Bryozoa of Floridan Oculina reefs
Author
Judith L Winston
text
Zootaxa
2016
4071
1
1
81
journal article
10.11646/zootaxa.4071.1.1
8ffe5a88-06f7-44af-95aa-5fd49e0302c4
1175-5326
260490
D47C792F-E91D-40A6-ABB7-FA7810578562
Aplousina gigantea
Canu & Bassler, 1927
(
Fig. 8
,
Table 7
)
Aplousina gigantea
Canu & Bassler, 1927: 3
; 1928a: 20, pl. 2, fig. 6, text-fig. 3; Osburn 1940: 357; Maturo 1957: 38; Shier 1964: 612; Winston 1982: 123, fig. 34.
FIGURE 8.
Aplousina gigantea
Canu & Bassler, 1927
:
A,
zooids at growing edge;
B,
close-up of ovicelled zooid;
C,
group of autozooids;
D,
close-up of ooecium. Scale bars: A, 1 mm; B, C, 0.5 mm; D, 0.1 mm.
TABLE 7.
Measurements in mm of
Aplousina gigantea
Canu & Bassler, 1927
.
Lz
|
Wz
|
Lop
|
Wop
|
Lo
|
Wo
|
Lov
|
Wov
|
N |
18 |
18 |
18 |
18 |
10 |
10 |
5 |
5 |
Mean |
0.811 |
0.571 |
0.726 |
0.489 |
0.139 |
0.194 |
0.119 |
0.310 |
SD |
0.076 |
0.077 |
0.079 |
0.050 |
0.026 |
0.017 |
0.030 |
0.035 |
Min |
0.720 |
0.450 |
0.612 |
0.396 |
0.090 |
0.180 |
0.090 |
0.270 |
Max |
1.008 |
0.720 |
0.936 |
0.576 |
0.162 |
0.234 |
0.162 |
0.360 |
Material examined.
VMNH no. 70606; USNM no. 1283233.
Description.
Colonies encrusting on shell or
Oculina
rubble (
Fig. 8
A–C). Zooids very large, measuring about 0.80 x 1.00 mm, ovoid to hexagonal in shape, almost all of the frontal surface membranous, edged by a narrow low-beaded cryptocystal rim and occasional narrow proximal gymnocyst. Ooecium endozooidal, comprising shallow imperforate cucullate structure (
Fig. 8
B, D) formed by extension of the distal zooid wall under proximal gymnocyst and cryptocyst of daughter zooid.
Remarks.
The large size of zooids makes it possible to distinguish this species from others encrusting shell substrata, even without magnification.
Distribution
. Beaufort, North Carolina to Florida. Eastern Gulf of
Mexico
.