Akatopora leucocypha (Marcus, 1937)

Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81 : 20

publication ID

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.6084718

persistent identifier

https://treatment.plazi.org/id/19362D2E-2006-FFA3-BBA5-FEB3FC55FA1D

treatment provided by

Plazi

scientific name

Akatopora leucocypha (Marcus, 1937)
status

 

Akatopora leucocypha (Marcus, 1937)

( Fig. 9 View FIGURE 9 ; Table 8 View TABLE 8 )

Crassimarginatella leucocypha Marcus, 1937: 46 , pl. 8, fig. 20A, pl. 9, figs 20B, C; 1938: 20, pl. 3, figs 8A, B. Conopeum reticulum (part): Osburn 1940: 351.

Antropora leucocypha: Shier 1964: 613 ; Winston 1982: 123, fig. 36; Winston & Håkansson 1986: 9, figs 14–16. Akatopora leucocypha: Winston & Vieira 2013: 110 , fig. 7.

Material examined. VMNH no. 70607, 70608; USNM no. 1283234.

Description. Colonies encrusting shells of living and dead gastropods, including very small gastropods found in Oculina rubble ( Fig. 9 View FIGURE 9 B). Zooids oval to irregular in shape. Lateral walls with scattered tubercles. Frontal membrane underlain by a distally narrowing cryptocystal rim, with granules arranged along radial rows ( Fig. 9 View FIGURE 9 E, F). Well-calcified basal walls with thick internal vertical ridges. Triangular or rounded kenozooids with similarly patterned cryptocyst found between autozooids ( Fig. 9 View FIGURE 9 A, C). Small avicularia with semicircular mandibles may also occur. Ooecia indicated by a narrow crescent of calcification ( Fig. 9 View FIGURE 9 G).

Remarks. Gordon (1986) suggested that two species of Antropora , A. leucocypha and A. tincta should be included in Akatopora because, like the type species Akatopora clausentina Davis, 1934 , zooids have a reduced cryptocyst, enlarged opesia and small kenozooids in the interzooidal angles. This decision was followed by Winston & Vieira (2013). Akatopora leucocypha is distinguished by its lack of avicularian condyles and in having a semicircular avicularian mandible (see Marcus 1937, pl. 8, fig. 20A). In Florida Akatopora leucocypha is common on gastropod shells from intertidal to continental shelf depths.

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

TABLE 8. Measurements in mm of Akatopora leucocypha (Marcus, 1937).

  Lz Wz Lop Wop
N 18 18 18 18
Mean 0.391 0.271 0.243 0.145
SD 0.059 0.038 0.035 0.018
Min 0.288 0.216 0.198 0.126
Max 0.486 0.360 0.324 0.180
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF