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Taxonomy
Asaphiscus was named by Meek (1873) [Sepkoski's age data: Cm uMid-l Sepkoski's reference number: 379]. It is not extant. Its type is Asaphiscus wheeleri.
It was assigned to Ogygiocarinae by Walcott (1916); to Ptychoparioidea by Palmer (1954); to Ptychopariida by Sepkoski (2002); and to Asaphiscidae by Jell and Adrain (2002).
It was assigned to Ogygiocarinae by Walcott (1916); to Ptychoparioidea by Palmer (1954); to Ptychopariida by Sepkoski (2002); and to Asaphiscidae by Jell and Adrain (2002).
Species
A. (Blainia), A. agatho, A. anaxis, A. calanus, A. duris, A. florus, A. glaber, A. iddingsi, A. laeviceps, A. minor, A. wheeleri (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1873 | Asaphiscus Meek |
| 1916 | Asaphiscus Walcott p. 381 |
| 1954 | Asaphiscus Palmer p. 72 |
| 2002 | Asaphiscus Jell and Adrain p. 344 |
| 2002 | Asaphiscus 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. †Asaphiscus Meek 1873
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Subg. †Asaphiscus (Blainia) Walcott 1916
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†Asaphiscus (Blainia) glabra Walcott 1916
†Asaphiscus (Blainia) gregarius Walcott 1916
†Asaphiscus (Blainia) paula Walcott 1916
†Blainia buttsi Rasetti 1965
†Blainia centerensis Resser 1935
†Asaphiscus agatho Walcott 1916
†Asaphiscus anaxis Walcott 1916
†Asaphiscus calanus Walcott 1916
†Asaphiscus duris Walcott 1916
†Asaphiscus florus Walcott 1916
†Asaphiscus glaber Walcott 1916
†Asaphiscus iddingsi Walcott 1911
†Asaphiscus laeviceps Walcott 1884
†Asaphiscus minor Walcott 1916
†Asaphiscus wheeleri Meek 1873
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Palmer 1954 | Cephalon subsemicircular in outline, posterior margin nearly straight, genal angles rounded. Cranidium with glabella tapered forward, strongly rounded anteriorly, poorly defined by shallow dorsal furrow. Glabellar furrows not visible. Occipital fur- row shallow. Occipital ring gently rounded. Frontal area with deep, curved marginal furrow. Border gently arched upward, width constant. Fixed cheeks down-sloping from glabella; palpebral lobes not defined by palpebral furrow, situated opposite middle third of glabella. Length of posterior limbs about equal to width of glabella at occipital furrow; marginal furrow broad, shallow. Facial sutures divergent anterior and posterior to palpebral lobes. Anterior course extended onto border and then turned abruptly inward to cut anterior margin intermediate between anterolateral corners of cranidium and longitudinal axis. Posterior course extended backward and outward in even curve to cut margin within genal angle.
Free cheek with evenly rounded lateral margin. Marginal furrow moderately deep, parallels margin. Genal angle rounded. Thorax consists of nine segments. Axial lobe prominent, narrower than pleural lobes. Pleural lobes of each segment subequally divided by deep pleural furrows near axial lobe, flattened and rounded distally. Pygidium about as large as cephalon, subsemicircular in outline, width less than twice length. Axial lobe prominent, tapered posteriorly, extended to or onto border. Border of nearly constant width, narrower than widest portion of pleural platform. Axial and pleural furrows shallow. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009, Hendy 2009 | |||||
Collections (33 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cambrian | USA (Georgia) | A. sp., Blania gregaria, Eteraspis glabra (164675) | |
| Cambrian | Argentina (San Juan ) | Blainia gregaria (200101) | |
| Ordian | Australia (Northern Territory) | A. sp. (203) | |
| Delamaran | USA (Utah) | A. wheeleri (77219) | |
| Solvan - Menevian | USA (Pennsylvania) | A. glaber (8593 8594 8595 8596) A. glaber, Blainia buttsi (8597) Blainia buttsi (8599) | |
| St Davids | USA (Utah) | A. sp. (216) | |
| St Davids | USA (Idaho/ Utah) | A. sp. (218) | |
| Drumian | USA (Utah) | A. wheeleri (230679) | |
| Menevian | Canada (Yukon) | Cedaria minor (9874) | |
| Menevian | USA (Utah) | Cedaria minor (230681) | |
| Drumian - Marjumian | Mexico | A. sp. (236876) | |
| Marjumian | Canada (Newfoundland) | Blainia sp. (196378) | |
| Marjumian | USA (Georgia) | A. gregarius (8391 8393 8396 8397 8584) A. sp., Blainia sp. (64484) Blainia sp. (64486) | |
| Marjumian | USA (Utah) | A. wheeleri (56144 230682) | |
| Steptoean | USA (Virginia) | Coosia calanus (6960) | |
| Dresbachian | Canada (Yukon) | Cedaria minor (55211 55213 55215 55216 55220) | |
| Dresbachian | USA (Utah) | Cedaria minor (50592) |