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Taxonomy
Obolus maccullochi was named by Reed (1917) [Obolus Maccullochi
= Lingula Ramsayi, Salter, Davidson 1883. Mon. Brit. Foss. Brack., vol. v, Silur. Suppl., p. 206, pl. xvii, figs. 7-11 1 (only the specimens from Craighead).].
It was recombined as Palaeoglossa maccullochi by Candela and Harper (2014).
It was recombined as Palaeoglossa maccullochi by Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Obolus maccullochi Reed pp. 799 - 800 figs. Plate I, figs. 9-13 |
| 1962 | Obolus maccullochi Williams p. 80 |
| 2014 | Palaeoglossa maccullochi Candela and Harper pp. Supplement 1 |
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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.
†Palaeoglossa maccullochi Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell broadly subovate, widest in front of middle, anteriorly rounded, as broad as long or nearly so; gently biconvex. Pedicle-valve acuminate; beak pointed, shoulders meeting at about 90°-100° and extending about one-third the length of valve; interior imperfectly known, but pair of small umbonal muscle-scars present near beak, as well as pair of elongate impressed lateral muscle-scars diverging slightly anteriorly and distinctly bounded at sides, apparently divided in front into unequal halves longitudinally, and separated by impressed narrower median area (? visceral cavity) towards front; length and anterior ends of lateral muscles unknown. Brachial valve shorter than pedicle-valve, with inconspicuous beak and obtusely rounded posterior end; interior of valve showing boundaries of splanchnoccel prolonged anteriorly into elongated median tongue nearly reaching front end of valve, divided centrally by thin low longitudinal ridge; pair of oval "central" muscles rather deeply sunk, situated at base of tongue, and pair of stout vascular trunks diverging from base of splanchnocoel and continued forwards concentric to lateral margins. Surface of shell ornamented with fine regular concentric closely placed sublamellose lines of rather unequal strength; interior of shell marked with fine closely placed radial strise and a few pits posteriorly. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||