Pinulasma Reiswig & Stone, 2013

Reiswig, Henry M., 2018, Four new species of Hexactinellida (Porifera) and a name replacement from the NE Pacific, Zootaxa 4466 (1), pp. 124-151 : 128

Genus Pinulasma Reiswig & Stone, 2013

Type species: Pinulasma fistulosum Reiswig & Stone, 2013:15 by original designation.

Genus diagnosis. Chonelasmatinae of funnel form with hollow tubular, sometimes branching fistules covering the lateral body surface, produced by crenulate growth at atrial margin. Fistules open to the atrial cavity but in life closed distally by dense network of unfused spicules or open by small parietal oscula; after death fistules also open distally. Primary layer with longitudinally elongate rectangular meshes with transverse-radial connecting beams aligned to form dictyonal lamellae; longitudinal strands present. Thin secondary cortices developed both on dermal and atrial sides with shallow epirhyses but no aporhyses. Dermalia and atrialia are pentactins or pinular hexactins with proximal rays of greatly varying length. Other megascleres include pentactins, regular hexactins, diactins, tauactins, one or two classes of scopules, and uncinates. Microscleres are mainly discohexactins and oxyhexactins or discohexasters and oxyhexasters; rare hemidiscohexasters, hemioxyhexasters or oxyhexactins may occur (Modified from Reiswig & Stone 2013).