Key to Dicranus
Adapted from Carrera, 1955. Carrera did not have access to specimens of D. jaliscoensis, so this key will need to be modified/updated.
1a Mystax yellow; legs entirely yellow or with black spots……2
1b Mystax and legs entirely black………….nigerrimus
2a Black bristles and hairs on the lateral margins of the mesonotum; abdominal tergites 2-4 with grey pollen on the sides of the posterior margins; the last three tarsal joints black…..3
2b Yellow bristles and hairs on the lateral margins of the mesonotum; abdominal tergites 2-4 with
thick yellow pilosity on the sides of the posterior margins ; all tarsi yellow……rutilus
3a Anterior tibiae yellow with an elongated black spot on the ventral surface ; black bristles and hairs on the ocelar callus and occiput ( at least in schrottkyi)……….4
3b Anterior tibiae wholly yellow; yellow bristles and hairs on the ocelar callus and occiput….tucma
4a Antennae black; scutellum witli grey pollen on the dorsum………schrottkyi
4b Antennae and scutellum yellow…..jaliscoensis
