Micropora acuminata Winston, 2005

Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81: 24

publication ID

http://doi.org/10.11646/zootaxa.4071.1.1

publication LSID

lsid:zoobank.org:pub:D47C792F-E91D-40A6-ABB7-FA7810578562

persistent identifier

http://treatment.plazi.org/id/19362D2E-2002-FFA7-BBA5-FDB6FC06F91D

treatment provided by

Plazi

scientific name

Micropora acuminata Winston, 2005
status

 

Micropora acuminata Winston, 2005 

( Fig. 12 View Figure ; Table 11)

Micropora coriacea: Smitt 1873: 13  , pl. 3, fig. 74; Canu & Bassler 1928 a: 62, text-fig. 8 e; Osburn 1940: 373; 1947: 17; Marcus 1949: 16, fig. 19; 1955: 285; Winston 1982: 125, fig. 39.

Micropora acuminata Winston, 2005: 25  , figs 69–72.

Material examined. VMNH no. 70613, 70614; USNM no. 1283237.

Description. Colony ( Fig. 12 View Figure A) encrusting dead shell, coral rubble, etc. Zooids oval distally, angular proximally, variable in size, a distinct shallow groove marking adjoining lateral walls ( Fig. 12 View Figure B, C). Frontal membrane underlain by cryptocyst with about 26–36 small pores and a granular surface texture. Orifice small, transversely narrowly D-shaped, with smooth calcification around entire rim, although on its proximal edge the adjoining cryptocystal granularities may confer a minutely serrated appearance from certain angles. Raised smooth tubercles of calcification curve around each side of the orifice, with a slit-like opesiule on each side of the frontal surface just below it. Helmet shaped ooecium, small relative to zooid size, closed by zooidal operculum, with granular, imperforate outer covering and a smooth, triangular, proximofrontal surface with a rounded apex ( Fig. 12 View Figure E, F). Small spatulate avicularia with a raised hooded rostrum may occur distally to the zooids ( Fig. 12 View Figure D).

Remarks. Prior to the availability of scanning electron microscopy, Micropora  species were usually lumped together as Micropora coriacea Johnston, 1847  . Winston (2005) distinguished the Western Atlantic species, first noted by Smitt (1873), from M. coriacea  on the basis of its narrow sloping distal tubercles and small ovicells with elevated ectooecial crests.

Distribution. Cape Hatteras to Brazil, Gulf of Mexico, Caribbean.

TABLE 11. Measurements in mm of Micropora acuminata Winston, 2005.

  Lz Wz Lo Wo Lov Wov Lav Wav
N 18 18 18 18 12 12 14 14
Mean 0.497 0.376 0.057 0.127 0.127 0.231 0.101 0.120
SD 0.067 0.050 0.007 0.012 0.012 0.013 0.014 0.025
Min 0.396 0.306 0.045 0.108 0.108 0.216 0.081 0.072
Max 0.684 0.450 0.072 0.144 0.144 0.252 0.126 0.144