Clathrinidae Minchin, 1900

Van, Rob W. M. & De, Nicole J., 2018, Calcareous sponges of the Western Indian Ocean and Red Sea, Zootaxa 4426 (1), pp. 1-160 : 22

Family Clathrinidae Minchin, 1900

Remarks. Since the Systema Porifera classification of the order Clathrinida (see Borojević et al. 2002a), substantial changes of the contents of the family Clathrinidae have been proposed (Klautau et al. 2013) and elaborated (Klautau et al. 2016). The genus Clathrina Gray, 1867 has been subdivided into five distinct genera, Arturia Azevedo et al., 2017 (pro Arthuria Klautau et al., 2013 ), Borojevia Klautau et al., 2013 , Ernstia Klautau et al., 2013, Brattegardia Klautau et al., 2013 , and Clathrina s.s.. The only other genus of the family recognized in the Systema Porifera, genus Guancha Miklucho-Maclay, 1868 , has been subsumed into Clathrina s.s., because its type species Guancha blanca Miklucho-Maclay, 1868 has been transferred to Clathrina sensu Klautau et al., 2013 . One former Guancha species, G. tetela Borojević & Peixinho, 1976 was recently reassigned to a new genus, Nicola Condór-Luján & Klautau, 2016 . The classification is still in a flux, as it was recently revealed that the name Arthuria was preoccupied by two Mollusca genera (Polyplacophora and Pulmonata ). It has just now been replaced by Arturia , but it is still complicated by our discovery (see below) that Arturia is probably not a monophyletic genus.

The family contents are also possibly overlapping with other families of the order Clathrinida , awaiting an overhaul based on a phylogenetic analysis of molecular sequence data. We will here follow the classification as presented in Klautau et al. 2013, with above listed recognized genera presented in alphabetical order ( Brattegardia excepted as it was not represented in our material).

Below we will use the word ‘tubuli’ to describe the anastomosed ascon tubes of Clathrinidae species to avoid confusion with the tubes of tubular habitus in some species with a pseudoatrium. We maintain the term ‘watercollecting tubes’ for those wider tubuli leading to oscules.