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Rhabdinopora flabelliformis parabola
Taxonomy
Dictyonema flabelliforme parabolus was named by Bulman (1954).
It was recombined as Rhabdinopora parabola by Erdtmann (1982); it was recombined as Dictyograptus flabelliformis parabolus by Yu (1985); it was recombined as Dictyonema parabola by Bruton et al. (1988); it was recombined as Rhabdinopora flabelliformis parabola by Wang and Servais (2015).
It was recombined as Rhabdinopora parabola by Erdtmann (1982); it was recombined as Dictyograptus flabelliformis parabolus by Yu (1985); it was recombined as Dictyonema parabola by Bruton et al. (1988); it was recombined as Rhabdinopora flabelliformis parabola by Wang and Servais (2015).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1928 | Dictyonema scitulum Harris and Keble p. 93 figs. pl. 9, figs. 14-19 |
| 1950 | Dictyonema cyathiforme Bulman p. 75 figs. pl. 5, figs. 12-14, 21, 22 |
| 1954 | Dictyonema flabelliforme parabolus Bulman pp. 25-27 figs. pl. 1, figs 1-5, text-fig. 9 |
| 1979 | Dictyonema scitulum Cooper and Stewart pp. 774 - 775 figs. Plate 102, figs. 1, 2, 4, 6, 7, 9, 11; text-figs. 3a-c, e,f |
| 1982 | Rhabdinopora parabola Erdtmann figs. pl. 2, figs 1-2 |
| 1985 | Dictyograptus flabelliformis parabolus Yu pp. 21, 22 figs. pl. 3, figs 10, 11. |
| 1988 | Dictyonema parabola Bruton et al. |
| 1998 | Rhabdinopora scitulum Cooper et al. p. 21 |
| 2015 | Rhabdinopora flabelliformis parabola Wang and Servais pp. 73 - 75 figs. Fig. 4 I; Fig. 5 E, G, H; Fig. 6 C, D |
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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.
†Rhabdinopora flabelliformis parabola Bulman 1954
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Invalid names: Rhabdinopora scitulum Harris and Keble 1928 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. A. Cooper and I. R. Stewart 1979 (Dictyonema scitulum) | Rhabdosome siculate, variable in form but generally infundibuliform or
cyathiform ; small (less than 25 mm long) ; nema commonly branched or replaced by a bundle of fibres; stipes about 0-3 mm in lateral width, spaced about 13-14 in 10 mm in the mature part of the rhabdosome; dissepiments slender, spaced irregularly in proximal part of rhabdosome but fairly regularly distally, where they are relatively close (about 15-18 in 10 mm); autothecae markedly denticulate. | |
| W.-H. Wang and T. Servais 2015 | Rhabdosome with a parabolic outline. The divergence angle near the apex is around 90-145°. The rhabdosome length spans from 14 to 71 mm and the width varies from around 14 to 47 mm. The stipe width ranges from 0.35 to 0.6 mm in dorsal and lateral view and they are generally straight to moderate in sinuosity. Interspaces are around twice the stipe width. The stipe spacing ranges from 9 to 12 in 10 mm with a mean value of 10. Dissepiments are horizontal to moderately inclined and close to very closely spaced in the mature part of the rhabdosome. The dissepiments are extremely irregular and rather frequent, they are slender and straight, normally perpendicular to the stipes, and with an average width of 0.1 to 0.2 mm, usually numbering 6-8 in 10 mm (Fig. 5 E). Nematic structures like buoyancy structures are present (Fig. 4 I, Fig. 6 D). |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: Lancefieldian or 484.30000 to 474.90000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ordovician | Norway (Naersnes) | Dictyonema parabola (156953 156954 156956 156957) | |
| Lancefieldian | Australia (Victoria) | Dictyonema scitulum (204417 204420) |