exospore


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exospore

[′ek·sō‚spȯr]
(mycology)
An asexual spore formed by abstriction, as in certain Phycomycetes.
References in periodicals archive ?
Spores monolete, ellipsoidal, light brown, (29) 34 (44) x (21) 25 (30) [micro]m; sporoderm 4 [micro]m thick, perispore rugulate, 2 [micro]m thick, with a compact external layer, an alveolar intermediate layer, and a micro-granular internal layer strongly adhered to exospore in young spores, easily detaching in the adult ones; exospore psilate; laesura (12) 16 (18) [micro]m, slightly protruding.
fused to a thin, flat exospore, and an endospore adjacent to the
of the following layers: perispore, para-exospore, exospore, and
Eleven character states change on the branch subtending Biscalitheca + Corynepteris: #5, growth form of stem/axis erect [right arrow] rhizomatous; #7, arborescence present [right arrow] absent; #24, scales absent [right arrow] present; #35, protoxylem of stem/axis mesarch [right arrow] exarch; #41, radial rachis/axis trace round-elliptical [right arrow] absent; #57, meio/microsporangium bearing structure unlike vegetative [right arrow] somewhat modified from the vegetative; #61, abaxially attached sporangia absent [right arrow] present; #65, meio/microsporangial grouping absent [right arrow] present; #71, sporangial stalk absent [right arrow] broad; #74, functional annulus absent [right arrow] present; and #88, exospore surface nearly smooth or plain [right arrow] obviously sculptured.
Exospore surface: 0 = nearly smooth or plain; 1 = obviously sculptured.
68 of length 9: Aserinsky (family name, OED), ater-miner, afternoons, aucthores, avengings, axenfelds (eye problem), brimmings, bucklings, bydweller, Cogglesby (proper noun, OED savage), crepillit, cwelleras, Dominguez (personal name), drillings, drinkings, duellings, duffields (type of cloth, OED half-thick), dweller by, dwellings, dwillings, exospores (OSPD), frillings, fumositez (c 1400 q, OED original), grillings, grimoires, grip-knobs, Posht-e Waz (Afghanistan) 8 of length 10: ascriptive, aucthorite, aucthorize, by-drinking, Emi Klingue (Libya)
Whittenbury R, Davies SL, Davey JF (1970) Exospores and cysts formed by methane utilising bacteria.