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Bipedis yaoi

Protozoa - Nassellaria - Ultranaporidae

Discussion

Named by R. S. Hori.

Original description: Cephalis small and spherical with a long horn; horn triradiate or solid circular in axial section. Thorax large and spherical with fairly regularly arranged polygonal pore frames, a circular aperture and two long feet. Feet asymmetrical, straight or sometimes curving outward distally. Feet thin, blade-like in axial section proximally terminating with a solid spine.

Original remarks: This species is distinguished from all other species of Bipedis by having a large almost spherical thorax. It is similar to Bipedis hannai Whalen and Carter 1998, but differs by having longer feet, a longer stout horn and larger shell. B. yaoi Hori n. sp. differs from Bipedis japonicus Hori n. sp. and B. horiae Sugiyama 1997 by having thin feet that are circular in cross section terminally, and a small circular aperture.

Etymology: This species is named in honor of Akira Yao for his pioneering works on Lower Jurassic radiolarian fossils.

Taxonomy
Bipedis yaoi was named by Gorican et al. (2006). Its type specimen is IYII24-28 (pl.BPD16, fig. 1) and is a 3D body fossil. Its type locality is Iwayakannon (IY) Section, Inuyama, IYII24, which is in a Sinemurian/Pliensbachian marine chert/mudstone in Japan.

Synonymy list
YearName and author
2006Bipedis yaoi Gorican et al. p. 70 figs. pl. BPD16

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RankNameAuthor
—Life
—Eukaryota()
classProtozoaGoldfuss 1820
subphylumSarcodinaSchmarda 1871
classReticulareaLankester 1885
subclassRadiolaria(Müller 1858)
RankNameAuthor
superorderPolycystina(Ehrenberg 1838)
orderNassellariaEhrenberg 1875
familyUltranaporidaePessagno 1977
genusBipedis
speciesyaoi

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.

†Bipedis yaoi Gorican et al. 2006
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: silicap
Environment: marinep
Locomotion: passively mobilep
Life habit: planktonicp
Diet: omnivorep
Created: 2005-01-28 01:13:47
Modified: 2005-01-28 03:13:47
Source: p = phylum
Reference: Kiessling 1999

Age range: base of the Late/Upper Triassic to the top of the Pliensbachian or 237.00000 to 184.20000 Ma

Collections (19 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Triassic237.0 - 201.4Japan Bipedis sp. B (120056 120058) Bipedis yaoi (120054)
Early/Lower Hettangian201.4 - 199.5Japan Bipedis yaoi (54234)
Hettangian - Pliensbachian201.4 - 184.2Japan Bipedis sp. B (120190) Bipedis yaoi (120180 120189)
Early/Lower Jurassic201.4 - 174.7Japan Bipedis yaoi (120133 120134 120135 120136 120137 120138 120139 120140)
Sinemurian - Pliensbachian199.5 - 184.2Japan Bipedis sp. B (119997 type locality: 119998 119999 120003)