Terebellidae (Annelida, Terebelliformia) from Lizard Island, Great Barrier Reef, Australia
Author
Nogueira, João Miguel Matos
Author
Hutchings, Pat
Author
Carrerette, Orlemir
text
Zootaxa
2015
4019
1
484
576
journal article
10.11646/zootaxa.4019.1.18
17696c34-012b-4e06-bd03-8516d44a6814
1175-5326
289527
906BB67C-F137-4CDA-A26B-77A025725800
Genus
Eupolymnia
Verrill, 1900
Eupolymnia
.—
Hutchings & Glasby 1988
: 12
–13;
Capa & Hutchings 2006
: 4
.
Type-species.
Amphitrite nesidensis
Delle
Chiaje, 1828
, designated by
Hartman (1959)
.
Diagnosis.
Transverse prostomium attached to dorsal surface of upper lip; basal part usually with eyespots; distal part shelf-like. Peristomium forming lips; hood-like upper lip; small, swollen lower lip, restricted to oral area. Lobes present on segments 1–4, ventral, marginal to mouth on segment 1, ventro-lateral on segment 2, and progressively shorter and inserted more laterally on segments 3 and 4. Paired dorso-lateral arborescent branchiae present on segments 2–4, 3 pairs. Anterior segments with glandular, rectangular, smooth to corrugated mid-ventral shields; mid-ventral groove extending posteriorly from termination of mid-ventral shields. Short and conical notopodia beginning from segment 4, extending for 17 segments, until segment 20. Notopodia throughout with narrowly-winged distally notochaetae in both rows. Neuropodia present from segment 5, as low ridges until termination of notopodia, as short pinnules thereafter. Neurochaetae throughout as short-handled avicular uncini, arranged in completely intercalated double rows from segment 11 until termination of notopodia, on segment 20; uncini throughout with dorsal button at mid-length of base, distally pointed prow and crest with few rows of secondary teeth. Nephridial and genital papillae usually present between parapodial lobes of variable number of anterior segments. Pygidium smooth to slightly crenulate.
Remarks.
Eupolymnia
is a readily recognizable genus due to the shape of the lobes on anterior segments, ventral, around the mouth on segment 1, ventro-lateral on segment 2 and progressively shorter and more laterally inserted on segments 3 and 4.
Another character which is diagnostic for this genus is the distribution of prostomial eyespots. After observation of live specimens of species from
Brazil
and
Australia
, we noticed that species of
Eupolymnia
, at least those occurring in
Australia
and
Brazil
, typically have a continuous row of eyespots across the prostomium, without mid-dorsal gap, but with a single eyespot wide line instead mid-dorsally, with eyespots widely separated from each other (
Figs 2
E–G; 36C, F–G).
Two species of
Eupolymnia
were previously known from Australian waters,
E. koorangia
Hutchings & Glasby, 1988
and
E. trigonostoma
(
Schmarda, 1861
)
.
Eupolymnia koorangia
was described from material from Kangaroo
Island
, SA, but has been found all around
Australia
, including Lizard
Island
(
Hutchings & Glasby 1988
), although in this paper we transfer these records to the new species described herein.
Capa & Hutchings (2006)
provide a table of the diagnostic characters of the 20 species of the genus currently recognised.
Eupolymnia trigonostoma
was described from material from off NSW (no depth given but trawled), and
Hessle (1917)
synonymised the species with
Polymnia congruens
(
Marenzeller, 1884
) (
Hessle 1917: 176
)
, a species originally described from off
Japan
. However,
Hutchings & Glasby (1988)
could not locate the
type
material of
E. trigonostoma
or any modern description,
Capa & Hutchings (2006)
listed both species (
E. trignostoma
and
E. congruens
) in their table, but most characters are not scored for
E. trigonostoma
, because there is no information on these characters in the original description. So we suggest that
E. trigonostoma
is dubious, unless material from the
type
locality is available for study, and that this species should not have been synonymised with
E. congruens
.