Bargas 1

Dune Weevil

Larinus arenarius

descended from Larinus stebbingi

As the climate became drier and sand dunes more prevalent, Larinus stebbingi adapted to the new terrain. Over time, its descendants developed stronger front legs for burrowing into the sand and longer antennae to detect prey and predators in the shifting dunes. Their diet shifted to specialize on the seeds of Opuntia spp., which were abundant in the area. The elytra became more armored to protect against the abrasive sand and to conserve water.

Thorn-Thistle Borer

Eryngiorestis thorntoni

descended from Trichodes ornatus

Trichodes ornatus, which previously fed on a variety of plants, began to specialize on Eryngium (Thistle) and similar spiny plants. Over generations, its larvae developed the ability to bore into the tough stems of these plants. As a defense, the adults evolved camouflage on their elytra to blend in with the thistle spines, reducing predation risk. This specialization allowed them to thrive in areas where other beetles struggled to survive.

Dwarf Goldfields Mite

descended from Encelia californica

In response to intense sunlight and dry conditions on rocky outcrops, Encelia californica gave rise to a small, mite-like creature. This descendant evolved to feed on sap and small insects, supplementing its diet with limited photosynthetic capabilities. It developed chemical defense compounds to deter herbivores and a waxy coating to conserve water. Over time, its body size decreased to minimize water loss, leading to the Dwarf Goldfields Mite.