Varol Research | Anfractus harrisonii

Set number: 2675

$Anfractus harrisonii 2166$ 1
$Anfractus harrisonii 2165$ 2
$Anfractus harrisonii 2163$ 3
$Anfractus harrisonii 2164$ 4

10µm

Anfractus harrisonii, Late Valanginian, Yemen, Arabian Peninsula

Set number: 2674

$Anfractus harrisonii 2162$ 1
$Anfractus harrisonii 2159$ 2
$Anfractus harrisonii 2161$ 3
$Anfractus harrisonii 2160$ 4

10µm

Anfractus harrisonii, Late Valanginian, Yemen, Arabian Peninsula

Set number: 2673

$Anfractus harrisonii 2093$ 1
$Anfractus harrisoniii 2092$ 2
$Anfractus harrisonii 2090$ 3
$Anfractus harrisonii 2091$ 4

10µm

Anfractus harrisonii, Late Valanginian, Yemen, Arabian Peninsula

Set number: 2672

$Anfractus harrisonii 2081$ 1
$Anfractus harrisonii 2080$ 2
$Anfractus harrisonii 2078$ 3
$Anfractus harrisonii 2079$ 4

10µm

Anfractus harrisonii, Late Valanginian, Yemen, Arabian Peninsula

Set number: 2671

$Anfractus harrisonii 1618$ 1
$Anfractus harrisonii 1619$ 2
$Anfractus harrisonii 1616$ 3
$Anfractus harrisonii 1617$ 4

10µm

Anfractus harrisonii, Early Kimmeridgian, Eastern Gulf of Mexico

Set number: 2670

$Anfractus harrisonii 1585$ 1
$Anfractus harrisonii 1586$ 2
$Anfractus harrisonii 1583$ 3
$Anfractus harrisonii 1584$ 4

10µm

Anfractus harrisonii, Early Tithonian, Eastern Gulf of Mexico

Final Epithet

Anfractus harrisonii Medd, 1979

Basionym

Anfractus harrisonii Medd, 1979

Synonyms

Anfractus variabilis Medd, 1979

Anfractus youngii Bown, 1993

Anfractus parvus Bown 1993

Remarks

Small holococcolith with a distal process composed of hexagonal prisms, exhibiting parallel extinction in plan view under cross-polarised light.

References

Bown, P. R. 1993. New holococcoliths from the Toarcian-Aalenian (Jurassic) of northern Germany. Senckenbergiana lethaea, 73: 407-419.

Medd, A.W. 1979. The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109.

Taxonomy

Anfractus

Anfractus harrisonii

Biostratigraphy

Stratigraphic Range

Early Toarcian - Late Valanginian

Age (Ma)

184.20? - 132.60?

Holotype

Anfractus harrisonii Medd, 1979

Oxfordian

Gamlingay Borehole, Cambridgeshire, England.