Kampylaster Koehler 1920
Kampylaster Koehler, 1920 Koehler, 1920: 136, Fisher 1940: 250; Bernasconi 1973a: 344; A.M. Clark 1993: 220; O’Loughlin & Waters 2004: 22. Diagnosis Arms five. Body thick, pentagonal to weakly stellate (R/r=1.0–2.2), strongly arched (dome-shaped). Abactinal surface composed of imbricate flattene...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2023
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| Online Access: | https://doi.org/10.5281/zenodo.8092127 http://treatment.plazi.org/id/03C387E86624FFF6FF68E532838EF944 |
| Summary: | Kampylaster Koehler, 1920 Koehler, 1920: 136, Fisher 1940: 250; Bernasconi 1973a: 344; A.M. Clark 1993: 220; O’Loughlin & Waters 2004: 22. Diagnosis Arms five. Body thick, pentagonal to weakly stellate (R/r=1.0–2.2), strongly arched (dome-shaped). Abactinal surface composed of imbricate flattened to weakly convex plates, larger plates proximally becoming smaller distally. Abactinal and marginal plates covered by round to cylindrical/bullet-shaped granules, evenly distributed over abactinal and lateral surface covering boundaries between plates. Marginal plates forming crenulate margin. Actinal surface with one to three short, blunt spinelets. Furrow spines, 2 to 5 in transverse series. Superambulacrals and superactinal plates absent. Comments Kampylaster has received little discussion since its description (Koehler 1920), which seems largely due to its lack of shared characters with other members of the Asterinidae, including internal skeletal ossicles such as the superambulacrals and superactinals (O’Loughlin & Waters 2004). Koehler (1920) made early comparisons between Kampylaster and Tremaster which have not found support (O’Loughlin & Waters 2004; Mah & Foltz 2011b). Molecular phylogenetic work (Mah & Foltz 2011b) supported Kampylaster with the other Antarctic asterinid, Astrotholus antarcticus as members of a monophyletic clade, described herein. Key to Kampylaster spp. (0) Marginal plates and lateral edge with round to cylindrical granules in irregular clusters, inferomarginal plates with rounded, actinolateral edge with round, close-set granules extending onto the distal actinal intermediate areas adjacent to the inferomarginals. Granules round, homogeneous in size and shape, close set. Body weakly stellate (R/r=1.0 at R=1.1.7)). Present at depths 6–935 m. Kampylaster incurvatus Koehler 1920 (0’) Inferomarginal plates with distinct spine series, cylindrical or bullet-shaped, 2–3× the length of those on abactinal granules in K. tumulus , along actinolateral edge. Inferomarginals with a ... |
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