New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
Author
Mcknight, Donald G.
text
Zootaxa
2003
352
1
36
journal article
51250
10.5281/zenodo.156750
db5a5512-bcdb-4bc0-8221-049102f18639
11755326
156750
Dictenophiura
H.L. Clark, 1923
As originally described,
Dictenophiura
was characterized by the longitudinally divided first lateral armplates, the presence of an inner and outer arm comb, a flat elevated disc, short stout flattened arms and small upper and under armplates. Three species were assigned to the genus:
D. carnea
(Forbes)
, the
type
species,
D. anoidea
H.L. Clark
from the Atlantic Ocean, and
D. stellata
(Studer)
from the Pacific. A third Atlantic species,
D. skoogi
(Koehler)
, is now recognized as a subspecies of
D. carnea
.
Two further species have been described from the Pacific Ocean:
D. ctenophora
(H.L. Clark 1909)
and
D. squamosa
Baker
(1979)
.
Mortensen (1933)
and Madsen (1970) noted that the divided first dorsal armplate is not a constant feature in
D. carnea
or
D. stellata
;
Mortensen (1933)
suggested that
D. stellata
(Studer)
may represent a separate genus.
Both Madsen (1970) and
Paterson (1985)
in commenting on the Atlantic species regarded
Dictenophiura
as a subgenus only; both
Baker
(1979)
and Rowe (1995), in reference to Pacific species, preferred full generic status, which I have followed.
Sufficient material is lacking to determine the generic status of Pacific species referred to
Dictenophiura
.
Of the Pacific species,
D. stellata
sometimes has the first dorsal armplate longitudinally divided, while in
D. ctenophora
and
D. squamosa
the division is transverse. One further species from the Pacific Ocean is now added, but I note that none of these four may be congeneric with
D. carnea
.