A Rohnert Park woman who was pulled over to the side of Highway 101 before dawn Thursday was arrested on suspicion of drunken driving and endangering her 2-year-old son, who was in the vehicle, CHP officials said.

CHP officers pulled over to assist with a Ford Explorer parked on the northbound highway’s right shoulder at about 3:20 a.m. near Rohnert Park Expressway. Driver Mayra Ponce, 24, told the officers she had been arguing with her passenger, a man slumped over in the passenger seat, CHP Officer Jon Sloat said in a press release. Ponce appeared intoxicated, and officers arrested her after she showed them an open container of beer she had been drinking and failed a sobriety test, Sloat said.

Passenger Edgar Sanchez, 22, of Napa argued with officers over Ponce’s arrest, claimed he could drive and refused to call for a ride for himself and the child, according to Sloat.

Sanchez was arrested on suspicion of public intoxication. The child was released to a family friend.

How to help

State scientists are seeking help with data collection and other activities, as well as observational accounts, photos and videos related to the urchin barren. Shared images and information should, if possible, include the date, location and depth at which they were acquired. Contact Cynthia Catton at Cynthia.Catton@wildlife.ca.gov or 875-2072.