CATALOG OF ORIGINAL DESCRIPTIONS: Alacorys carcinus Haeckel 1887

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: rads_cat -> A -> Alacorys -> Alacorys carcinus
Other pages this level: A. bismarckii, A. carcinus, A. dodecantha, A. enneacantha, A. friderici, A. gigas, A. guilelmi, A. hexacantha, A. hexapleura, A. lutheri, A. octacantha, A. polyacantha

Alacorys carcinus

Citation: Alacorys carcinus Haeckel 1887
Rank: species
Type specimens: pl.74, fig.9
Type repository: No information given
Described on page(s) : p.1375
Family (traditional): Theoperidae
Family (modern): Lophocyrtiidae

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Current identification:

Original Description
Shell rough, with distinct collar stricture. Length of the three joints = 1: 4: 4, breadth = 2: 6: 6. Cephalis hemispherical, with a large, cylindrical, bent spine of three times the length. Thorax inflated, campanulate, with large, regular, circular pores. Abdomen truncate, conical, with three to four transverse rows of regular, square pores, produced by eighteen divergent, straight ribs, which are connected by three to four horizontal rings. Distal end of the ribs prolonged into eighteen slender, conical feet, which are about as long as the thorax and slightly curved inwards.

Length of the three joints, a 20, b 80, c 80µm; breadth, a 50, b 120, c 120µm.

Editors' Notes
Haeckel listed Alacorys carcinus under the subgeneric name Polyacorys, but did not include the subgeneric name in the species name.

Equivalent to Podocyrtis schomburgkii var. Bury RPODY3090] and P. schomburgkii var. Bury [RPODY3130].

Stratigraphic information for LM21 from Riedel, 1959, p.287


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs

Riedel, W. R. (1959). Oligocene and Lower Miocene Radiolaria in tropical Pacific sediments. Micropaleontology. 5(3): 285-302. gs


Alacorys carcinus compiled by the radiolaria@mikrotax project team viewed: 7-3-2021

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