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Mummaspis
Taxonomy
Mummaspis is a genus. It is not extant. Its type is Wanneria occidens.
It was assigned to Olenellinae by Palmer and Repina (1993); to Olenellidae by Whittington et al. (1997); to Laudoniinae by Lieberman (1999); and to Olenellida by Sepkoski (2002).
It was assigned to Olenellinae by Palmer and Repina (1993); to Olenellidae by Whittington et al. (1997); to Laudoniinae by Lieberman (1999); and to Olenellida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Mummaspis Palmer and Repina p. 23 |
| 1997 | Mummaspis Whittington et al. p. 409 |
| 1999 | Mummaspis Lieberman p. 99 |
| 2002 | Mummaspis Sepkoski |
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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. †Mummaspis
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†Mummaspis delgadoae Gapp and Lieberman 2014
†Mummaspis macer Resser and Howell 1938
†Mummaspis muralensis Fritz 1992
†Mummaspis oblisooculatus Frtiz 1992
†Mummaspis occidens Walcott 1913
†Mummaspis truncatooculatus Fritz 1992
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Palmer and L. N. Repina 1993 | Olencilinae with posterior margin of
cephalon nearly straight. Parts of external surface may be reticulate. Intergenal swelling distal to midlength of pos- terior margin. Preglabellar field absent or sagittal length less than that of border. S3 deep, continuous across glabel- la. Occipital spine may be present. Ocular furrow deep; oilier band of ocular lobe narrower than inner band. Third thoracic segment generally only weakly macropleural. | |
| B. S. Lieberman 1999 | Anterior cephalic border between frontal lobe and genal spine angle with length (exsag.) equal to length of L0; anterior border prominently separated from extraocular area by furrow; anterolateral margins of frontal lobe separated from extraocular area by furrow (not anterior border furrow); anterior margins of frontal lobe at each side of midline de- flected posteriorly at roughly 10 degree angle relative to transverse line; prominent parafrontal band not visible in dorsal view; L4 expands dorsally; lateral margins of L4 dis- tal to lateral margins of L0; pre-ocular furrow on frontal lobe directed inward and forward from glabellar margin; transverse profile of ocular lobes convex dorsally; posterolateral tip of ocular lobe directly behind anterolateral tip or rotated slightly laterally; vertical shelf of ocular lobe separated from extraocular area by furrow (except in M. truncatooculatus); S3 jaggedly convex or carat shape, conjoined medially; line between ends of S2 transverse; S2 convex anteriorly; S1 conjoined medially; distal sector of S0 straight; lateral lobes on L0 pre- sent; posterior margin of L0 convex; extraocular area gently flattened or convex; intergenal angle developed posterior of point halfway between ocular lobes and genal spine; extraoc- ular region opposite L1 with width (tr.) equal to roughly 75% of width of glabella at L1; in- tergenal ridge visible as trace; intergenal area with small pointed spine (could not be deter- mined in M. macer); intergenal angle roughly parallels a transverse line; genal spine angle developed opposite medial part of distal margin of L0; T3 macropleural; boundary between thoracic pleural furrow and anterior band sharp; thoracic pleural furrows extend onto spines; length (exsag.) of thoracic pleural furrows (excluding those on T3) at medial part of segment equal to half length (exsag.) of posterior band at similar point; prominent antero- lateral lobes variably present or absent on thoracic axial rings; thoracic pleural spines on segments T5 to T8 extend back approximately four segments; spine on T15 short, length (sag.) of five thoracic segments (could not be determined in M. macer or M. muralensis); and base of spine on T15 nearly as wide (tr.) as axis of segment (could not be determined in M. macer); pleurae present on opisthothorax (could not be determined in M. macer or M. muralensis). |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: Dyeran or 515.30000 to 509.70000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cambrian | Canada (Northern Territories) | M. delgadoae (228646 228647) | |
| Dyeran | Canada (Alberta) | M. oblisooculatus (10883 10884) M. occidens (10876) M. occidens, Olenellus truncatooculatus, M. oblisooculatus, Olenellus muralensis (10867) Olenellus truncatooculatus (10882) |