I found four of these queens on 3-30-2018 at Chaney Trail in Altadena, California. At first we weren't sure what they were, as they didn't look like all-black C. vicinus, and certainly did not look like C. quercicola. After doing some reading, nurbs found them to possibly be C. maritimus. I put one of mine under the microscope, and all the features seemed to match.
ID Thread: http://www.formicult...na-ca-3-30-2018
I have two of them in test tubes, and two in two of my starter formicariums.