Abstract: The use of evolutionary explanations to account for proximate phenomena has been labeled by various authors as an explanatory error, the so-called phylogeny fallacy. In this paper, this fallacy will be analyzed in the context of teleosemantics. I will discuss whether teleosemantics projects that rely on the Selected-Effect Theory of Functions (i.e., mainstream teleosemantics) generally commit the fallacy. To frame the discussion, I will present two desiderata that, as argued here, every teleosemantic project must fulfill. The actuality desideratum, motivated (...) by Brentano’s problem, demands for a proximate analysis of the properties that make a system intentional. The historical desideratum, on the other hand, says that a teleological view of intentionality requires a historical dimension in order to understand the causal basis of teleological explanations. While I give some reasons why mainstream teleosemantics might be implicated in the phylogeny fallacy, my main argument aims to highlight an explanatory gap in mainstream teleosemantics: the population perspective on teleofunctions is inadequate to explain the proximate properties of intentional systems. In other words, the account of the historical desideratum in population-evolutionary terms prevents an adequate solution to the actuality desideratum. This is related to two central goals of teleosemantics: The goal of explaining content determination by recourse to natural selection processes makes it impossible to solve another goal of teleosemantics, the so-called problem of representational status. I analyze this situation and argue that inherited information (sometimes interpreted in a teleosemantic sense) plays the role of closing the gap. This leads teleosemantics into a complex situation: in order to close the gap, it must commit the fallacy. At the end of the article, I propose an alternative to fulfill both desiderata, motivated by an evo-devo perspective. I state that lineage explanations have the property of providing historical explanations based on proximate causes. (shrink)