Microworld

world of amoeboid organisms

Menu
Squamamoeba japonica – from Kudryavtsev and Pawlowski (2013)

Evosea Kang et al. 2017

Representatives of this clade can vary across almost the entire range of morphologies seen in Amoebozoa. Many members have complex life cycles that include amoeboid, ciliated and fruiting stages. Some species appear to be exclusively ciliated with no amoeboid features. Most taxa with only a subset of these life cycle stages.

The name Evosa was proposed by Kang et al. (2017) for a clade that contains the well-supported sub-clades Cutosea, Archamoebae, Eumycetozoa, and Variosea. They demonstrated that Cutosea belongs within this group and not within Lobosa. Evosea corresponds, more or less, with the traditional Conosa plus the Cutosea. Conosa is morphologically defined as having taxa with flagella, while Cutosea is devoid of flagellated taxa. Cutosea is represented by Sapocribrum, Squamamoeba, amoebae covered with very small scales.

The group that contains myxogastrids, dictyostelids, and protosporangiids is renamed Eumycetozoa.

In protosteloid evoseans, sex is sometimes thought to be associated with life cycles that include amoeboflagellates that germinate from spores and precede the development of nonflagellate obligate amoebae that subsequently produce the sporocarps

Reference:

Kang, S., Tice, A.K., Spiegel, F.W., Silberman, J.D., Pánek, T., Čepička, I., Kostka, M., Kosakyan, A., Alcântara, D.M., Roger, A.J., Shadwick, L.L., Smirnov, A., Kudryavstev, A., Lahr, D.J.G.,Brown, M.W. 2017. Between a pod and a hard test: the deep evolution of amoebae. Molecular Biology and Evolution. 34: 2258-2270.

Recent posts

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauß Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex

Velamentofex tyrolensis (photomicrograph Steffen Clauß) Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad

Read More »

Claparedellus lachmannii

Claparedellus lachmannii, common shape (Riedensee) Claparedellus lachmannii  Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a

Read More »

Claparedellus

Claparedellus lachmannii Genus Claparedellus Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a hyaline, flexible,

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauß) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauß) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »