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One of four spores produced from a tetrasporangium.

tet′ra·spor′ic (-spôr′ĭk, -spŏr′-) adj.


(Biology) any of the asexual spores that are produced in groups of four in the sporangium (tetrasporangium) of any of the red algae
tetrasporic, tetrasporous adj


(ˈtɛ trəˌspɔr, -ˌspoʊr)

any of the four asexual spores produced by meiosis in red algae.
tet`ra•spor′ic (-ˈspɔr ɪk, -ˈspɒr-) tet•ra•spor•ous (ˌtɛ trəˈspɔr əs, -ˈspoʊr-, tɪˈtræs pər-) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tetraspore - one of the four asexual spores produced within a sporangium
spore - a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"
References in periodicals archive ?
Basidia 23-33 x 6.5-7.5 [mu]m, clavate, tetrasporic, rarely mono- or bisporic, hyaline (Fig.
Cultivation of cystocarpic, tetrasporic and vegetative fronds of Chondracanthus chamissoi (Rhodophyta; Gigartinales) on ropes at two localities in northern Chile.
Specimens observed: San Andres Island: Wild Life: Tetrasporic specimen, 4/IV/2013, depth 13 m; Spermatangial and tetrasporic specimens, 09/VIII/2013, depth 14 m; Cystocarpic specimens, 4/IV/2013, depth 13 m.
a) the average ascospore volume in tetrasporic asci: 15,000 um3 instead of 10,000 um3 and 5,000 um3, the last two measured in the single last two Tuber species, respectively; b) the ascospores shape and ornamentation: spherical (22.5-55 um), rarely sub-spherical, enclosed by a reticulate-alveolate exosporium with net meshes delimited by 4-6 walls 5-7.5 um high; c) a peridium constituted by very small and flat warts, almost never transversely striated; d) the odour, at first phenolic (3-methylanisole), then grateful due to the presence of ethyl-methyl-chetone, without any phenolic component; e) thecolour of the gleba, light-brown with numerous, irregularly flexuous and subtle sterile veins; f) theovoid (77-95 x 7-115 um) asci, supported by a hooked pedicle and containing 1-6 spores.
The endozoic association and its diminutive tetrasporic filaments likely represent an advantageous adaptation to low incident light, which is further reduced in quality and quantity by the hydrozoan exosarc cover.
Considering that we found both cystocarpic and tetrasporic thali, we can state that the alga reaches full maturity at this size, and probably does not exceed the size that we observed.