The phrase "an additional specimen of" is correct and usable in written English.
It can be used when referring to an extra example or sample of something, often in scientific or formal contexts.
Example: "The researcher submitted an additional specimen of the rare plant for further analysis."
Alternatives: "a further example of" or "an extra sample of".
We just wanted to wait for an additional specimen". A couple of months later, in May 2018, Mississippi State University entomologist John MacDonald contacted Nakahara from a collecting trip in Panama.
The 12 cadaver specimens were initially intended to form 3 equal groups, but the challenges faced with MRI settings required the use of an additional specimen, which resulted in unequal group sizes.
Additional specimens of A. africanus have been found at other South African sites, including Sterkfontein and Makapansgat.
It may represent an evolutionary novelty only shared by the type specimen of H. antecessor and modern humans, but additional specimens of H. antecessor and other hominins of similar geological age are required to clarify this.
After detection of changes in fetal hematopoiesis indicative of infection, examination of additional specimens of placenta and membranes will document the diagnosis of chorioamnionitis.
The discoveries included three new species and additional specimens of two previously named types.
Additional specimens of Myotis alcathoe have been identified in Italy using molecular methods.
Numerous additional specimens of Deinosuchus were discovered over the next several decades.
Specimens collected previously, but labeled with question marks, were positively identified as Tiktaalik pelvises, giving the team four additional specimens of the crucial skeletal feature.
It would be extremely important to corroborate this observation by discovering additional specimens of †Diacodexis.
