congeneric

He arrives at this conclusion from a geographical survey of what he would call the "whole field of distribution," and "the probable historical connection between these congeneric species."

From Life: Its True Genesis by R. W. Wright

The seats, however, of barbarous hordes, in a waste and almost desert country, are seldom stationary for any continuance; and the Ballogees and Sewees are probably congeneric tribes, much intermixed, and having no fixed boundaries.

From A General History and Collection of Voyages and Travels — Volume 09 Arranged in Systematic Order: Forming a Complete History of the Origin and Progress of Navigation, Discovery, and Commerce, by Sea and Land, from the Earliest Ages to the Present Time by Robert Kerr

The point to be made here is simply this: If the species in question are to be considered congeneric then it might reasonably be expected that they would display some similarity in nidification and egg-laying.

From Jaw Musculature of the Mourning and White-winged Doves by Robert L. Merz

He had allowed some years to pass since Davy's brilliant discovery of potassium and its congeneric metals, without a word about them in his lectures.

From Great Men and Famous Women. Vol. 6 A series of pen and pencil sketches of the lives of more than 200 of the most prominent personages in History by Charles F. (Charles Francis) Horne

As a matter of fact Chicken-pox is of congeneric origin with small-pox, with which, in a very much milder degree, it has various features in common.

From Valere Aude Dare to Be Healthy, Or, The Light of Physical Regeneration by Louis Dechmann