In the female genitalia, two general types of signa are observed in the corpus bursae: the "ediacaroid" signum (sensu Mally et al. 2019) has the transverse axis more or less reduced, and the signum is elongate and zipper-shaped to nearly circular; the second type is formed by a circle of radiating spines.

These plesiomorphic characters include the absence of a longitudinal sclerotized strip on the pleural membranes of the male abdominal segment 8, a straight or concave costa of the valves and an evenly sclerotized phallus apodeme in the male genitalia, as well as the "ediacaroid" signum and an appendix bursae in the female genitalia.

Recorded food plants of Hydririni larvae are predominantly Sapindaceae: Allophylus psilospermus, A. racemosus, Paullinia bracteosa, P. costaricensis, P. faginea, P. fuscescens, P. grandifolia, P. turbacensis, Serjania atrolineata, S. mexicana, S. rhombea, S. schiedeana, S. valerioi, and Urvilea ulmacea.

[4] A single case of feeding on the Fabaceae, Senna obtusifolia is recorded for a Costa Rican specimen of Lamprosema,[4] and the young larvae of Hydriris ornatalis feed on the leaf undersides of Ipomoea batatas (Convolvulaceae) and related plants, whereas older larval instars skeletonize the leaves.

Minet's original placement of the tribe in Glaphyriinae is likely due to homplastic characters shared by both groups, like the spatulate scales of the hindwings and the spinose signa in the corpus bursae of the female genitalia.