Open Access
Table 2
The related taxonomic morphology of chiggers, the larvae of chigger mites (cited from Stekolnikov, 2013 [49]).
| Abb. | Corresponding morphology |
|---|---|
| AL | Length of anterolateral scutal setae |
| AM | Length of anteromedian scutal seta |
| AP | Distance from AL to PL on one side |
| AW | Distance between anterolateral scutal setae |
| D max | Length of the longest dorsal idiosomal seta |
| D min | Length of the shortest dorsal idiosomal seta |
| DS | Number of dorsal idiosomal setae (including humeral) |
| fCx | Coxal setation |
| fT | Formula of palpotarsus |
| H | Length of humeral setae |
| Ip | Sum of leg lengths (pa + pm + pp) |
| NDV | Number of idiosomal setae (DS + VS) |
| Oc | Eyes on ocular plates |
| ASB | Distance from the level of sensillary bases to extreme anterior margin of scutum |
| fsp | Leg segmentation formula, the numbers of apparent segments of each pair of legs |
| fD | Dorsal setal formula including number of humeral setae (H) and arrangement of dorsal idiosomal setae by rows |
| fSt | Sternal setal formula, the numbers of anterior (between coxae I) and posterior (between coxae III) sternal setae |
| fp | Palpal setation formula (N = nude, B = branched) including conditions of palpal femoral seta, palpal genual seta, and three palpal, tibial setae (dorsal, lateral, and ventral) |
| pa | Length of leg I (including coxa) |
| PL | Length of posterolateral scutal setae |
| pm | Length of leg II (including coxa) |
| pp | Length of leg III (including coxa) |
| PW | Distance between posterolateral scutal setae |
| S | Length of sensilla |
| SB | Distance between sensillary bases |
| SD | Length of scutum (ASB + PSB) |
| TaIIIL | Length of leg tarsus III |
| TaIIIW | Width of leg tarsus III |
| V max | Length of the longest ventral idiosomal seta |
| V min | Length of the shortest ventral idiosomal seta |
| PLs | The horizontal line of the base of posterolateral scutal setae |
| VS | Number of ventral idiosomal setae (excluding coxal and sternal) |
| PSB | Distance from the level of sensillary bases to extreme posterior margin of scutum |
| SIF | Synthetic identification formula which is generally accepted in the taxonomy of chigger mites |
| P-PL | Distance from the level of posterolateral scutal setae to extreme posterior margin of scutum |
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