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Table 2 Morphological comparison of I. vespertilionis , I. ariadnae sp. nov. and I. simplex female
| Trait | I. vespertilionis* | I. ariadnae sp. nov. | I. simplex* |
|---|---|---|---|
| Max. engorged size | 10 | 7 | 4.5 |
| Length of legs | long (tarsus I: 1.6) | long (tarsus I: 1.5) | moderately long (tarsus I: 0.73) |
| Basis capituli | - dorsally posterolaterally flange | - dorsally posterolaterally flange | - dorsally no flange (ventrolaterally triangular ridge) |
| - posteriorly sinuous | |||
| - posteriorly straight | |||
| - posteriorly slightly curved with dorsal ridge | |||
| Palps (II+III segments) | long, narrow (0.39 + 0.22) | short, broad (0.28 + 0.16) | short (0.16 + 0.14) |
| Joining of II-III segments | distinct | distinct | indistinct |
| Hypostome | long, 15 rows of slender teeth, ventrally in 6-8 lines | medium, 10 rows of broad teeth, ventrally in 4 lines | short, 8 rows of broad teeth, ventrally in 4-6 lines |
| Areae porosae | large, oval, interval broad | large, oval, interval slightly broad | large, oval, interval narrow |
| Scutal setae | anterolaterally prominent | anterolaterally very few | anterolaterally prominent |
| Scutal length per width | 1.76/1.08 (approx. 1.6) | 1.15/0.95 (approx. 1.2) | 1.13/0.8 (approx. 1.4) |
| Idiosoma hair covering | dense | sparse | dense |
| Coxae | posteroexternally concave, surface flat | posteroexternally convex, surface rounded | posteroexternally concave |
| Anal groove | parallel | posteriorly slightly divergent | posteriorly markedly divergent |
| Spiracle opening | oval, regular outline | oval, irregular outline | (sub)circular, broad |
