A new species of Phyllochaetopterus (Chaetopteridae: Annelida) from near hydrothermal vents in the Lau Basin, western Pacific Ocean

Zootaxa ◽  
2007 ◽  
Vol 1621 (1) ◽  
pp. 55-64 ◽  
Author(s):  
EIJIROH NISHI ◽  
GREG W. ROUSE
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Hydrothermal Vents ◽  
Western Pacific ◽  
Anterior Region ◽  
Western Pacific Ocean ◽  
Middle Region ◽  
Lau Basin ◽  
The Pacific ◽  
A New Species

Phyllochaetopterus lauensis n. sp., a new species of Chaetopteridae, is described from material collected by the DSV Jason II from the vicinity of hydrothermal vents in the Lau Basin, western Pacific Ocean. The new species is characterized by the coloration and patterning of the ventral shield of the anterior region (region A), the presence of one large cutting chaeta on each parapodium of the fourth chaetiger (A4), the shape of these A4 cutting chaetae (with a pear-shaped head), and presence of two middle-region (region B) chaetigers with foliose notopodia. The new species is very similar to some Spiochaetopterus species, but belongs in Phyllochaetopterus based on its possession of a pair of anterior ‘antennae’, which are in fact cirri of chaetiger one with internal chaetae. The new species is compared to other Phyllochaetopterus species, particularly from the Pacific, and we provide a table for all species currently referred to the genus.

Hypselodoris jacksoni, a new species from the south-western Pacific Ocean (Nudibranchia: Chromodorididae), with a discussion on intraspecific variation  in mantle glands in Chromodoris willani Rudman, 1982

Zootaxa ◽  
2007 ◽  
Vol 1549 (1) ◽  
pp. 29-42 ◽  
Author(s):  
NERIDA G. WILSON ◽  
RICHARD C. WILLAN
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Intraspecific Variation ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
Lord Howe Island ◽  
Eastern Australia ◽  
Norfolk Island ◽  
Receptaculum Seminis ◽  
A New Species

A new species of Hypselodoris (Chromodorididae) is described from the subtropical and temperate south-western Pacific Ocean (eastern Australia, Lord Howe Island, Norfolk Island). The colouration of Hypselodoris jacksoni sp. nov. is distinctive, though highly variable intraspecifically. Hypselodoris jacksoni belongs to the Indo-Pacific Hypselodoris clade (for which the key synapomorphy is a minute receptaculum seminis) and, based on comparisons of internal and external morphology, appears to belong to a subclade characterised by an elevated branchial sheath, probably most closely related to H. krakotoa Gosliner & Johnson, 1999, H. reidi Gosliner & Johnson, 1999 and H. regina Ev. & Er. Marcus, 1970. Intraspecific variation in the arrangement of mantle glands in H. jacksoni prompted a preand post-fixation comparison of mantle glands in another chromodorid, Chromodoris willani Rudman, 1982. These results indicate these structures can vary significantly within a population (and thus species), and it is likely that too much emphasis has been placed on mantle glands for separating species in the recent literature.

scholarly journals Correction to: A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Hiroaki Nakano ◽  
Hideyuki Miyazawa ◽  
Akiteru Maeno ◽  
Toshihiko Shiroishi ◽  
Keiichi Kakui ◽  
...  
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
The Western Pacific ◽  
A New Species
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