Microworld

world of amoeboid organisms

Menu
Kraken
Cellular features of Kraken carinae. The filopodium might branch (br) or anastomose (an). The origin of the filopodium is usually located under the cell body and branches directly at least once (indicated by arrows). Cells contain one contractile vacuole (cv), one food vacuole with several particles (fv) and one round nucleus (nu) with one roundish nucleolus (no). Granules (g) are often observed but their number differs tremendously. Measure bar indicates 10 µm.

Genus Kraken  Dumack, Schuster, Bass et Bonkowski, 2016

Diagnosis: Very slow moving filose amoeba. Cell body roundish in shape. Usually a single highly branched filopodium originating between the cell body and the substrate through a ring-like structure sometimes visible by light microscopy. The filopodium branches and anastomoses, forming a network. Division longitudinal. Bacterivorous, prey is being transported through the filopodium to the cell body. Cells contain one, rarely two nuclei with one round nucleolus, one contractile vacuole, and usually one food vacuole.

Etymology: krakonan, n [Proto-Germanic] similar words present in several old nordic languages, Kraken refers to the monster Hafgufa (the Kraken) in the norse mythology that catches its prey (ships, men, whales and everything else) with its plentiful arms. Like the Kraken of the legend this species is characterized by a huge network of filopodia preying on bacteria that are then transported to the cell body for digestion.

Type species: Kraken carinae

Kraken carinae  Dumack, Schuster, Bass et Bonkowski, 2016

Diagnosis: Kraken as defined above. Cell body (longest axis) 5.5-11.5 µm.

Type location: Surface soil, agricultural field in northern Germany

Etymology: carina [Latin], noun = ship, nutshell; referring to the prey of the mythical Kraken. Additionally, this species is dedicated to Carina Platten in recognition of her support and encouragement.

Recent posts

Zivkovicia compressoidea

Z. compressoidea, a-b after Chardez, 1958; c after Jung, 1942 Zivkovicia compressoidea  (Jung, 1942) new.comb. Basionym: Pontigulasia compressoidea Jung, 1942 Diagnosis: Shell ovoid and compressed,

Read More »

Zivkovicia flexa

Z. flexa, from Cash and Hopkinson, 1909 Zivkovicia flexa  (Cash and Hopkinson, 1909) Ogden, 1983 Basionym: Pontigulasia compressa var. flexa  Cash and Hopkinson, 1909 Diagnosis:

Read More »

Lagenodifflugia epiouxi

L. epiouxi, after Chardez, 1984 3 Lagenodifflugia epiouxi (Chardez, 1983) new comb. Basionym: Pontigulasia epiouxi Chardez, 1983 Diagnosis: Shell elongate, circular in cross-section or very

Read More »

Centropyxis lapponica

Centropyxis lapponica, after Grospietsch, 1954 Centropyxis lapponica  Grospietsch, 1954 Diagnosis: Shell nearly circular in circumference, without spines. Aperture clear square with rounded corners. Shell viewed

Read More »

Chaos spec. 6

Chaos spec., Crailoo, 2021 Chaos spec. This specimen was found in a samples from Crailoo, Netherlands. It was remarkable because of the absence of crystals.

Read More »

Bullinularia maxima

Bullinularia maxima – from Bobrov and Mazei, 2020 Bullinularia maxima Bobrov et Mazei, 2020 Diagnosis: Shell brown, opaque, elliptical in ventral view; ventral surface is

Read More »

Bullinularia macroporum

Bullinularia macroporum – from Bobrov and Mazei, 2020 Bullinularia macroporum Bobrov et Mazei, 2020 Diagnosis: Shell yellow-brownish, transparent, circular in ventral view; ventral surface is

Read More »

Nebela golemanskyi

N. golemanskyi, after Todorov, 2010 Nebela golemanskyi Todorov, 2010 Diagnosis: Shell large, colourless and pyriform, with a distinct short neck about one fourth of the

Read More »

Nebela nebeloides

N. nebeloides, after Gauthier-Lièvre and Thomas, 1958 Nebela nebeloides (Gauthier-Lièvre and Thomas, 1958) Todorov et al., 2010 Basionym: Difflugia nebeloides Gauthier-Lièvre and Thomas, 1958 Diagnosis:

Read More »