seeps ranging from Oregon to Costa Rica as Amphiduropsis cf. axialensis (Blake & Hilbig, 1990), even though this species was described from hydrothermal vents off Oregon. Neogyptis jeffruoccoi n. sp. was generally found living inside the solemyid clam Acharax johnsoni (Dall, 1891). The position of Hesiolyra bergi Blake, 1985 is resolved on the basis of newly-collected specimens from near the type locality and, as a result, Hesiolyrinae Pleijel, 1998 is synonymized with Gyptini Pleijel, 1998 (and Gyptinae Pleijel, 1998). http://zoobank.org/urn:lsid:zoobank.org:pub:9C0E88EE-34F8-4F25-9EC8-91797618AC86

Phylogeny, biogeography and systematics of Pacific vent, methane seep, and whale-fall Parougia (Dorvilleidae : Annelida), with eight new species

2020 ◽  
Vol 34 (2) ◽  
pp. 200
Author(s):  
Nicole K. Yen ◽  
Greg W. Rouse
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Phylogenetic Analyses ◽  
Methane Seep ◽  
Histone 3 ◽  
The Pacific ◽  
Different Types ◽  
The Pacific Ocean

Dorvilleidae is a diverse group of annelids found in many marine environments and also commonly associated with chemosynthetic habitats. One dorvilleid genus, Parougia, currently has 11 described species, of which two are found at vents or seeps: Parougia wolfi and Parougia oregonensis. Eight new Parougia species are recognised and described in this study from collections in the Pacific Ocean, all from whale-falls, hydrothermal vents, or methane seeps at ~600-m depth or greater. The specimens were studied using morphology and phylogenetic analyses of DNA sequences from mitochondrial (cytochrome c oxidase subunit I, 16S rRNA, and cytochrome b) and nuclear (18S rRNA and histone 3) genes. Six sympatric Parougia spp. were found at Hydrate Ridge, Oregon, while three of the Parougia species occurred at different types of chemosynthetic habitats. Two new species were found over wide geographical and bathymetric ranges. Another dorvilleid genus, Ophryotrocha, has previously been highlighted as diversifying in the deep-sea environment. Our results document the hitherto unknown diversity of another dorvilleid genus, Parougia, at various chemosynthetic environments. http://zoobank.org/urn:lsid:zoobank.org:pub:EC7EBBEA-2FB5-43D6-BE53-1A468B541A5C

scholarly journals A new species of Leptogorgia (Cnidaria: Anthozoa: Octocorallia) from Golfo Dulce, Pacific, Costa Rica

Zootaxa ◽  
2012 ◽  
Vol 3182 (1) ◽  
pp. 65 ◽  
Author(s):  
ODALISCA BREEDY ◽  
HECTOR M. GUZMAN
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Pacific Coast ◽  
Single Species ◽  
San Jose ◽  
Ongoing Research ◽  
Deep Waters ◽  
The Pacific ◽  
The Pacific Ocean ◽  
A New Species

The description of this single species is necessary to facilitate the publication of ongoing research conducted by Rita Vargas at the Museum of Zoology, University of Costa Rica, dealing with the associated microfauna. Presently 24 species of Leptogorgia have been reported for the eastern Pacific, 13 of which have been found in Costa Rica (Breedy & Cortés 2011). Although octocoral surveys have been conducted as part of biodiversity studies, there is no published information regarding the occurrence of this taxon in Golfo Dulce. Here we describe a new species of Leptogorgia and compare it with other Leptogorgia species with similar characteristics. Golfo Dulce is a bay located on the southern Pacific coast of Costa Rica. It is about 50 km long, 10–15 km wide, and covers an area of approximately 680 km². The inner part of Golfo Dulce has a maximum depth of slightly over 200 m with a 60 m deep sill at the opening to the Pacific Ocean (Cortés 1999). It has been considered a tropical fjord because of the bathymetry and the presence of anoxic deep waters (Cortés 1999, Svendsen et al. 2006). Specimens were collected by Scuba diving, preserved in 70% ethanol or air dried, and treated and identified following the current methodology (Breedy & Guzman 2002). The holotype and paratypes are deposited in the Museo de Zoología, Universidad de Costa Rica (MZUCR, formerly UCR), San José, P.O. Box 11501-2060, Costa Rica.

scholarly journals A new species and phylogenetic insights in Hesiospina (Annelida, Hesionidae) 

Zootaxa ◽  
2018 ◽  
Vol 4441 (1) ◽  
pp. 59 ◽  
Author(s):  
PAULO BONIFÁCIO ◽  
YANN LELIÈVRE ◽  
EMMANUELLE OMNES
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Cold Seeps ◽  
Molecular Analyses ◽  
The Third ◽  
Juan De Fuca ◽  
Ne Pacific ◽  
A New Species

Hesionids are a very speciose group of polychaetes. In the deep sea, they occur in different environments such as hydrothermal vents, cold seeps, abyssal depths or whale falls. In the present study, a new species of Hesionidae, Hesiospina legendrei sp. nov. has been identified based on morphological and molecular (16S and COI genes) data from hydrothermal vents located in Juan de Fuca Ridge (NE Pacific Ocean). This new species is characterized by trapezoid prostomium; proboscis with high number of distal papillae (20–27), a pair of sac-like structures inserted ventro-laterally in proboscis; notopodia lobe reduced with multiple, slender aciculae on segments 1–5; and neuropodia developed with single, simple chaeta, and numerous, heterogomph falcigers, with 1–2 inferiormost having elongated hood. Hesiospina legendrei sp. nov. is the third described species in the genus. Sequences from the two previously described Hesiospina species are included in the molecular analyses, and although the genes used in this study are not sufficient to resolve the relationships on genus level, the result raises questions about the cosmopolitan aspect of H. vestimentifera. 

scholarly journals A new species of Placiphorella (Polyplacophora: Mopaliidae) from the North American Pacific coast

The Festivus ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 103-107
Author(s):  
Roger Clark
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Deep Sea ◽  
Pacific Coast ◽  
The North ◽  
The Pacific ◽  
A New Species

A new deep-sea chiton of the genus Placiphorella Dall, 1879, Placiporella laurae n. sp. is described from the Pacific coast of North America. It is compared with its congener Placiphorella pacifica Berry, 1919, from which it differs primarily by having granular valves, lacking false beaks, a papillose girdle, and the characteristics of its girdle spicules

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