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Bokotorthis minuta
Taxonomy
Bokotorthis minuta was named by Popov and Cocks (2014). Its type specimen is NMW 2001.38G.42, a valve (ventral internal mould), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Bokotorthis minuta Popov and Cocks pp. 731 - 733 figs. 20A–K, N–P |
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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.
†Bokotorthis minuta Popov and Cocks 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Popov and L. R. M. Cocks 2014 | Shell small for genus, strongly dorsibiconvex, with broadly uniplicate anterior commissure. Ventral median sulcus and dorsal median fold originating anteriorly to mid-length. Radial ornament with up to 24 ribs including up to five ribs in ventral sulcus and up to six ribs in dorsal median fold. Ventral muscle field large, strongly impressed, more than twice as long as wide, with adductor scars elevated on a high septum. Cardinal process robust, almost completely occupying the notothyrial cavity.
Shell slightly dorsibiconvex to subequally biconvex, transverse, suboval, 60–70% as long as wide and about 75% as thick as long. Hinge line 70–75% as wide as the shell; cardinal extremities rounded. Anterior commissure broadly uniplicate. Ventral valve moderately convex, with a shallow sulcus originating anterior to the mid-length and terminating in a high, semioval tongue directed almost orthogonally to the commissural plane. Interarea low, triangular, apsacline. Dorsal valve moderately and evenly convex, with a low median fold originating at mid-length. Dorsal interarea linear, almost orthocline. Radial ornament costate with up to 24 rounded ribs, including up to six on the dorsal median fold and five ribs in the ventral sulcus. Ventral interior with strong teeth supported by subparallel dental plates strongly thickened at the base. Narrow muscle field deeply impressed, more than twice as long as wide, extending to mid-length, the diductor scars completely separated by the adductor scars, which are elevated anteriorly on a high septum. Ventral mantle canal system saccate, with short, divergent vascula media and strongly impressed vascula genitalia . Dorsal interior with low and very narrow notothyrial platform mainly occupied by a bulbous, strongly thickened cardinal process, high, anteriorly directed brachiophores and deep sockets. Dorsal adductor field narrow and deeply impressed posteriorly, extending anteriorly to mid-length and bisected by a faint median ridge which fades anteriorly. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Collections
No collection or age range data are available