| 释义 |
inoperculate, a.|ɪnəʊˈpɜːkjʊlət|
[in-3.]
Not having an operculum or lid.
1. Conch. Of or belonging to the Inoperculata, a division of Pulmonifera containing those univalves, such as snails, whose shell has no operculum.
1835–6Todd Cycl. Anat. I. 114/1 The surface of the body..covered with a shell..always inoperculate. 1854Woodward Mollusca ii. 159 One large division of the land-snails is furnished with an operculated shell; the rest are inoperculate, and sometimes shell-less.
2. Bot. Of an ascus or sporangium: lacking an operculum and therefore opening by splitting. Also as n., a fungus having this characteristic.
1879W. Phillips tr. E. Boudier in Trans. Woolhope Naturalists' Field Club (1887) 202 The second [section of the family] I would call Inoperculate Discomycetes, or simply Inoperculæ, because the exit of the sporidia takes place by a small hole, formed at the extreme summit of the asci, with its margin more or less elevated, but without any appearance of an operculum. 1913Trans. Brit. Mycol. Soc. IV. 402 In the inoperculate species, the spores have a tendency to septation. 1929Trans. Brit. Mycol. Soc. XIV. 267 The epithecium, overlying the hymenium..occurs in several inoperculate genera. 1943Mycologia XXIV. 585 The outstanding characters of this Panamanian discomycete are unlike those of any of the stromatic inoperculates. 1950E. A. Bessey Morphol. & Taxon. Fungi iii. 45 In this order [sc. Chytridiales] the zoospores or motile gametes escape through an exit papilla or tube whose apex softens and permits the motile cells to push out (the inoperculate series), or they escape through a sort of cap that opens like a trap door, the so-called operculum (the operculate series). 1970J. Webster Introd. Fungi i. 25 In the inoperculate chytrids..the sporangium forms a discharge tube which penetrates to the exterior of the host cell. |