MYLAGAULIDAE INDET.

Maguire, Kaitlin Clare & Schmitz, Joshua X. Samuels and Mark D., 2022, The fauna and chronostratigraphy of the middle Miocene Mascall type area, John Day Basin, Oregon, USA, PaleoBios 35, pp. 1-51 : 20

MYLAGAULIDAE INDET.

Referred specimens —From JDNM-4*: Partial left dentary with dp4 through m2 and erupting p4, JODA 2329. From UCMP -3059: right partial dentary with m1, m2, and erupting m3, UCMP 39292.

Occurrence —JDNM-4*, UCMP -3059*.

Description —JODA 2329 is described in Calede and Hopkins (2012). UCMP 39292 has quadrate m1 with 5 fossettes and two roots, more ovoid m2 with 5 fossettes and an unworn m3 with pronounced metaconid.

Remarks —Because JODA 2329 is a juvenile specimen, Calede and Hopkins (2012) did not assign it to a species but suggested it is either Alphalaugus vetus Matthew, 1924 or Hesperogaulus gazini . Alphalaugus vetus has been recovered from Mascall age-equivalent deposits in the Crooked River region to the south, but has not been identified from the type Mascall area to date. It was found by the Weatherfords and therefore the exact locality is unknown. UCMP 39292 may also belong to A. vetus or H. gazini based on size, but without the p4 it is impossible to identify further.