Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Hsuum lucidum

Protozoa - Nassellaria - Hsuidae

Discussion

Original description: Test conical, lobate, pointed apically, usually with six to seven post-abdominal chambers. Cephail small, conical, without rudimentary horn. Cephalis and thorax covered with layer of microgranular silica. Abdomen and post-abdominal chambers rapidly increasing in width, gradually increasing in length as added. Post-abdominal chambers with inner layer of massive tetragonal pore frames with small circular pores: outer layer of mesh work with short, moderately massive costae. Costae mostly occurring on joints of chambers.

Original remarks: Hsuum() lucidum n. sp differs from H. parasolensi Pessagno and Whalen by lacking a horn on cephalis, and by having a more conical test with less massive costae.

Etymology: Lucidus-a-um (Latin, adj.) bright.

Taxonomy
Hsuum lucidum was named by Yeh (1987). Its type specimen is NMNS (000085) and is a 3D body fossil. Its type locality is Suplee-Izee area, OR-600A, which is in a Toarcian marine tuff/limestone in the Hyde Formation of Oregon.

It was recombined as Transhsuum lucidum by Gorican et al. (2003).

Synonyms
Synonymy list
YearName and author
1987Hsuum lucidum Yeh
1987Hsuum validum Yeh p. 66 figs. Pl. 3, fig. 26; Pl. 5, figs. 17, 22; Pl. 17, fig. 12, pl. 28, fig. 1
2003Transhsuum lucidum Gorican et al.
2004Hsuum lucidum Matsuoka

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
—Life
—Eukaryota()
classProtozoaGoldfuss 1820
subphylumSarcodinaSchmarda 1871
classReticulareaLankester 1885
subclassRadiolaria(Müller 1858)
RankNameAuthor
superorderPolycystina(Ehrenberg 1838)
orderNassellariaEhrenberg 1875
superfamilyArchaeodictyomitraceaPessagno 1976
familyHsuidae
genusHsuumPessagno 1977
specieslucidum

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.

†Hsuum lucidum Yeh 1987
show all | hide all
Invalid names: Hsuum validum Yeh 1987 [objective synonym]
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 Pliensbachian to the top of the Early/Lower Aalenian or 192.90000 to 170.90000 Ma

Collections (26 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Pliensbachian192.9 - 184.2Canada (British Columbia) Hsuum lucidum (119713 119715 119716 119769 119770 119771 119773 119774 119800 119808)
Late/Upper Pliensbachian192.9 - 184.2Canada (British Columbia) Hsuum lucidum (119711 119776)
Late/Upper Pliensbachian192.9 - 184.2USA (Oregon) Hsuum validum (124323 124324 124326)
Early/Lower Toarcian184.2 - 182.9USA (Oregon) Hsuum lucidum (124329) Hsuum lucidum, Hsuum validum (type locality: 124328 124331)
Early/Lower Toarcian184.2 - 182.9Slovenia Transhsuum lucidum (67146 67150 67151 67152 67154)
Early/Lower Toarcian184.2 - 182.9Japan Hsuum lucidum (124830)
Middle Toarcian - Early/Lower Aalenian182.9 - 170.9Greece Transhsuum lucidum (142133)
Early/Lower Aalenian174.7 - 170.9Canada (British Columbia) Hsuum lucidum (119855)