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Asaphiscus

Trilobita - Asaphida - Asaphidae

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 Asaphiscidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).

Synonymy list
YearName and author
1873Asaphiscus Meek
1916Asaphiscus Walcott p. 381
1954Asaphiscus Palmer p. 72
2002Asaphiscus Jell and Adrain p. 344
2002Asaphiscus Sepkoski

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
RankNameAuthor
classTrilobitaWalch 1771
subclassLibristoma
orderAsaphidaSalter 1864
superfamilyAsaphoideaSalter 1864
familyAsaphidaeBurmeister 1843
subfamilyOgygiocarinaeRaymond 1913
genusAsaphiscusMeek 1873

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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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
ReferenceDiagnosis
A. R. Palmer 1954Cephalon 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.