Hippomonavella brasiliensis Ramalho et al., 2009

(Fig. 7 A–C)

Hippomonavella brasiliensis Ramalho et al., 2009: 236, fig. 2.

Material examined. Parcel do Carpinteiro, MNRJ-1178, (fertile), MNRJ-1179, (unfertile): am24 station2, 32°09.406’S, 51°28.318’W, 31 July 2009; MNRJ-1217, am30 station 0 1, 32°14.300’S, 51°46.630’W, 25 meters depth; MNRJ-1218, am05, 32°16.894’S, 51°48.454’W, 24 meters depth, 28 March 2007.

Description. Colony unilamellar (Fig. 7 A). Autozooids disposed in quincunx, rectangular, longer than wide (473–923 (705) µm long x 255–423 (348) µm wide). Frontal wall crenulated, imperforate except for rounded areolar pores (13-17). Orifice aproximately quadrate (109–154 (133) µm long x 127–192 (162) µm wide) with poster almost even with a pair of prominent downward condyles (Figs. 7 A–B).

Suboral avicularium (73–91 (81) µm long) directed downwards and slightly to the side; mandible triangular, rounded at the tip; crossbar complete; two small rounded pores, one at each side of the avicularium (Fig. 7 C).

Oecium large (182–218 (200) µm long x 254–327 (285) µm wide) almost submersed, not prominent, frontal wall perforated with small rounded pores forming one marginal line and others spread on the surface (Fig. 7 C); opening dependent of maternal zooid orifice.

Geographic distribution. Rio de Janeiro (Ramalho et al. 2009) and Rio Grande do Sul States (Parcel do Carpinteiro - present study).

Remarks. Comparing RS material with type material (MNRJ-073, Rio de Janeiro), the latter one has smaller autozooids (510–637 (586) µm long x 245–353 (295) µm wide), prominent and smaller oecia (127–147 (140) µm long x 157–186 (171) µm wide). Therefore, it is believed these specimens are H. brasiliensis and its distribution is expanded from Southeast to South Brazil.