Primary type information:
Primary type material: holotype worker. Primary type locality: Australia: New South Wales, Martinville, near Morisset (ca 80 mi. N of Sydney), Dora Creek, 4.ix.1956 (T.C. Mercovich). Primary type depository: QMBA.
Secondary type information:
Secondary type material: 45 paratype workers, 4 paratype queens. Secondary type localities: 45 paratype workers with same data as holotype, 1 paratype queen New South Wales, Como, 3 paratype queens New South Wales, Galston Gorge, Cowan Creek, and Calga. Secondary type depositories: AMSC, ANIC, MCZC, MVMA, QMBA.
[Orectognathus nigriventrisBrown, 1958b: 28 (diagnosis in key), attributed to Mercovich ms. (date of publication 10.i.1958). Unavailable name (published without designation of type material).]
[Note: the comment by Brown, 1958b: 17, and the notation on p. 28, “(nigriventris Mercovich ms.)” make it clear that Brown did not intend the name to be made available in his publication.]