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Naropa vi

Protozoa - Nassellaria - Ultranaporidae

Discussion

Named by Hori, Whalen & Dumitrica.

Original description: Test conical, dicyrtid. Cephalis small, with polygonal pore frames. Apical and ventral horns long, cylindrical and fused at the base; horns disposed in a V shape. Thorax conical with hexagonal pore frames arranged in staggered horizontal rows and, in some specimens, with a circumferential ridge at middle part. Distal opening of thorax triangular, surrounded by a wide imperforate rim. Feet straight, divergent, triradiate, pointed distally. Two outer blades of each foot interconnected with the corresponding blade of neighbouring feet at the base of the perforate part of the thorax.

Original remarks: This species is rare but morphologically distinctive. It differs from typical Napora in having both apical and ventral horns circular in cross-section. Moreover, the tribladed feet display two outer blades with a wide groove in between.

Etymology: From the two cephalic horns that outline the V letter; noun.

Taxonomy
Naropa vi was named by Gorican et al. (2006). It is a 3D body fossil. Its type locality is BPW80-14, San Hipolito Fm, Vizcaino Peninsula, Baja California Sur, which is in a Pliensbachian slope sandstone/lime mudstone in the San Hipolito Formation of Mexico.

Synonymy list
YearName and author
2006Naropa vi Gorican et al. p. 256 figs. Pl. UTD01
2006Naropa vi Hori et al. p. 256 figs. Pl. UTD01

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

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.

Naropa vi 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 Pliensbachian to the top of the Late/Upper Toarcian or 192.90000 to 174.70000 Ma

Collections (13 total)


Time interval Ma Country or state Original ID and collection number
Hettangian - Pliensbachian201.4 - 184.2Japan Dumitricaella sp. A (120066 120067) Naropa vi (120065)
Sinemurian - Pliensbachian199.5 - 184.2Japan Dumitricaella sp. A (120256 120257 120259 120260 120261) Naropa vi (120002 120258)
Pliensbachian192.9 - 184.2Mexico (Baja California Sur) Naropa vi (type locality: 33559) Ultranaporida indet. (33567)
Middle Toarcian - Late/Upper Toarcian182.9 - 174.7Japan Dumitricaella sp. A (120072)