Diptera.info :: Identification queries :: Diptera (adults)
 From a greenhouse in Madrid -> Scaptomyza cf. adusta
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| Jfdocampo |
Posted on 09-08-2019 07:43
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Member Location: Madrid (Spain) Posts: 1094 Joined: 01.11.15 |
On a Impatiens sp. plant. 23th September, 2017. Body size about 2 mm. Regards, Jfdocampo attached the following image:  [112.47Kb] Edited by Jfdocampo on 12-08-2019 07:38 |
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| Jfdocampo |
Posted on 09-08-2019 07:44
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Member Location: Madrid (Spain) Posts: 1094 Joined: 01.11.15 |
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Jfdocampo attached the following image:  [111.34Kb] |
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| Paul Beuk |
Posted on 09-08-2019 08:27
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Could be a Scaptomyza. The only one that supposedly has a wing spot in the female is S. adusta, a Nearctic species introduced in the Mediterranean.
Paul - - - - Paul Beuk on https://diptera.info |
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| John Carr |
Posted on 09-08-2019 12:57
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 Super Administrator Location: Colorado, USA Posts: 10637 Joined: 22.10.10 |
Paul Beuk wrote: Could be a Scaptomyza. The only one that supposedly has a wing spot in the female is S. adusta, a Nearctic species introduced in the Mediterranean. Quoting the description of Scaptomyza adusta in an American reference: The males and females of this slender, light brownish-gray, medium-sized species look similar. The thorax displays two light longitudinal bands that flank a darker dorsal midline. The abdominal pigmentation pattern is usually dull. The wings display one apical wing spot. The maxillary palpi are light. Two ventral branches exist below the fork of the arista (not counting the fork). The thorax has four rows of acrostichal bristles and one prominent humeral bristle. The ratio of apical to basal scutellar bristle length is 2/3. The apical scutellar bristles are crossed and stand at a higher angle than the basal scutellar bristles. Similar species: S. terminalis has two prominent humeral bristles but looks otherwise identical. Tips for collecting and breeding: The flies of this species can be reared or collected with a net from skunk cabbage. https://digitalco...oabooks/1/ |
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| Jan Maca |
Posted on 09-08-2019 13:47
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Member Location: Posts: 1296 Joined: 25.03.10 |
The fly has apparently only two rows of acrostichals, which would indicate S. okadai (known from Japan nd Russian Primorye). In order to determine it safely, specimens should be seen (especially male). |
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| Paul Beuk |
Posted on 09-08-2019 14:19
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
On the second picture there are some clear acrostichal setae in the pale area between the median acrostichal setae and the dorsocentral setae...
Paul - - - - Paul Beuk on https://diptera.info |
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| Jan Maca |
Posted on 09-08-2019 15:12
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Member Location: Posts: 1296 Joined: 25.03.10 |
Then yes, adusta would fit well. But I do not think that two setae each side in the foremost part of mesonotum can be considered a "row". Anyway, specimens are desirable. |
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| Paul Beuk |
Posted on 09-08-2019 15:57
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Jan Maca wrote: That goes without saying.
Anyway, specimens are desirable. Edited by Paul Beuk on 09-08-2019 15:57 Paul - - - - Paul Beuk on https://diptera.info |
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| Jfdocampo |
Posted on 12-08-2019 07:38
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Member Location: Madrid (Spain) Posts: 1094 Joined: 01.11.15 |
Very interesting discussion. I think I'll name it Scaptomyza cf. adusta for precaution. Thanks to everybody. |
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