Paralophaster godfroyi ( Koehler 1912a )

Mah, Christopher L., 2023, New Genera, Species, and observations on the biology of Antarctic Valvatida (Asteroidea), Zootaxa 5310 (1), pp. 1-88 : 64-66

publication ID

https://doi.org/ 10.11646/zootaxa.5310.1.1

publication LSID

lsid:zoobank.org:pub:C6664128-1B4E-40C8-80E8-6D09AB49CB30

DOI

https://doi.org/10.5281/zenodo.8090218

persistent identifier

https://treatment.plazi.org/id/03C387E8-660E-FFA2-FF68-E2FE858AFB1A

treatment provided by

Plazi

scientific name

Paralophaster godfroyi ( Koehler 1912a )
status

 

Paralophaster godfroyi ( Koehler 1912a) View in CoL View at ENA

FIGURE 21A–F View FIGURE 21

Solaster godfroyi Koehler, 1912a: 50 View in CoL ; 1912b: 154.

Solaster asperatus Koehler 1920: 157 View in CoL .

Paralophaster godfroyi Fisher 1940: 175 View in CoL ; A.M. Clark 1962: 50.

Paralophaster asperatus Fisher 1940: 175 View in CoL , 177.

Paralophaster godefroyi asperatus A. M. Clark 1962: 53 ; 1997: 190.

Diagnosis

Body stellate (R/r=2.3–4.1) Fig. 21A View FIGURE 21 ). Abactinal paxillar spinelets, 4 to 10 these ending in a single point ( Fig. 21B View FIGURE 21 ). Abactinal paxillae pedunculate, spinelets equal to or of greater than pedicle column height. Superomarginal plates evident, these paxillae shorter (25% of inferomarginal height) and smaller but articulated on base of inferomarginal paxillae which is four times as thick with broad, wide base, appearing to be intercalated between the larger inferomarginal plates. Inferomarginals 15 at R=2.5 to 23 at R= 3.6 cm ( Fig. 21C, E View FIGURE 21 ). Furrow spines, mostly 3, then 2 distally in palmate fans, each cluster of furrow spines arranged in parallel along tube foot groove ( Fig. 21D, F View FIGURE 21 ). Subambulacral spines, 3 to 6, mostly 4 to 5 in transverse series ( Fig. 21F View FIGURE 21 ). Subambulacral spines without serrations. Actinal plates, 4–10, slender, elongate. Adambulacral plates widely separated by tissue.

Comments

Variation in Paralophaster godfroyi has been addressed by Fisher (1940) and by A.M. Clark (1962) who comprehensively reviewed specimens of P. godfroyi and synonymized Paralophaster godfroyi meseres Fisher, 1940 with Paralophaster godfroyi asperatus ( Koehler, 1920) . She outlines in the diagnostic key that the distinction between P. godfroyi asperatus and typological godfroyi is based on whether small sized individuals (R<20 mm) show spines with one to many additional lateral points or serrations. Comparison of spine types from Koehler (1920) and especially diagrams by A.M. Clark (1962) suggest that the variation of serrations along the lateral spine edge encompasses both subspecies, including godfroyi and asperatus . The synonymy of Paralophaster godfroyi asperatus implies that spines of the type species from Koehler (1920) are not identical with those as recognized by Koehler (1912a). This is inconsistent with Koehler (1912a) which lacks diagrams and descriptions of the serrations on these spinelets. A.M. Clark (1962) shows a full range of spinelet types, those with serrations and those without, which encompasses the variation documented by Koehler (1920) for Solaster asperatus and Solaster godfroyi . Thus, Solaster asperatus is a synonym of Solaster (and thus Paralophaster ) godfroyi .

Occurrence

Antarctic Peninsula region, Off Queen Mary Land, Bellinghausen Sea, Enderby Land eastwards to 178.5 W in the Ross Sea. 70– 2450 m.

Material Examined

USNM E13472 , Between Wiencke Island and Danco Coast , Gerlache Strait, −64.8417, −63.25, 283 m. Coll. R/V Eastwind (D.F. Squires & D.L. Pawson), 29 Jan. 1966. 1 dry spec. R=7.5 r=2.0.

USNM E51734 , South of Lavoisier Island, Biscoe Islands , Antarctic Peninsula . −66.3567, −66.7725, 70–106 m. Coll. R/V Hero , USAP, 1 March 1973. 1 dry spec. R=5.3 r=1.5 (with comatulid crinoid ossicles in gut cavity). GoogleMaps

USNM E53510 , Arthur Harbor, Anvers Island , Palmer Archipelago , Antarctic Peninsula . −64.789, −64.1162, 90–110 m. Coll. R/V Hero , USAP, 20 Feb. 1973. 1 dry spec. R=2.9 r=1.3. GoogleMaps

USNM 1136593 , Tierra del Fuego, Strait of Magellan, Tierra del Fuego, −52.508, −67.233, 82 m. Coll. USAP, University of Southern California, 14 Feb. 1964. 1 dry spec. R=4.1 r=1.5. GoogleMaps

USNM 1570993 , West of Franklin Island, Ross Sea , Southern Ocean . −76.525, 174.933, 445–448 m. Coll. R/V Eltanin, USAP, 20 Jan. 1967. 2 dry specs. R=4.3 r=1.0, R=4.2 r=1.0. GoogleMaps

Kingdom

Animalia

Phylum

Echinodermata

Class

Asteroidea

Order

Valvatida

Family

Solasteridae

Genus

Paralophaster

Loc

Paralophaster godfroyi ( Koehler 1912a )

Mah, Christopher L. 2023
2023
Loc

Paralophaster godefroyi asperatus A. M. Clark 1962: 53

Clark, A. M. 1997: 190
Clark, A. M. 1962: 53
1962
Loc

Paralophaster godfroyi

Clark, A. M. 1962: 50
Fisher, W. K. 1940: 175
1940
Loc

Paralophaster asperatus

Fisher, W. K. 1940: 175
1940
Loc

Solaster asperatus

Koehler, R. 1920: 157
1920
Loc

Solaster godfroyi

Koehler, R. 1912: 50
Koehler, R. 1912: 154
1912
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF