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Parastrophina balcletchiensis

Rhynchonellata - Pentamerida - Parastrophinidae

Taxonomy
Rhynchonella balclatchiensis was named by Davidson (1883).

It was recombined as Camerella balclatchiensis by Reed (1917); it was recombined as Parastrophina balclatchiensis by Williams (1962); it was recombined as Parastrophina balcletchiensis by Candela and Harper (2014).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1883Rhynchonella balclatchiensis Davidson p. 160 figs. pl. x, fig. 15, non fig. 16 nec pl. xi, fig. 23
1917Camerella balclatchiensis Reed pp. 923 - 924 figs. pl. xxii, figs. 12-15
1962Parastrophina balclatchiensis Williams pp. 226 - 227 figs. P1. XXIII, figs. 21, 22, 25, 28-30; Fig. 11
2014Parastrophina balcletchiensis Candela and Harper pp. Supplement 1

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderPentameridaSchuchert and Cooper 1931
suborderSyntrophiidinaUlrich and Cooper 1936
superfamilyCamerelloideaHall and Clarke 1894
familyParastrophinidaeUlrich and Cooper 1938
genusParastrophina
speciesbalcletchiensis(Davidson 1883)

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.

Diagnosis
ReferenceDiagnosis
F. R. C. Reed 1917Shell subtriangular to subpentagonal, broadest anteriorly, rounded at sides, usually as wide as long or rather wider than long, biconvex. Pedicle-valve with median sinus commencing at from one-third to one-half the length of the valve, increasing rapidly in width to anterior margin to more than one-third the anterior width of shell, shallow, rounded, with floor more or less produced into tongue ; lateral
margins of sinus angular, more or less strongly elevated on front margin; floor of
sinus with single narrow median rib of variable length and sometimes nearly
obsolete ; lateral portions of valve gently convex, with traces of one or more angular
short marginal plications, often obsolete, forming zigzag junctions of margin; beak
small, acute, elevated, very slightly incuryed, higher than that of opposite valve ;
triangular delthyrium below beak. Brachial valve usually more convex than pedicle-valve, with a more or less developed fold towards anterior margin composed of a pair of rather closely placed small angular or subangular plications of variable length, becoming highest on anterior margin; lateral portions of valve more or less convex and .dependent, occasionally with weak marginal plications; beak obtuse, low, small. Surface of valves smooth.
A. Williams 1962Unequally biconvex, subpentagonal Parastrophina with rounded lateral sides and anterior margin, pedicle valve slightly wider than long, shell over two-thirds as deep as wide with a more convex brachial valve inflated posteriorly and elevated anteriorly along a fold originating between 3 and 5 mm. anterior to the umbo and consisting of a pair of subangular costae complementary to a median costa in a deep ventral sulcus that is over two-thirds as wide as the maximum width of the shell; dorsal flanks steeply convex, bearing 2 or 3 pairs of short subangular costae; spondylium duplex, supported by a median septum almost one-half as long as the pedicle valve, cruralial septum extending anteriorly for about onethird the length of the brachial valve.