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Purella

Maikhanellidae

Taxonomy
Purella was named by Missarzhevsky (1974) [Sepkoski's age data: V N-Da-u Cm Atda-u Sepkoski's reference number: 885,1006,1030]. It is not extant. Its type is Purella cristata. It is the type genus of Purellidae.

It was assigned to Helcionellidae by Missarzhevsky (1989); to Purellidae by Vassiljeva (1990); to Purellinae by Feng et al. (2001); to Mollusca by Sepkoski (2002); and to Maikhanellidae by Ponder et al. (2007), Parkhaev and Demidenko (2010), Devaere et al. (2013) and Kouchinsky et al. (2017).

Synonyms
Synonymy list
YearName and author
1974Purella Missarzhevsky
1980Rozanoviella Missarzhevsky p. 25
1982Maikhanella Voronin et al.
1986Mirusilites He and Yang
1988Jinkenites Yu p. 304
1989Purella Missarzhevsky p. 174
1989Majkhanella Missarzhevsky p. 179
1990Purella Vassiljeva
1990Rozanoviella Vassiljeva
1992Maikhanella Bengtson pp. 403 – 404
2001Purella Feng et al.
2001Maikhanella Feng et al. p. 206
2002Rozanoviella Parkhaev p. 35
2002Maikhanella Sepkoski
2002Purella Sepkoski
2002Rozanoviella Sepkoski
2007Maikhanella Ponder et al. p. 137
2007Purella Ponder et al. p. 137
2010Purella Parkhaev and Demidenko p. 994
2013Purella Devaere et al. p. 31
2017Purella Kouchinsky et al. p. 364

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
RankNameAuthor
superphylumLophotrochozoa
phylumMollusca
familyMaikhanellidae
genusPurella

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.

G. †Purella Missarzhevsky 1974
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Purella antiqua Kiær 1916
Purella arcana Val'kov 1987
Purella atypica Missarzhevsky 1980
Purella cristata Missarzhevsky 1974
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Invalid names: Purella dzhandica Pelman et al. 1990 [synonym]
Purella gracilis Voronin et al. 1982
Purella insueta Missarzhevsky and Mambetov 1981
Purella layracensis Kerber 1988
Purella squamulosa Qian and Bengtson 1989
Invalid names: Maikhanella Voronin et al. 1982 [synonym], Rozanoviella Missarzhevsky 1980 [synonym]
Diagnosis
ReferenceDiagnosis
P. Y. Parkhaev and Y. Demidenko 2010"Shell cap-shaped, low conical, elongated. Apex displaced anteriorly, sometimes up to level of anterior apertural margin. Posterior field convex, anterior field slightly concave below aperture, straight in other part. Lateral fields straight or slightly concave. Aperture egg-shaped or pyriform, with wide posterior and narrow anterior parts. Posterior shell field bears prominent posterior mid-dorsal buttress, running from apex to posterior apertural margin. Anterior buttress faint or absent. External shell ornamentation presented by elongated scales aligned in comarginal rows. Internal mold also bears mid-dorsal buttresses."
L. Devaere et al. 2013Shell with slightly elongate aperture and height somewhat shorter than or equal to length of aperture; apex shifted to the proximal margin; shell profile of proximal side slightly concave; distal side convex with slight ridge along sagittal line. Surface of the shell corresponding to comarginal elongated scales (emended from Qian and Bengtson, 1989).