|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Murchisoniina - Soleniscidae
It was recombined as Soleniscus (Macrocheilus) medialis by White (1884); it was recombined as Sphaerodoma medialis by Girty (1915); it was recombined as Soleniscus (Macrochilina) medialis by Knight (1931); it was recombined as Ianthinopsis medialis by Yochelson and Saunders (1967).
|Year||Name and author|
|1860||Macrocheilus medialis Meek and Worthen p. 466|
|1884||Soleniscus (Macrocheilus) medialis White p. 187 figs. pl. 8 f. 15-16|
|1915||Sphaerodoma medialis Girty p. 199|
|1931||Soleniscus (Macrochilina) medialis Knight p. 217–219 figs. pl. 25 f. 4a-c; pl. 27 f. 9|
|1967||Ianthinopsis medialis Yochelson and Saunders pp. 101 – 102|
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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.
|J. B. Knight 1931||Of moderate size; sub-oval, with relatively long body whorl; sides of spire concave at neanic and markedly convex at ephebic stages; sutures but slightly impressed; suture of the final whorl of fully grown individuals more oblique than those of the younger whorls; inductura tremendously thickened just within the aperture of fully grown individuals and only to a less degree in younger ones; upper part of the thickened inductura of some specimens marked with faint, vertical grooves; siphonal folds distinct, bordered posteriorly by a rather narrow, deep groove in the inductura, the latter swelling out above the groove into the semblance of a low, rounded fold; siphonal channel wide and shallow; surface smooth, almost polished, growth lines faint; color in life seemingly uniform dark gray, almost black.|