A phylogeny of Iconaster and Glyphodiscus (Echinodermata, Asteroidea, Valvatida, Goniasteridae) with descriptions of four new species
Author
Mah, Christopher
Department of Geology, University of Illinois at Urbana-Champaign, 245 NHB, 1301 W. Green, Urbana, Illinois 61801 (USA) mah @ uiuc. edu.
mah@uiuc.edu
text
Zoosystema
2005
27
1
137
161
journal article
10.5281/zenodo.5392847
1638-9387
5392847
Glyphodiscus magnificus
n. sp.
(
Fig. 3
A-C)
HOLOTYPE
. —
Palau
.
CRECH 146
,
Mutremdiu
2,
Palau
,
7°16.41’N
,
134°31.43’E
,
162 m
,
29.III.2001
, specimen wet,
R
=
7.5 cm
, r =
2.6 cm
(
CASIZ 168012
).
PARATYPES
. —
New Caledonia
.
BATHUS 1, stn CP 701,
20°57.5’S
,
165°35.9’E
,
302-335 m
,
18.III.1993
, 1 dry specimen,
R
=
4.1 cm
, r =
1.5 cm
(
MNHN
EcAs 11682). — MUSORSTOM 4, stn DW 186,
19°07’S
,
163°30’E
,
190 m
,
19.IX.1985
, 1 dry specimen,
R
=
2.5 cm
, r =
1.1 cm
(
MNHN
EcAs 11684). — MUSORSTOM 4, stn DW 185,
19°06’S
,
163°29’E
,
230 m
,
18.IX.1985
, 7 dry specimens,
R
=
2.2 cm
, r =
0.8 cm
,
R
=
2.4 cm
, r = 1.0 cm,
R
=
2.6 cm
, r = 1.0 cm,
R
=
2.7 cm
, r =
1.1 cm
,
R
=
3.4 cm
, r =
1.5 cm
,
R
=
3.6 cm
, r =
1.8 cm
,
R
=
3.8 cm
, r =
1.6 cm
(
MNHN
EcAs 11683). —
SMIB
5, 250 m
,
13.IX.1989
, rocks, 3 dry specimens,
R
=
2.4 cm
, r = 1.0 cm,
R
=
2.7 cm
, r =
1.1 cm
,
R
=
2.9 cm
, r =
1.2 cm
(
MNHN
EcAs 11692). —
SMIB
5, stn DW 90,
22°19.1’S
,
168°41.6’E
,
310-340 m
13.IX.1989
, 1 dry specimen,
R
=
2.7 cm
, r =
1.2 cm
(
MNHN
EcAs 11693).
Vanuatu
.
MUSORSTOM 8, stn CP 970,
20°19’S
,
169°53’E
,
252-310 m
,
21.IX.1994
, 1 dry specimen,
R
=
4.3 cm
, r = 2.0 cm (
MNHN
EcAs 11691).
ETYMOLOGY. — The descriptor
magnificus
describes the magnificent and striking appearance of this species.
DISTRIBUTION. —
New Caledonia
,
Vanuatu
, and
Palau
.
162-
335 m
.
DIAGNOSIS. — A species with interradial marginal (supero- and infero- series) plates bearing conical prominences extended from the plate. Furrow and subambulacral spines are flattened and nearly flush with the actinal surface.
APOMORPHY LIST
. — 14, marginal cones (
Fig. 3A
). 20, subambulacral spines present (
Fig. 3C
). 21, subambulacral spines flattened (
Fig. 3C
).
DESCRIPTION
Body relatively flattened. Arms elongate. Interradial arcs broad-linear. Pedicellariae absent on abactinal surface and marginal plate series. Pedicellariae present on actinal surface.
Abactinal surface flat. Disk region stellate.