Latrunculia (Latrunculia) tetraverticillata Mothes, Campos, Eckert & Lerner, 2008, sp. nov.

• Main Authors: Mothes, Beatriz, Campos, Maurício, Eckert, Rafael, Lerner, Cléa
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Poecilosclerida; Latrunculiidae; Latrunculia; Latrunculia tetraverticillata; Antarc*; Antarctic
• Online Access: https://doi.org/10.5281/zenodo.5694750; http://treatment.plazi.org/id/03DD5A024F00FF96FF6EFBEEFE9FFE63

Latrunculia (Latrunculia) tetraverticillata sp. nov. (Fig. 2 A–E; Tab. I) Material examined. Holotype: MCNPOR 3695, Brazil, off Santa Catarina State coast (29º11'16"S, 47º54'16"W), 420 m depth, substrate of pebbles, bottom temperature 9°C, salinity 34 ‰, 24.IV.1997, R/V "Antares” coll. Paratype: MCNPOR 3641 (microscope-slide); data similar to that of the holotype. Comparative material . Latrunculia (Latrunculia) brevis Ridley & Dendy, 1886, collected by HMS “Challenger” Expedition, off Rio de la Plata, Argentina, slide BMNH 1887.5.2.269 (holotype). Latrunculia (Latrunculia) biformis (Kirkpatrick, 1908), collected by Antarctic Terra Nova Expedition, locality unknown, slide BMNH 1910.26.154a. Latrunculia (Latrunculia) bocagei Ridley & Dendy, 1886, collected by HMS “Discovery” Expedition, Falkland Islands, slide BMNH 1887.5.2.237 (holotype). Description . Small encrusting sponge, 0.7 x 0.6 x 0.1 cm (Fig. 2 A). Surface slightly velvety to the touch, with a single conical, volcano-shaped oscule, 0.1 cm in diameter. Preserved material friable in consistency. External colour in life unknown; in preservative external and internal colour creamy white. Skeleton. Ectosome with a palisade of anisodiscorhabds perpendicularly arranged (Fig. 2 B). Subectosomal region 90–210 μm thick, with a confused halichondroid arrangement of single strongyloxeas tangentially oriented and common anisodiscorhabds scattered through. The choanosomal skeleton is formed by a very irregular, polygonal reticulation (85–160 μm) formed by tracts of strongyloxeas (30–70 μm) with scarce spongin reinforcement. Spicules. Magascleres (Fig. 2 C–D): Strongyloxeas smooth, straight, anisodiametric strongyloxeas, slightly fusiform, occasionally may bear a tyle, apical extremity hastate. Microscleres (Fig. 2 E): Anisodiscorhabds consisting of a straight, stout shaft, with a reduced base ornamented with smooth spines, bent downwards. There are only a few isolated spines above the manubrium, and these can vary on abundance and disposition. Two central ...