Sentence:  The closest affinities of the Jubulaceae are with the Lejeuneaceae. The two families share in common: ("a") <WSD>elaters</WSD> usually 1-spiral, trumpet-shaped and fixed to the capsule valves, distally... 
Meaning of the word marked with <WSD> tags:  A long, slender cell produced among spores and having hygroscopic secondary cell wall thickenings.