Kampylaster tumulus Mah 2023, n. sp.

• Main Author: Mah, Christopher L.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Asteroidea; Valvatida; Asterinidae; Kampylaster; Kampylaster tumulus; South Atlantic Ocean
• Online Access: https://doi.org/10.5281/zenodo.8090136; http://treatment.plazi.org/id/03C387E8662AFFFFFF68E7CF84CCF906

Kampylaster tumulus n. sp. FIGURE 8A–E Etymology The species epithet tumulus is taken from the Latin for “mound” alluding to this species’ mound-like resemblance. Diagnosis Body thick, broadly mound-shaped, weakly stellate (R/r=1.3–1.6). Surface covered by coarse, round granules, approximately 3 counted along a 1.0 mm line (Fig. 8A). Granules, enlarged cylindrical (bullet) shaped, 3 to 4 at R>1.0 cm, along edge of the inferomarginal plates (Fig. 8D, E). Transverse furrow spine series, 3 to 6, spines widely spaced. Most showing 4 to 5 but approaching 6 spines in larger individuals (R=1.6) (Fig. 8E). Comments This species shares several characters, including the bullet-shaped granules on the marginals, a more angular actinolateral edge, and furrow spine number, with Kampylaster claireae suggesting closer relationship between the deep-water species than with the shallower Kampylaster incurvatus . Occurrence South Atlantic Ocean (−63.05, −14.53), 1000–2000 m. Description Individuals weakly stellate (R/r=1.2–1.4), interradial arcs acute, Body thick and strongly arched (Fig. 8A). Abactinal plates flattened, imbricate, round to polygonal proximally becoming more scale-like distally (Fig. 8A, B). Primary plates flat to weakly convex. Abactinal plates largest proximally smaller and more numerous distally, especially around arm tips. Transition in size between disk and arms abrupt. Granules round, coarse present as continuous cover over abactinal surface, obscuring plate boundaries in uncleaned specimens. At R=1.1, approximately 3 granules are counted along a 1.0 mm line, smaller individuals with smaller granules. Madreporite covered and obscured by granules, weakly defined with a single sinusoidal sulcus. No papulae observed. Marginal plates approximately 12 to 14 per interradius (arm tip to arm tip) at R= 1.1 cm, up to 16 per interradius at R= 1.6 cm. Each plate block-like in shape (Fig. 8B), thick forming approximately 20% of distance between center of oral surface and interradial edge. Observed externally, marginal ...