PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Helicosphaera seminulum recta

Taxonomy

Helicosphaera seminulum recta was named by Haq (1966).

It was recombined as Helicopontosphaera recta by Martini (1969); it was recombined as Helicosphaera recta by Jafar and Martini (1975).

Sister species lacking formal opinion data

H. ampliaperta, H. ampliaperta, H. ampliapertura, H. inversa, H. mediterranea, H. prolixa, H. scissura, H. seminutum, H. wallichii, H. waltrans, H. acuta, H. ampliaperta, H. clarissima, H. elongata, H. ethologa, H. inversa, H. kamptneri, H. lophota, H. mediterranea, H. neogranulata, H. omanica, H. pavimentum, H. perch-nielseniae, H. princei, H. scissura, H. vedderi, H. wallichii

Synonymy list

Year	Name and author
1966	Helicosphaera seminulum recta Haq
1969	Helicopontosphaera recta Martini
1975	Helicosphaera recta Jafar and Martini p. 391

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Rank	Name	Author
kingdom	Chromista	Cavalier-Smith 1981
—	Hacrobia
phylum	Haptophyta	Hibberd ex Cavalier-Smith 1986

Rank	Name	Author
genus	Helicosphaera	Kamptner 1954
species	seminulum	Bramlette and Sullivan 1961
subspecies	recta	Haq 1966

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.

†Helicosphaera seminulum recta Haq 1966

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

low Mg calcitep

Environment:

oceanic, oligotrophic, marine, brackishp

Locomotion:

passively mobilep

Life habit:

planktonicp

Depth habitat:

surfacep

Diet:

"photoautotroph"p

Created:

2006-10-31 06:24:05

Modified:

2006-10-31 08:24:05

Source: p = phylum

Reference: Kiessling 2003

Age range: base of the Bartonian to the top of the Pleistocene or 41.03000 to 0.01170 Ma

Collections (148 total)

Time interval	Ma	Country or state	Original ID and collection number
Middle Eocene - Late/Upper Eocene	48.07 - 33.9	North Atlantic	Helicosphaera recta (262297)
Bartonian	41.03 - 37.71	North Atlantic	Helicosphaera recta (261723 261725)
Priabonian - Rupelian	37.71 - 27.3	North Pacific	Helicosphaera recta (243314)
Late/Upper Eocene - Oligocene	37.71 - 23.04	North Atlantic	Helicosphaera recta (262296)
Rupelian	33.9 - 27.3	North Atlantic	Helicosphaera recta (261716 262369 262370 262371 262372 262373 262374 262375 262377 262378 262379 262380 263790 263791 266443 267044 268049 268051 268053 268059 268060 268061)
Rupelian	33.9 - 27.3	North Pacific	Helicosphaera recta (242553 242946 245887 245888)
Oligocene	33.9 - 23.04	North Pacific	Helicosphaera recta (255869)
Oligocene	33.9 - 23.04	North Atlantic	Helicosphaera recta (260557 261079 261080 261081 261082 261083 261084 261085 261086 261087 261088 261089)
Oligocene	33.9 - 23.04	South Pacific	Helicosphaera recta (249142 249143 249144 249145 249146 249147 249150 249151 249152 249153)
Rupelian - Chattian	33.9 - 23.04	North Atlantic	Helicosphaera recta (262364 262365 262366 262367 262368 262859 262862 262866)
Rupelian - Chattian	33.9 - 23.04	North Pacific	Helicosphaera recta (242941 242945 243307 243308)
Oligocene - Early/Lower Miocene	33.9 - 15.98	North Atlantic	Helicosphaera recta (261076 261077 261078)
Oligocene - Miocene	33.9 - 5.333	South Pacific	Helicosphaera recta (249138)
Chattian	27.3 - 23.04	Indian Ocean	Helicosphaera recta (256638 256639 256640 256641 256651 256653 256654 256655 256657 256659)
Chattian	27.3 - 23.04	North Pacific	Helicosphaera recta (242985 242986 242996)
Chattian	27.3 - 23.04	North Atlantic	Helicosphaera recta (267437 267438 267439 267442 267443 267446 268048 268495 268499)
Chattian	27.3 - 23.04	South Pacific	Helicosphaera recta (258024 258027 258030 258031)
Late/Upper Oligocene	27.3 - 23.04	South Pacific	Helicosphaera recta (251661 251663 251667)
Chattian - Aquitanian	27.3 - 20.45	North Atlantic	Helicosphaera recta (262852 262853 262854)
Chattian - Aquitanian	27.3 - 20.45	Indian Ocean	Helicosphaera recta (256637)
Chattian - Aquitanian	27.3 - 20.45	North Pacific	Helicosphaera recta (242747 242828)
NN1	23.2 - 22.75	Indian Ocean	Helicosphaera recta (248841)
NN1	23.2 - 22.75	North Atlantic	Helicosphaera recta (266747)
Aquitanian	23.04 - 20.45	Indian Ocean	Helicosphaera recta (255691 255697 255704 255710)
Aquitanian	23.04 - 20.45	North Pacific	Helicosphaera recta (242738 242740 242741 242743 242744 243590 243592 243593)
Aquitanian	23.04 - 20.45	North Atlantic	Helicosphaera recta (268487)
Early/Lower Miocene	23.04 - 15.98	South Pacific	Helicosphaera recta (251648)
Miocene	23.04 - 5.333	Indian Ocean	Helicosphaera recta (252497 252504 255594 255595)
NN2	22.75 - 19.2	Indian Ocean	Helicosphaera recta (248838 248839)
Burdigalian	20.45 - 15.98	North Atlantic	Helicosphaera recta (262843 262846)
Burdigalian	20.45 - 15.98	Indian Ocean	Helicosphaera recta (255677 255678 255679 255681 255682 255683 255684 255685 255686 255687 255688 255689 255690)
Langhian - Serravallian	15.98 - 11.63	North Pacific	Helicosphaera recta (243572)
Pliocene	5.333 - 2.58	North Atlantic	Helicosphaera recta (261071 261072 261073)
Pleistocene	2.58 - 0.0117	South Pacific	Helicosphaera recta (249129)
Pleistocene	2.58 - 0.0117	North Atlantic	Helicosphaera recta (266442)