Akatopora leucocypha ( Marcus, 1937a )

Almeida, Ana C. S., Souza, Facelucia B. C., Farias, Jamile, Alves, Orane F. S. & Vieira, Leandro M., 2018, Bryozoa on disarticulated bivalve shells from Todos os Santos Bay, northeastern Brazil, with the description of two new species, Zootaxa 4434 (3), pp. 401-428 : 404-405

Akatopora leucocypha ( Marcus, 1937a)

( Fig. 3A, B ; Table 2)

Crassimarginatella leucocypha MARCUS, 1937A: P. 46, PL. 8, fIg. 20A, PL. 9, fIg. 20B, C; 1938, P. 20, PL. 3II, fIg. 8A, B.

Akatopora leucocypha : WINSTON & VIEIRA, 2013: P. 110, fIg. 7 (CUM SYN.).

Akatopora leucocypha : ALMEIDA et al., 2015A: P. 3.

Material examined. UFBA 1632, on valve of Dallocardia muricata . UFBA 1634, UFBA 1640, UFBA 1642, on valves of Pinctada imbricata .

Description. Colony encrusting ( Fig. 3A ), unilaminar. Autozooids oval to hexagonal. Opesia oval, comprising three-fourth of zooidal length, surrounded by a beaded, crenulate cryptocyst proximally and laterally; gymnocyst scarcely evident in frontal view. Triangular or rounded kenozooids ( Fig. 3B , arrows), with cryptocyst similar to the one in autozooids, placed between autozooids. Ovicell not observed.

Remarks. Akatopora leucocypha was redescribed by Winston & Vieira (2013). It is commonly found on hard substrata, including shell fragments ( Winston & Håkansson 1986; Winston & Vieira 2013).

Distribution. Western Atlantic: North Carolina (Capes Hatteras) to Brazil (Bahia, São Paulo and Paraná) ( Winston & Håkansson 1986; Vieira et al. 2008; Winston & Vieira 2013; Almeida et al. 2015a).

Figures

FIGURE 3. A, B. Akatopora leucocypha (MARCUS, 1937), UFBA 1632. A. OVERVIEW Of A COLONY. B. CLOSE-UP SHOWINg AUTOZOOIDS AND KENOZOOIDS (ARROWS). C, D. Licornia Aff. diadema (BUSK, 1852), UFBA 1626. C. BIfURCATINg BRANCH AND A TUBULAR HOOKED RHIZOID (ARROW). D. ENLARgEMENT Of AUTOZOOIDS, SHOWINg PADDLE-SHAPED MEDIAL OPESIAL SCUTA (ARROW), LATERAL (CIRCLE) AND fRONTAL (DASHED CIRCLE) AVICULARIA, AND TUBULAR SMOOTH RHIZOID (DASHED ARROW). E, F. Reptadeonella brasiliensis ALMEIDA, SOUZA, SANNER & VIEIRA, 2015, UFBA 1636. E. GROUP Of AUTOZOOIDS. F. CLOSE-UP Of SOME AUTOZOOIDS, SHOWINg THE SUBORAL AVICULARIUM, AREOLAR PORE (ARROW) AND SPIRAMEN (CIRCLE). SCALE BARS: A, 500 µM; B–E, 200 µM; F, 100 µM.