Pione gibraltarensis Austin, Ott, Reiswig, Romagosa & G, 2014, n. sp.

• Main Authors: Austin, William C., Ott, Bruce S., Reiswig, Henry M., Romagosa, Paula, G, Neil
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Hadromerida; Clionaidae; Pione; Pione gibraltarensis; Austin; Dome The; Crassostrea gigas
• Online Access: https://zenodo.org/record/6132510; https://doi.org/10.5281/zenodo.6132510

Pione gibraltarensis n. sp. Fig. 5 A–H Etymology. The specific epithet is derived from the type locality, Gibraltar I. (Barkley Sound, BC) where KML 1018 was found. Material examined. Holotype: KML 1018, KML sta. 149 / 76, Gibraltar I., Barkley Sd., BC, (48 º 54.77 ′N, 125 º 15.35 ′W), high tide pool 3 m above low tide level, Aug. 9, 1976, coll. W.C. Austin. Paratype: KML 1019, KML sta. 37 / 79, head of Pendrell Sd., BC, (50 º 17.9 ′N, 124 º 43.0′W), mid intertidal, May 2, 1979, coll. W.C. Austin. Description. Macroscopic features. KML 1018 excavating shell of living mussel (Mytilus californianus Conrad, 1837), in alpha form; papillae not contracted; oscular papilla a low truncated cone about 800 Μm in basal diameter; the orifice diameter and the wall height each about 1 / 3 of the basal diameter; ostia bearing papilla an elevated dome, the height almost equal to the basal diameter which ranged from 0.3–0.7 mm. Around the periphery of the dome 16–20 cellular strands reinforced by tylostyles extend from the base to the top of the dome. Oscular pores range in size from 0.8–1 mm diam; spaced at approximately 6 mm intervals; ostial pores 0.3–0.6 mm diam., spaced at approximately 1 mm intervals. Pores enter erosion pits directly, without canals, erosion pits initially oval about 0.8 x 1.6 mm by 3 mm deep; as increase in size interconnect to form channels; inter chamber pores typically 0.2 mm, some to 0.5 mm diam.; few openings into the interior of the mussel; these 0.2–0.6 mm diam. Colour in life greenish yellow. KML 1019 excavating empty Japanese oyster shells (Crassostrea gigas Thunberg, 1793), in alpha form. Papillae retracted; ostial pores 0.2–0.6 mm diam., oscular pores 0.8–1.2 mm diam., both types on inside and outside surface of oyster. These open directly into excavation chambers; these initially oval about 2.8 x 4 mm diam. but coalesce to become channels; interchamber pores 0.4–0.6 mm diam. Colour in life unknown. Microscopic features. Spicules. Spicule types include tylostyles, acanthoxea, and two classes ...