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Liolalax
Taxonomy
Liolalax was named by Holloway and Lane (1999). It is not extant.
It was assigned to Styginidae by Holloway and Lane (1999).
It was assigned to Styginidae by Holloway and Lane (1999).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Lalax Holloway and Lane pp. 877 - 878 |
| 1999 | Liolalax Holloway and Lane |
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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.
G. †Liolalax Holloway and Lane 1999
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Invalid names: Lalax Holloway and Lane 1998 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. J. Holloway and P. D. Lane 1998 (Lalax) | Cephalon strongly convex (sag.), curvature in sagittal plane subtending more than 90°, height in lateral profile greater than or equal to sagittal length. Omphalus and anterolateral internal pit present. Axial furrow diverging moderately behind and immediately in front of lunette, dying out anteriorly behind omphalus. Eye large, situated less than its own length from posterior cephalic margin; socle not strongly convex (tr.). Posterior branch of facial suture strongly diverging backwards; anterior branch diverging moderately forwards. Genal angle broadly rounded. Rostral plate sub-triangular, gently convex (sag., exsag.) over anterior 70 per cent. and gently concave in posterior part, without upturned posterior flange; connective suture meeting hypostomal suture close to sagittal line; vincular furrow present across posterior edge of doublure. Thorax with very wide, gently arched axis comprising 60--70 per cent. segmental width (tr.); axial furrow weak; fulcrum situated very close to axial furrow; pleurae abaxial to fulcrum almost continuous in slope with lateral part of axial rings. Pygidium moderately convex (sag., exsag.), lenticular in dorsal view, maximum width just in front of midlength; anteriorrnost pleural furrow and holcos very weak or not defined. Terrace ridges present over most of dorsal surface of cephalon and pygidium. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy et al. 2009, Whittington et al. 1997, Aberhan et al. 2004 | |||||
Age range: base of the Sheinwoodian to the top of the Gorstian or 433.40000 to 425.60000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sheinwoodian | Czech Republic | L. bouchardi (14124) | |
| Wenlock | USA (Arkansas) | L. clairensis, L. sp. A (229058) | |
| Gorstian | Ukraine (Podolia) | Illaenus bouchardi (155618) |