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Wilkingia walkeri

Bivalvia - Sanguinolitidae

Taxonomy
Allorisma walkeri was named by Weller (1897). It is a 3D body fossil.

It was recombined as Wilkingia walkeri by Busanus and Hoare (1991) and Hoare (1993).

Sister species lacking formal opinion data
W. dubium

Synonymy list
YearName and author
1897Allorisma walkeri Weller p. 265 figs. pl. 20 f. 6–7
1915Allerisma walkeri Girty p. 108 figs. pl. 10 f. 1-2
1991Wilkingia walkeri Busanus and Hoare p. 477 figs. 6.15 – 6.16
1993Wilkingia walkeri Hoare pp. 392 – 394 figs. 7.14 – 7.18

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
subclassAutobranchia(Groblen 1894)
RankNameAuthor
infraclassHeteroconchia(Gray 1854)
—CardiomorphiFerussac 1822
—CardioniFerussac 1822
—CardiidiaFerussac 1822
superfamilyGrammysioideaMiller 1877
familySanguinolitidaeMiller 1877
subfamilyUndulomyinaeAstafieva-Urbajtis 1973
genusWilkingiaWilson 1959
specieswalkeri(Weller 1897)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Wilkingia walkeri Weller 1897
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Diagnosis
ReferenceDiagnosis
J. W. Busanus and R. D. Hoare 1991Wilkingia with subrectangular shape; beaks located about one-fourth length from anterior margin.

Wilkingia walkeri is most similar to W. clavata (McChesney, 1859) but differs in having a relatively longer, subrectangular form with a greater length/height ratio. Wilkingia maxvillenis (Whitfield, 1882b), W. snideri (Elias, 1957), and W. maynardwhitei (Elias, 1957) have less spatulate posterior extremities than W. walkeri. Wilkingia cuyahoga (Herrick, 1888b) is similar and may be conspecific.
R. D. Hoare 1993Wilkingia with dorsal and ventral margins subparallel; posterior margin evenly convex, more sharply curved meeting dorsal margin than ventral margin; anterior margin produced, curving sharply dorsally; lunule present, escutcheon not visible; beaks about one-seventh of length from anterior extremity; valve surface flattened centrally, umbonal ridge not prominent; surface ornamented with numerous comarginal undulations.