jeremyr's picture

Diptera terminology

I'm wondering if 'third antennal-joint' (Collin 1943) means the thin area between the 2nd & 3rd segments or is it another/older way of describing the 3rd antennal segment. Can anyone clear this up for me please so I can proceed through a fairly old key?

Also, what does 'quadriserial' mean? It's in relation to 'acrostichal microchetae', which I take to mean tiny hairs (between dc bristles)

Could quadriserial possibly be referring to the square area between the four dc bristles which follow the anterior pair??

cheers,
Jeremy

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Mydaea's picture

'is it another/older way of

'is it another/older way of describing the 3rd antennal segment' --- yes.

'what does 'quadriserial' mean?' --- in 4 rows.

jeremyr's picture

quadriserial

thanks a lot Mydaea. Referring to dc bristles, all post-sutural, the line is "..acrostichal microchetae between this front pair more than quadriserial."

Does it mean then simply more than four rows? Indeed, looking at my specimen (a Tephrochlamys) I can see what appear to be six longitudinal rows of minute hairs between the bristles.

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Mydaea's picture

I would say that 'more than

I would say that 'more than quadriserial' would cover six rows, but I don't know the key, so caveat emptor!

jeremyr's picture

hexiserial?

I've fleshed out the key here with the species concerned - image 5 (dorsal view) seems to give a reasonable view http://www.ispot.org.uk/node/314288

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John Bratton's picture

Yes, more than quadriserial

Yes, more than quadriserial means more than four rows, and this fits your photo.

JohnColdwell's picture

I've seen the third antennal

I've seen the third antennal joint referred to as the first flagellomere, just to confuse matters.