athecate

athecate

[′ath·ə‚kāt]
(invertebrate zoology)
Lacking a theca.
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References in periodicals archive ?
Briggs EA (1931) Notes on Australian athecate hydroids.
Schuchert P (2006) The European athecate hydroids and their medusae (Hydrozoa: Cnidaria) Capitata Part 1.
The marine fauna of New Zealand: athecate hydroids and their medusae (Cnidaria: Hydrozoa).
Athecate hydroids from Puerto Rico and the Virgin Islands.
A new species of athecate hydroid Cordylophora from Japan.
Remarks: The large population of athecate specimens collected in QEP indicates parthenogenetic reproduction.
0 0 40 20 Dictyocha speculum 0 0 0 0 Dinophyceae 2039 5038 8677 8937 Ceratium extensum 0 0 0 0 Ceratium furca 40 40 0 40 Ceratium fusus 40 40 80 20 Ceratium tripos 0 0 0 0 Athecate dinoflagellates 100 280 200 380 (> 15 [micro]m) Athecate dinoflagellates 1839 4598 8277 8277 (< 15 [micro]m) Thecate dinoflagellates 0 0 0 20 Dinophysis sp.
In the athecate colonial hydroid Hydractinia symbiolongicarpus, allorecognition is controlled by a single chromosomal interval and fusion is expected only between closely related individuals (2).
verrucosa consumes numerous athecate hydroid species, scyphistomae, and tunicates (Kuzirian, 1979).