Alvania tessellata Schwartz in Weinkauff, 1868 |
Mediterranean, from Algeria to at least the Adriatic. Detritus feeder. Close to pagodula and spinosa, but there is no published figure of this species. J. J. van Aarsten, who studied a specimen from the British Museum labelled “Rissoa tessellata (Schw.) = Philippiana Jeffr. = pagodula BDD. Algier, M. Joly.”, describes the shell as being much larger than usual spinosa and having a more pronounced sculpture (Basteria 40, 1976). 3m deep, Pakoštane, Zadar Comitat, Dalmatia, Croatia. 2,2mm. |
« Testa solida flavido-alba, languida, conico-oblonga; spira gracilis acuminata; anfractus septum valde convexi, carinati sutura profunde divisi, tres primi embryonales unicarinati, ultimus cingulis elevalis tribus (penultimus duobus) costique longitudinalibus 11-12 rectis, abbreviatis distincte clathratus, in basi cingulis duobus laevibus instructus; apertura rotundata; labrum subsinuatum, extus varice laevi incrassato ornatum, intus laevigatum. » – Schwarz in H. C. Weinkauff: Die Conchylien des Mittelmeeres, ihre geographische und geologisches Verbreitung Bd.2, Cassel 1868, p.311. Same spot. 2mm. |
The sculpture and the microsculpture are coarse, on the protoconch as well as on the teleoconch. 35-50m deep, Málaga, Andalucia, S. Spain. 3,5mm. |
— back to Rissoidae — |