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Apterothrips apteris
Fig. 1


Fig. 2


Fig. 3


Fig. 4


Fig. 5

Sternites 3-4

Fig. 6

Tergites 5-6

Fig. 7


Fig. 8



Fig. 1: Antenna (inset: VI.-VIII. [IX.] antennal segment)
Fig. 2: Head dorsal
Fig. 3: Pronotum
Fig. 4: Meso- and metanotum
Fig. 5: Sternites III and IV with craspeda
Fig. 6: Tergites V and VI
Fig. 7: Tergites VIII-X
Fig. 8: Tergites IX and X

Taxonomic Information

Apterothrips apteris (Daniel, 1904)

Apterothrips delamarei Bournier, 1962
Sericothrips ineptus Ahlberg, 1922
Sericothrips stanfordii Moulton, 1907
Sericothrips apteris Daniel, 1904

Common name:
None established

Present taxonomic position:
Family:Thripidae Stephens, 1829
Subfamily:Thripinae (Stephens) Karny, 1921
Genus: Apterothrips Bagnall, 1908


Species Recognition

General information about the genus Apterothrips:
There are only two species known in this genus. Both species are dark brown, have well developed craspedum on the posterior margins of the tergites, the antennae have 8 segments and both species are commonly found wingless. Only one species is included in this key.

Typical character states of Apterothrips apteris:

Body color
Mainly brown

Number of antennal segments: 8 (-9)
Segments II and III shape: more or less symmetric
Segments III & IV sensoria: emergent and simple
Base of sensorium on antennal segment VI: no more than 2 times as wide as base of nearest seta
Terminal antennal segments: rarely elongate

Head shape between compound eyes: not prolonged
Ocellar setae III on head: arising on anterior margin of, or in front of, ocellar triangle
Postocular setae I: present
Surface of head, pronotum and fore legs: without strong reticulate sculpture
Ocellar setae I in front of anterior ocellus: present

Number of pairs of elongate pronotal setae: 0-3
Number of pairs of elongate posteroangular pronotal setae: 0
Pronotum shape: rectangular

Mesothoracic endofurca: without median spinula

Metanotal median setae length: longer than lateral metanotal setae - shorter than lateral metanotal setae Metanotum: with campaniform sensilla
Metanotum major sclerite: with only one major sclerite, this is at least twice as wide as long
Metanotum median area: with no equiangular reticulation
Metanotum sculpture: without dominant sculptured triangle medially
Metathoracic endofurca: transverse, sometimes with simple median spinula

Wings: absent

Fore tibial apex: not extending around fore tarsus
Mid and hind tarsi: with two segments

Abdominal pleurotergites: not covered in microtrichia
Abdominal segment X: never tubular, longitudinally incomplete ventrally in both sexes
Abdominal sternite II: with marginal setae but no discal setae
Abdominal sternite III of female: without glandular areas
Abdominal sternite VII median marginal setae: arising in front of margin
Abdominal sternites IV , V and VI: with marginal setae but no discal setae
Abdominal tergites: without curved wing-retaining setae
Abdominal tergites IV & V median setal pair: much shorter than distance between their bases
Abdominal tergites V-VII: without paired ctenidia, sometimes with irregular microtrichia
Setae on abdominal tergite X: slender
Surface of lateral thirds of abdominal tergites: without regular rows of fine microtrichia
Ctenidia on tergite VIII: not present, but groups of microtrichia
Tergite VIII posteromarginal comb of microtrichia: absent



Life history:
As with other thrips species the life cycle from egg to adult is dependent on temperature. The full cycle can take a couple of weeks to over a month and adults may live for more than one month producing several generations in one year depending on seasonal weather.

Host plants:
Erigeron glaucus (Asteraceae) (California, USA), Medicago (Fabaceae), Allium sativum (Liliaceae) and grasses (Poaceae).

Vector capacity:
None identified

Current known distribution:
Australia/New Zealand, Central and South America, North America, California

Additional notes:
Primarily found on Erigeron glaucus along the Northern coast of California, USA and on garlic in regions South of California causing leaf deformation.


Moritz G, Morris DC, Mound LA (2001): ThripsID - Pest thrips of the world. ACIAR and CSIRO Publishing Collingwood, Victoria, Australia, CDROM ISBN 1 86320 296 X.
Moritz G, Mound LA, Morris DC, Goldarazena A
(2004): Pest thrips of the world - an identification and information system using molecular and microscopial methods. CBIT, University of Queensland,CDROM ISBN 1-86499-781-8.

Mound, LA & Kibby, G (1998): Thysanoptera: An identification guide, Second edition.
Mound LA & Marullo, R (1996): The thrips of Central and South America: An Introduction (Insecta: Thysanoptera). Associated Publishers, Gainesville.

Mound, LA (2005): Thysanoptera (Thrips) of the World - A Checklist. http://www.ento.csiro.au/thysanoptera/worldthrips.html