A new cheilostome bryozoan genus, Abditoporella (Hippoporidridae), from the eastern Pacific Author Sosa-Yañez, Armando Author Vieira, Leandro M. Author Solís-Marín, Francisco A. text Zootaxa 2015 3994 2 275 282 journal article 10.11646/zootaxa.3994.2.7 a13ec7ac-7695-45b7-8204-b618571f8d78 1175-5326 232039 F3C277E5-22A7-4C18-9AFB-4E045C88BF05 Genus Abditoporella Sosa-Yañez, Vieira & Solís-Marín n. gen. Type species. Abditoporella dimorpha n. sp. Diagnosis. Colony encrusting, uni- to multilaminar. Zooids polygonal; frontal shield with scattered frontal pseudopores. Orifice cleithridiate (keyhole-shaped) with lateral condyles. Oral spines absent. Avicularia adventitious or interzooidal. Embryos brooded endozooidally in female zooids. Interzooidal communications via septular pores. Etymology . From Latin abditus , hidden, and - porella , a common suffix for Bryozoa, alluding to the inconspicuous ooecium. Remarks. This new genus is distinguished from other Hippoporidridae in having both a pseudoporous frontal shield and endozooidal ovicells. These morphological characteristics lead us to include another species previously assigned to Hippopodinella , as Abditoporella turrita ( Osburn, 1952 ) n. comb. Female zooids are dimorphic in A. dimorpha n. sp. , but skeletal dimorphism is not evident in A. turrita ( Osburn 1952 ) . Abditoporella n. gen. shares some of the morphological features of both Odontoporella and Hagiosynodos . Odontoporella has a similar orifice, avicularia and internally buttressed recesses for communication pores (see Gordon 1989 ), but is distinguished from Abditoporella n. gen. in having a non-pseudoporous frontal shield with radial ridges and associated areolar pores, and no externally distinguishable zooidal sexual dimorphism ( Carter & Gordon 2007 ). The campanulate orifice and the pseudoporous frontal shield of Abditoporella resemble that in the cheiloporinid genus Hagiosynodos ( Bishop & Hayward 1989 ; Hayward & McKinney 2002 ), but this genus has conspicuous ooecia closed by the zooidal operculum. Although avicularia were not noted in Hagiosynodos by Hayward & McKinney (2002) , they are present in the genus ( Bishop & Hayward 1989 ). The combined morphological similarities among Abditoporella n. gen . , Hagiosynodos and Odontoporella lead us to accommodate these genera in the same family, Hippoporidridae .