PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Lima (Acesta) beta

Bivalvia - Pectinida - Limidae

Taxonomy

Lima (Acesta) beta was named by Popenoe (1937). Its type specimen is CIT (IP) 3424 and is a 3D body fossil. Its type locality is LACMIP loc. 8198, Santa Ana Mountains, which is in a Turonian delta front siltstone/shale in the Ladd Formation of California.

Sister species lacking formal opinion data

Acesta aequilatera, Acesta cutleri, Acesta goliath, Acesta latens, Acesta watanabei, Acesta amaxensis, L. aspera, L. callovica, L. catalaunica, L. columbiae, L. cometi, L. complanata, L. elpasensis, L. eryx, L. janetae, L. joleaudi, L. kindopeensis, L. paleata, L. papillifera, L. saurassovi, L. soror, L. striatissima, L. swenanderi, L. utahensis, L. wynnei, L. yataensis, L. bittneri, L. brancoi, L. limopsis, L. occidentalis, L. schimperi, L. toarcensis, L. yeovilensis, L. boonei, L. virgulina

Synonymy list

Year	Name and author
1937	Lima (Acesta) beta Popenoe p. 382 figs. Plate 45, figure 5

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia
subclass	Autobranchia	(Groblen 1894)
infraclass	Pteriomorphia	(Beurlen 1944)
—	Ostreomorphi	Ferussac 1822

Rank	Name	Author
—	Ostreioni	Ferussac 1822
—	Ostreata	Ferussac 1822
superorder	Ostreiformii	Ferussac 1822
order	Pectinida	(Gray 1854)
suborder	Anomiidina	Gray 1854
—	Limoidei	(Moore 1952)
superfamily	Limoidea	(Rafinesque 1815)
family	Limidae	Rafinesque 1815
genus	Lima	Adams and Adams 1858
subgenus	Acesta
species	beta

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.

†Lima (Acesta) beta Popenoe 1937

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Diagnosis

Reference	Diagnosis
W. P. Popenoe 1937	Shell moderately large, thin, fragile, pyriform, slightly convex; beaks low; anterior margin nearly straight, excavated dorsally; anterior ear very slightly developed; posterior and ventral margins forming a sweeping regular curve; posterior ear small, ob- liquely truncate; sculpture consisting of narrow radiating ribs toothed on the crests and separated from one another by concave interspaces three to four times wider than the ribs; interrib areas ornamented only by fine growth lines; resilium pit oblique, directed toward the posterior side.