New shallow-water sponges (Porifera) from the Galápagos Islands
Author
Sim-Smith, Carina
Author
Hickman, Cleveland
0000-0002-2914-4687
hickman.c@rockbridge.net
Author
Kelly, Michelle
0000-0001-9673-0056
elly@niwa.co.nz
text
Zootaxa
2021
2021-08-02
5012
1
1
71
http://dx.doi.org/10.11646/zootaxa.5012.1.1
journal article
10.11646/zootaxa.5012.1.1
1175-5326
5158062
56C6852D-AAE0-4B6B-AB57-919CD62DAEC1
Ciocalypta bustamanti
sp. nov.
(
Fig. 27
)
Material examined.
Holotype
—
MCCDRS9438,
Punta Vicente Roca
,
Isabela Island
,
0.049° S
,
91.558° W
,
12 m
,
19 Jun 2001
.
Type
locality.
Punta Vicente Roca
,
Isabela Island
.
Habitat and distribution.
Only collected from
type
locality;
12 m
, but was also observed at
Islet Cowley
,
Isabela Island
;
Roca Don Ferdi
,
Santiago Island
; and
León Dormido
,
San Cristóbal Island
.
Description.
A thinly encrusting basal mass from which arise numerous long, slender, conical fistules, ≤
30 mm
thick and
5 mm
diameter at the base. A semi-translucent aquiferous drainage canal is visible down the length of the fistule. No visible oscules. Colour is light ochre in life, cream in ethanol. Texture is very soft. The surface is covered in encrusting filamentous algae (
Fig. 27A
).
Skeleton.
Fistules contain dense, centrally located primary tracts of styles from which emerge secondary tracts that radiate towards the surface (
Fig. 27B
). Ectosome is indistinct and appears to be tangential where it occurs. Skeleton of the basal mass is confused.
Spicules.
Megascleres—
Two size classes of styles, though, there is little size separation between the two size classes. Styles I, 346 (319–372) × 8 (5–11) µm (n = 20). Styles II, 226 (161–282) × 6 (5–9) (n = 20) (
Fig. 27C–D
).
Etymology.
Named after Rodrigo Bustamante for his invaluable assistance in many ways to co-author Cleveland Hickman with logistics, making available laboratory space while at the Charles Darwin Research Station, and for help in the collection of these sponges.
Remarks.
No other species of
Ciocalypta
have been described from the eastern Pacific;
Ciocalypta bustamanti
sp. nov.
is a first record for the region.
Class
Calcarea Bowerbank
Subclass
Calcinea Bidder