What is the scientific name of a pumpkin

I found Cucurbita maxima Duchesne but that includes pumpkin and squash and whatnot. I want pumpkin and only pumpkin.

Commonly refers to cultivars of any one of the species Cucurbita pepo, Cucurbita mixta, Cucurbita maxima, and Cucurbita moschata, and is native to North America. They typically have a thick, orange or yellow shell, creased from the stem to the bottom, containing the seeds and pulp.

The term "pumpkin" has been the subject of many scholarly discussions. The scientific name of most pumpkins is Cucurbita pepo (Jack-o- lantern types). Many of the large fruited types such as ‘Boston Marrow’ and ‘Mammoth’ are Cucurbita maxima, while the buff-colored sugar-pie or ‘Dickinson’ variety, Cucurbita moschata, are excellent for pies or processing. All pumpkins have hard shells when mature.