You can create your own layouts for your Dynamic Content and put them in
MVC/Views/<Custom Module>/List.My Content Type.cshtml
MVC/Views/Custom Module/Detail.My Content Type.cshtml
When you create the Dynamic content type Sitefinity will auto-generate a widget with templates for it.
You can go to Design -> Widget templates to inspect and eventually re-use the code within your custom templates.
You can also refer to the below article for more details on this and the convention you need to follow:
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items