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
Parasmittina oculinae
sp. nov.
(
Fig. 27
;
Table 26
)
TABLE 26.
Measurements in mm of
Parasmittina oculinae
sp. nov.
|
Lz
|
Wz
|
Lo
|
Wo
|
Lov
|
Wov
|
Lav
|
Wav
|
| N |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
| Mean |
0.435 |
0.354 |
0.075 |
0.098 |
0.162 |
0.201 |
0.102 |
0.045 |
| SD |
0.050 |
0.088 |
0.009 |
0.009 |
0.011 |
0.007 |
0.011 |
0.008 |
| Min |
0.360 |
0.270 |
0.063 |
0.090 |
0.144 |
0.198 |
0.090 |
0.036 |
| Max |
0.486 |
0.522 |
0.090 |
0.108 |
0.180 |
0.216 |
0.117 |
0.054 |
Material examined.
Holotype
: VMNH no. 70640.
Etymology.
Based on the Latinized singular possessive of
Oculina
, i.e. the
Oculina
Parasmittina
, alluding to the habitat in which it was found.
Diagnosis.
Parasmittina
with 2 orificial spines, a narrow lyrula, an ooecium with 2 narrow bands of pores, and 2 kinds of avicularia—small oval avicularia oriented distoproximally and small acute triangular avicularia oriented toward the orifice.
Description.
Colony encrusting dead
Oculina
(
Fig. 27
A). Zooids subrectangular, lateral margins straight, frontal shield slightly convex, imperforate except for large evenly spaced marginal pores, calcification thick and pustulose (
Fig. 27
B, C). Primary orifice round distally, smooth rimmed, with a small, weakly anvil-shaped, lyrula and narrow elongate condyles; 2 oral spines. A low uneven-edged peristome forms oval secondary orifice. 1–2 small avicularia, oval to slightly subtriangular, with median crossbars and raised rims, set into frontal shield and oriented distally or slightly tilted toward orificial center; if 2 avicularia, these paired at about same level on either side and below orifice (
Fig. 27
B–D). Ooecium spherical, outer layer coarsely calcified, stemming from distal zooid on which ooecium develops, inner layer with numerous small pores (
Fig. 27
D, E).
Remarks
. The paired oral spines and the general shape of the orifice are similar to that in
Parasmittina betamorphaea
, another species found on the SE
U.S.
coast, but
P. betamorphaea
has a wider lyrula, its small oval avicularia are slightly spatulate and oriented distoproximally, its small triangular avicularia are acute and oriented toward the orifice and the pores of the inner oecial layer in
P. b e t a m o r p ha e a
are larger and sparser, occurring in two separate bands.
Distribution.
Florida Atlantic shelf
Oculina
reefs.