[Taxacom] ductus bursa or ductus bursae?

[Stephen Thorpe]

 Even if there is only one per moth, one can still talk about ductus bursae in a general pleural sense, e.g. the ductus bursae in this species are ... as opposed to the ductus bursa in this individual is ...
Stephen
    On Tuesday, 20 July 2021, 02:11:42 pm NZST, Soowon Cho via Taxacom <taxacom at mailman.nhm.ku.edu> wrote:  
 
 Dear members,

I use terms like 'ductus bursae' or 'corpus bursae' to describe the female
genitalia in Lepidoptera taxonomy. However, I am confused as the term
ductus bursae is a plural noun while only one ductus bursa is in the female
genitalia.
I searched the internet and found examples such as 'ductus bursa is',
'ductus bursae are', and 'ductus bursae is', so I was more confused.
Can someone please clarify this for me?

Sincerely,

-- 
Soowon Cho
chosoowon at gmail.com
Dept Plant Medicine
Chungbuk Nat'l Univ
Cheongju, 361-763
KOREA
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