Schizomavella mamillata ( Hincks, 1880 )

Reverter-Gil, Oscar, Souto, Javier, Novosel, Maja & Tilbrook, Kevin J., 2015, Adriatic species of Schizomavella (Bryozoa: Cheilostomata), Journal of Natural History 50, pp. 281-321 : 308

Schizomavella mamillata ( Hincks, 1880)

( Figure 12 ; Table 11)

Schizoporella linearis var. mamillata Hincks, 1880: 248 .

Schizomavella linearis var. mamillata: Gautier 1962: 143 .

Schizomavella mamillata: Gautier 1958: 199 ; Hayward and McKinney 2002: 59, fig. 27 A – C; Novosel 2007: 65, fig. 28C, D.

Material examined

CNHM Inv. br. 69: St. 16, Korčula Island (Sika), 42°94.973 N, 17°16.026 E, 22 April 2004, 30 – 40 m.

MNCN 25.03 /3917: St. 16, Korčula Island (Lucnjak), 42°94.973 N, 17°16.026 E, 24 April 2004, 15 – 20 m ( Figure 12B ) .

MNCN 25.03 /3918: St. 17, Pelješac, 42°94.612 N, 17°28.522 E, 23 April 2005, 30 – 40 m ( Figure 12A ) .

Remarks

The Adriatic material studied here fully matches the description and illustrations of Schizomavella mamillata given by Hayward and McKinney (2002), who selected a lectotype for the species. It is noticeable that the autozooidal operculum of the material studied here has a median prominence running proximo-distally, which can be indicative of a strengthening structure, within or below the operculum. This structure has not been observed in other species treated here.

Schizomavella mamillata seems to be common throughout the shallow waters of the Mediterranean, but it is also present in several localities along the Portuguese coast ( Reverter-Gil et al. 2014). In the Adriatic, it has only been recorded in recent years: in Jabuka Islet ( Zavodnik et al. 2000), Rovinj ( Hayward and McKinney 2002), Lastovo and Prvić Islands ( Novosel et al. 2004), and several other localities along the Croatian coast, between 10 and 45 m depth ( Novosel 2007).

Figures

Figure 12. Schizomavella mamillata. (A) Group of zooids (MNCN 25.03/3918, St. 17, Pelješac); (B) autozooid showing the operculum (MNCN 25.03/3917, St. 16, Korčula Island).