Bryozoa of Floridan Oculina reefs
Author
Judith L Winston
text
Zootaxa
2016
4071
1
1
81
journal article
51549
10.11646/zootaxa.4071.1.1
8ffe5a88-06f7-44af-95aa-5fd49e0302c4
1175-5326
260490
D47C792F-E91D-40A6-ABB7-FA7810578562
Klugerella aragoi
(Audouin, 1826)
(
Fig. 20
;
Table 19
)
Flustra aragoi
Audouin, 1826: 240
, pl. 10, fig. 1.
Membraniporella aragoi
: Cook 1967: 332
, fig. 7; Winston 1982: 134, fig. 57.
TABLE 19.
Measurements in mm of
Klugerella aragoi
Audouin, 1826
.
Lz
|
Wz
|
Lop
|
Wop
|
Lo
|
Wo
|
Lov
|
Wov
|
N |
18 |
18 |
18 |
18 |
6 |
6 |
18 |
18 |
Mean |
0.511 |
0.369 |
0.363 |
0.258 |
0.081 |
0.143 |
0.173 |
0.265 |
SD |
0.036 |
0.028 |
0.033 |
0.027 |
0.010 |
0.020 |
0.021 |
0.025 |
Min |
0.432 |
0.324 |
0.306 |
0.216 |
0.072 |
0.126 |
0.126 |
0.216 |
Max |
0.576 |
0.432 |
0.45 |
0.324 |
0.09 |
0.18 |
0.198 |
0.306 |
Material examined.
VMNH no. 70630; USNM no. 1283246.
Description
. Colony encrusting, unilamellar (
Fig. 20
A). Zooids oval with smooth convex gymnocyst and vestigial band of granular cryptocyst surrounding large oval opesia. Articulated periopesial spines 10–12, flattened and curving over frontal membrane from edge of the gymnocyst laterally and proximally, meeting at zooidal center (
Fig. 20
B,C), sometimes bifurcating at tips; distalmost spines on oral rim 2–3, the middle spine lacking when ooecia present (
Fig. 20
C), the 2 lateral spines either side of operculum on each side, bifurcating nearer their bases than do remaining periopesial spines; in most colonies free ends of spines broken off early in life, but proximal portions may remain in place even after colony dies (
Fig. 20
F). No avicularia. Ooecia prominent, subglobular, with smooth surface around a central ectooecial window (
Fig. 20
B). Zooids connected by pore chambers that are membrane-covered in life (
Fig. 20
D).
Remarks.
Specimens in
Oculina
rubble were all abraded and had lost all but the lower ends of the spines, but clearly belong to the common Floridan
Klugerella
illustrated by a more complete specimen in Winston (1982) (as
Membraniporella aragoi
). Osburn (1950) and Cook (1967) considered Floridan and Caribbean specimens to be varieties of
Klugerella aragoi
from the Red Sea and that decision was followed by Winston (1982). The species has close affinities with
Membraniporella petasus
(Canu & Bassler, 1928a, p. 36, pl. 4, figs 1, 2), but the illlustrations of their specimens show a greater number of bifid costae that also appear to be more flattened and fused centrally.
Distribution.
Western Atlantic: Cape Hatteras to Florida.