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Hypagnostus brevifrons

Artiopoda - Agnostida - Spinagnostidae

Taxonomy
Agnostus brevifrons was named by Angelin (1851). It is not extant.

It was recombined as Hypagnostus brevifrons by Peng and Robison (2000).

Sister species lacking formal opinion data
H. clipeus, H. durus, H. hippalus, H. inaequalis, H. lens, H. subparallelus

Synonyms
Synonymy list
YearName and author
1851Agnostus brevifrons Angelin
1960Hypagnostus kendectasicus Kryskov
1977Hypagnostus brachydolonus Zhou and Yang
1993Acadagnostus transversus Yang et al.
1993Hypagnostus parabrevifrons Yang et al.
2000Hypagnostus brevifrons Peng and Robison

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaGravenhorst 1843
classArtiopodaHou and Bergstrom
RankNameAuthor
orderAgnostidaSalter 1864
suborderAgnostinaSalter 1864
superfamilyCondylopygoideaRaymond 1913
familySpinagnostidaeHowell 1935
subfamilySpinagnostinaeHowell 1935
genusHypagnostusJaeckel 1909
speciesbrevifrons(Angelin 1851)

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.

†Hypagnostus brevifrons Angelin 1851
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Invalid names: Acadagnostus transversus Yang et al. 1993 [synonym], Hypagnostus brachydolonus Zhou and Yang 1977 [synonym], Hypagnostus kendectasicus Kryskov 1960 [synonym], Hypagnostus parabrevifrons Yang et al. 1993 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Entire body: yesg
Adult length: 1.0 to < 10g
Adult width: 1.0 to < 10g
Spines: noneg
Locomotion: actively mobileg
Life habit: nektonicg
Diet: suspension feederg
Vision: blindf
Created: 2009-02-25 10:15:01
Modified: 2009-09-21 22:37:24
Source: g = genus, f = family
References: Whittington et al. 1997, Hendy 2009

Age range: base of the Zhanaarykian to the top of the Boomerangian or 503.00000 to 499.00000 Ma

Collections (75 total)


Time interval Ma Country or state Original ID and collection number
Middle Cambrian506.5 - 497.0India Hypagnostus brevifrons (114665)
Drumian504.5 - 500.5Sweden Hypagnostus brevifrons (240063)
Marjumian504.5 - 497.0USA (Utah) Hypagnostus brevifrons (230681)
Wangcunian504.5 - 497.0China (Hunan) Hypagnostus brevifrons (49161 49162 49163 49164 49165 49290 49291 128313 128316 128317 128318 128319 128336 128337 128340 128341)
Wangcunian - Guzhangian504.5 - 497.0China (Sichuan) Hypagnostus brevifrons, Acadagnostus transversus (127066) Hypagnostus brevifrons, Hypagnostus parabrevifrons (127067)
Wangcunian - Guzhangian504.5 - 497.0China (Zhejiang) Hypagnostus brevifrons (125541)
Zhanaarykian503.0 - 500.5Kazakhstan Hypagnostus brevifrons (9958 118102)
Boomerangian500.5 - 499.0New Zealand (Nelson) Hypagnostus brevifrons (7897)
Guzhangian500.5 - 497.0Sweden (Jämtland) Hypagnostus brevifrons (240059 240069)
Guzhangian500.5 - 497.0China (Hunan) Hypagnostus brachydolonus (128933) Hypagnostus brachydolonus, Hypagnostus kendectasicus (128932) Hypagnostus brevifrons (49166 49168 49170 49172 49173 49176 49177 49178 49295 126304 126308 126314 126315 126316 126317 126318 126320 126322 126323 126327 126440 126443 128343 128347 128350 128351 128352 128353 128354 128355 128359 128361 128364 128365)
Guzhangian500.5 - 497.0Antarctica Hypagnostus brevifrons (227789)
Ayusokkanian499.5 - 497.0Kazakhstan Hypagnostus brevifrons (9943 9944 9945 9947 9950 118158 118164 118165 118166 118168 118177)