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Glyptorthis balclatchiensis
Taxonomy
Orthis balclatchiensis was named by Davidson (1883).
It was recombined as Orthis (Hebertella) balclatchiensis by Reed (1917); it was recombined as Glyptorthis balclatchiensis by Williams (1962); it was recombined as Glyptorthis balcletchiensis by Candela and Harper (2014) and Wright and Stigall (2014).
It was recombined as Orthis (Hebertella) balclatchiensis by Reed (1917); it was recombined as Glyptorthis balclatchiensis by Williams (1962); it was recombined as Glyptorthis balcletchiensis by Candela and Harper (2014) and Wright and Stigall (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1883 | Orthis balclatchiensis Davidson p. 176 figs. pl. xiii, figs. 12-14 |
| 1917 | Orthis (Hebertella) balclatchiensis Reed p. 840 figs. pl. vii, figs. 13-20. |
| 1962 | Glyptorthis balclatchiensis Williams pp. 109 - 111 figs. P1. IX, figs. 21-26, 31, 32 |
| 2014 | Glyptorthis balcletchiensis Candela and Harper pp. Supplement 1 |
| 2014 | Glyptorthis balcletchiensis Wright and Stigall p. 894 |
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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.
†Glyptorthis balclatchiensis Davidson 1883
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Subelliptical and unequally biconvex Glyptorthis with the brachial valve less than threequarters as long as wide; incipient dorsal sulcus rarely persisting throughout adult growth and most commonly replaced by a narrow, rounded fold embracing the costellae of sector I with a corresponding median sulcus in the pedicle valve; ornamentation consisting of 14-20 costae with well-developed internal secondary costellae and rare external secondaries and tertiaries, concentric lamellae conspicuous, varying from 2 to 4, but most commonly 3, per millimetre at the 5 mm. growth-stage: ventral muscle-scar subtriangular to cordate, slightly longer than wide and extending antero-medianly for about two-fifths the length of the pedicle valve. |