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Baltograptus deflexus
Taxonomy
Didymograptus deflexus was named by Elles and Wood (1901).
It was recombined as Corymbograptus deflexus by Strachan (1981); it was recombined as Didymograptus (Corymbograptus) deflexus by Toro (1994); it was recombined as Baltograptus deflexus by Toro and Maletz (2008), Rushton (2011) and Lo Valvo et al. (2020).
It was recombined as Corymbograptus deflexus by Strachan (1981); it was recombined as Didymograptus (Corymbograptus) deflexus by Toro (1994); it was recombined as Baltograptus deflexus by Toro and Maletz (2008), Rushton (2011) and Lo Valvo et al. (2020).
Synonymy list
| Year | Name and author |
|---|---|
| 1901 | Didymograptus deflexus Elles and Wood |
| 1908 | Didymograptus deflexus Elles and Wood |
| 1981 | Corymbograptus deflexus Strachan p. 20 |
| 1994 | Didymograptus (Corymbograptus) deflexus Toro figs. pl. 2 f. 5, 9, 14 |
| 2008 | Baltograptus deflexus Toro and Maletz |
| 2011 | Baltograptus deflexus Rushton pp. 322 - 323 figs. 2A, B, C?, D–L; 3 |
| 2020 | Baltograptus deflexus Lo Valvo et al. p. 539 fig. 3.4 |
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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.
†Baltograptus deflexus Elles and Wood 1901
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. W. A. Rushton 2011 | Slender deflexed Baltograptus with artus-type development. Sicula 1.4–1.6 mm long, about 0.3 mm wide at the aperture, supradorsal part 0.7–1.0 mm long, free ventrally for 0.25–0.5 mm. Th 11 originates about 0.5 mm below the tip of the sicula and is the dicalycal theca, indicating artus-type development. All specimens appear to be right-handed, except Fig. 2C, the identification of which is accordingly doubtful. Stipe 1 at its origin is about 0.3 mm in diameter. The stipe at the aperture of th11 is about 0.6 mm wide and the stipes widen only gradually; they are less than 1 mm wide at th 4 or 5, where the stipes make the outward bend; they seldom exceed 1·0 mm in width distally. Thecal spacing distal of the outward bend is about 13 per 10 mm (2TRD around 1.6). The thecal inclination is up to about 30º. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: base of the Moridunian to the top of the Caradoc or 477.70000 to 449.50000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Ordovician | Argentina (Jujuy) | Baltograptus deflexus (220274 220277) | |
| Arenig | Argentina | Didymograptus deflexus (8777 9009 9012 9022) | |
| Moridunian | Bolivia | Baltograptus deflexus (90413) | |
| Floian | Russian Federation (Siberia) | Corymbograptus deflexus (205382) | |
| Yapeenian | New Zealand | Didymograptus deflexus (63326 63327 63331 63370) | |
| Castlemainian | New Zealand | Didymograptus deflexus (63284) | |
| Dapingian | Russian Federation (Siberia) | Corymbograptus deflexus (205387 205563) | |
| Darriwilian | Russian Federation (Siberia) | Corymbograptus deflexus (205561) | |
| Caradoc | Canada (British Columbia) | Didymograptus deflexus (25170) |