Corresponding author: Remani R. Rachana (
Academic editor: Pavel Stoev
An identification key is provided to the four genera of
Rachana RR, Mound LA, Rayar SG (2019) Tryphactothripini of India (Thysanoptera, Thripidae, Panchaetothripinae), with identification keys and a new record of
The
Members of this tribe are restricted to the tropics, with a few
1 | Fore wing distal half with costal setae longer than fringe cilia |
|
– | Fore wing distal half with costal setae shorter than fringe cilia |
|
2 | Genae without protruding fringe of pale sculpture; fore wing uniformly shaded with apex sharply paler |
|
– | Genae with protruding fringe of pale sculpture, fore wing with dark and light bands |
|
3 | Abdominal tergites III–VII with paired clusters of round sculptured areolae, striated across anterior third, bearing sigmoidal setae |
|
– | Abdominal tergites III–VII without paired clusters of round sculptured areolae; reticulated across anterior third, sigmoidal setae present or absent |
|
This genus was based originally on a single species that had been described from a single female collected in New Guinea, but four generic synonyms are listed in
It is an Old World genus that is restricted to tropical countries, with two species from Africa and 10 distributed between Pakistan and New Guinea (
Species | No. of antennal segments | Distribution | Host associations | Larvae found |
---|---|---|---|---|
|
8 | India | No | |
|
7 | China; Japan; Philippines | No | |
|
5 | Malaysia; Australia |
|
No |
|
5 | Nigeria | On |
|
|
6 | Malaysia; China; Taiwan | No | |
|
6 | India; Myanmar; Malaya; Thailand; Philippines; New Britain; New Guinea; Japan | No | |
|
7 | India; Nepal | No | |
|
6 | India | No | |
|
5 | Nigeria; Ghana; Sudan | On |
|
|
7 | India; Pakistan | No | |
|
8 | Myanmar; China | “bamboo” | No |
|
7 | India, Pakistan; Sri Lanka; Malaysia; Myanmar; Indonesia; Philippines; Thailand; Japan; Australia | No |
Small, dark brown, strongly reticulate
The 8-segmented condition of antennae is considered plesiotypic for the family
Species level taxonomy in this genus is based on some relatively trivial character states, each of which may have been observed on very few specimens.
1 | Antennae 8 segmented; segments separated by clear sutures |
|
– | Antennae with 5 to 7 segments |
|
2 | Pronotum posterior margin without a sub-marginal transverse apodeme [male with no sternal pore plates] |
|
– | Pronotum posterior margin with distinct transverse sub-marginal apodeme |
|
3 | Pronotal sub-marginal transverse apodeme weak, present only on median third (Fig. |
|
– | Pronotal sub-marginal transverse apodeme strong, extending fully across pronotum (Fig. |
|
4 | Antennae 6-segmented; mesoscutal anterior notch shorter than median intact part [male with pore plates on sternites V–VII] |
|
– | Antennae 7-segmented |
|
5 | Antennal segments V–VII separated by clear sutures; male not known |
|
– | Antennal segments V–VII not separated by clear sutures; male with pore plates on sternites IV–VII |
|
The genus was erected with the type species
Antennae 8-segmented, III and IV with forked sense cones. Head without conspicuous raised structure, postocular seta 4 strongly developed, ocellar hump small; maxillary palps bi-segmented. Pronotum with weakly raised sculpture. Mesoscutum not notched anteriorly; metascutum with prominent reticulate triangle. Tarsi 1-segmented. Fore wing with slender pointed setae; costal setae longer than fringe cilia; posteromarginal setae wavy. Abdominal tergite I with a postmarginal flange; II anterior margin constricted, with narrow plate like cuticular processes laterally; III–VII with transverse reticulations on anterior half, posterior half smooth; X asymmetrical, divided longitudinally. Males smaller; sternites IV–VII each with transversely elongated anteriorly concave pore plates.
The reports of
Antennae 8-segmented, III and IV with thin, Y-shaped sense cones with the arms curving around the segment. Head polygonally reticulate, cheeks constricted at base; maxillary palps bi-segmented. Pronotum uniformly reticulate, two pairs of campaniform sensilla, one pair of long setae. Mesoscutum entire; metascutum with reticulate triangle. Tarsi 1-segmented. Fore wing with prominent veins, costal setae shorter than fringe cilia; posteromarginal setae wavy. Abdominal tergite I reticulate, median pair of setae minute; II strongly constricted, wart-like tubercles laterally; III–VII with thick antecostal line; X asymmetrical, divided longitudinally.
Three females, Chitradurga, Karnataka, India, on unidentified weed, 04 December 2017, Rachana R.R. leg. Two females deposited in the Insect Museum, National Bureau of Agricultural Insect Resources (ICAR-NBAIR), Bengaluru, India. One female deposited in ANIC – Australian National Insect Collection, CSIRO, Canberra.
Body yellowish brown (Fig.
Various workers on
Antennae with six segments, terminal segments fused into an elongate unit. Head with raised sculpture covering cheeks and vertex; maxillary palps bi-segmented. Pronotum with raised sculpture anteriorly and on anterolateral angles. Mesoscutum slightly notched. Tarsi 1-segmented. Fore wing with anterior vein fused to costa at fork of veins; costal setae shorter than costal cilia; posteromarginal cilia wavy. Abdominal tergite II sharply constricted, laterally with double based rod like processes; III–VII with paired clusters of round sculptured areolae, striated across anterior third, bearing pair of sigmoidal setae laterally; VIII with no posteromarginal comb; X asymmetric, divided longitudinally.
The authors are grateful to Andrea Hastenpflug-Vesmanis, Senckenberg Museum, Frankfurt, for sending on loan to Canberra a specimen of
* From original description
* from original description