Pseudonomoneura nelsoni

Females are distinctively globose (i.e. thorax and abdomen appearing somewhat more inflated than in most female Pseudonomoneura ); and are typically yellowish, with brown markings on thorax and abdomen. Males are smaller and narrower (not globose), and darker brown throughout; and with a bushy tuft of white hair on the face and frons, and more white hairs throughout. The original 1995 description of P. nelsoni can be read at this BHL link . Unlike most other species of Pseudonomoneura , the proboscis in P. nelsoni is vestigial and virtually invisible, as in most Nemomydas . (Two other species from Baja California share this distinction, P. bajaensis and P. calderwoodi ). Also note that in this species, the antennal club (= 2nd flagellomere) is appreciably longer than the 1st flagellomere...and thus it does not conform with the primary character separating Pseudonomoneura from Nemomydas in couplet 6 of the key to genera for Mydidae in the MND ...which was written before P. nelsoni was described.