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
Hippoporina caribaea
Winston, 2005
(
Fig. 30
;
Table 29
)
Escharella pertusa
: Smitt 1873: 55
.
Hippodiplosia pertusa
: Canu & Bassler 1928a: 106
, pl. 9, fig. 6; pl. 32, fig. 10; Osburn 1940: 430; Cheetham & Sandberg 1964: 1041, text-fig. 54; Shier 1964: 632.
Hippoporina americana
: Long & Rucker 1970: 2
, fig. 4:1.
Hippoporina caribaea
Winston, 2005: 65
, figs 174–178.
TABLE 29.
Measurements in mm of
Hippoporina caribaea
Winston, 2005
.
|
Lz
|
Wz
|
Lo
|
Wo
|
Lov
|
Wov
|
| N |
18 |
18 |
18 |
18 |
7 |
7 |
| Mean |
0.571 |
0.394 |
0.126 |
0.125 |
0.213 |
0.293 |
| SD |
0.061 |
0.052 |
0.010 |
0.008 |
0.019 |
0.059 |
| Min |
0.450 |
0.324 |
0.108 |
0.108 |
0.180 |
0.234 |
| Max |
0.684 |
0.486 |
0.144 |
0.144 |
0.234 |
0.378 |
Material examined.
MCZ #87, Smitt’s non-ovicellate
holotype
of
Escharella pertusa
[with
Porina plagiopora
],
18 January 1869
, cast no. 3, W. of
Tortugas
, 60 fms, coll. L. Pourtales; USNM,
Hippodiplosia pertusa
, plesiotype 7521, Albatross Stn D 2362, east of Yucatan; VMNH no. 70643; USNM no. 1283254.
Description.
Colony encrusting dead
Oculina
or mollusc shells (
Fig. 30
A). Zooids subrectangular to irregularly polygonal, with relatively flat, thickly calcified frontal shield with many (70+) round pores and some larger irregular marginal pores; these becoming covered by secondary calcification (
Fig. 30
B, C). Orifice broadly hoof-shaped, with semicircular anter and shallow poster with rounded, downward facing condyles (
Fig. 30
E). Peristome low, rough-textured, with smooth inner and irregular outer margins. Raised calcification at zooid rims marks junctions of lateral walls of adjacent zooids as raised threadlike suture lines which may also be visible on ooecia. Ooecia large relative to zooid size, convex with round pseudopores similar to those of frontal shields, sometimes with suture lines (
Fig. 30
C, D).
FIGURE 30.
Hippoporina caribaea
Winston, 2005
:
A,
edge of a colony encrusting a mollusc shell;
B,
autozooids, showing threadlike calcification of zooid margins;
C,
zooid with an ooecium;
D,
close-up of orifice, showing condyles;
E,
close up of ooecium and orifice of fertile zooid. Scale bars: A, 1 mm; B, C, 0.3 mm; D, 0.1 mm; E, 0.2 mm.
Remarks.
Although Smitt (1873) described his unillustrated specimen as having avicularia, none have been found on Floridan specimens. Smitt believed his specimen to be the
Hippoporina pertusa
(Esper, 1796)
, the eastern Atlantic
type
species of the genus. This name continued to be used by later authors for western Atlantic material, but
H. caribaea
differs from
H. pertusa
in having almost twice as many frontal pores, large irregular marginal pores and no cruciform suboral umbo.
Distribution.
Florida, Gulf of
Mexico
, Caribbean.