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BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 75
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Accepted for publication April 4, 1975.
SPATHIPORA MAZATLANICA. A NEW SPECIES OF BURROWING BRYOZOA
(CTENOSTOMATA) FROM MAZATLAN, SINALOA, MEXICO
John D. Soule and Dorothy F. Soule^
Abstract: A new species of burrowing Bryozoa (Ctenostomata) from Mexico, Spathipora
mazatlanica, is described and illustrated. The polypide anatomy of the genus Spatliipora
is determined for the first time.
Although the genus Spathipora was erected by
Fischer in 1866 from material collected off the
French Mediterranean coast, confirmation of its
bryozoan ctenostomatous affinities, in general,
was not made until the work of E. Marcus ap-
peared in 1938. The specimens of Spathipora
available to Marcus from Baia de Santos, Brazil
had evidently suffered considerable cytolysis, since
he was only able to show the cuticle, with the
general morphology of the autozoid, and the at-
tachment of the stolon close to the proximal
(caudal) extremity of the zoid. Marcus also de-
scribed the anatomical features of Terebripora
ramosa d'Orbigny collected from the same locality,
and established that the point of attachment of the
stolon to the zoid was about midway between the
apertural (distal) and caudal (proximal) extrem-
ities, more often closer to the apertural rather
than the caudal end. Subsequent work by Soule
(1950, 1963), Soule and Soule (1968, 1969a,
1969b), and Voigt and Soule (1973) has con-
firmed the Terebripora stn.ictural plan. Silen
(1946, 1947) erected two new genera of burrow-
ing bryozoans, Immergentia and Penetrantia, and
described their anatomy.
In material collected at Mazatlan, Mexico in
1973 we have found well preserved zoaria of
Spathipora. The anatomical details of Spathipora
are available for the first time from whole mounts
and serial sections, and comparisons can be made
with those burrowing bryozoans whose structure
is well known.
FAMILY TEREBRIPORIDAE D'ORBIGNY
1847
Genus Spathipora Fischer 1866
Spathipora mazatlanica, new species
Holotype.
BioStor
