Grand Taxonomy

Grand Taxonomy refers to the master, ever-expanding index of conceptual taxa maintained by the Department of Speculative Biology on Floor 112. It is a living document that classifies all accepted implied fauna and flora according to principles established during Great Taxonomy of Implied Fauna (Project GIFT) and subsequently formalized by Clause 19 of the Third Concordance (Amendment 4). The Taxonomy's primary function is to resolve nomenclatural disputes and provide a standardized framework for all formal biological submissions, such as those filed via Form 112-α.

Structure and Organization

The Grand Taxonomy is organized hierarchically across multiple tiers, from broad conceptual Domains down to specific Variants. The foundational level is the Domain, which defines the core unrealized principle of an organism’s existence (e.g., Domain Chronosyncratica for entities defined by temporal paradox). This is followed by Phylum (systemic expression), Class (morphological intent), Order (behavioral schema), Family (relational niche), Genus (specific unrealized form), and Species (proposed instantiation). A final, optional tier, the Variant, catalogues notable hypothetical deviations within a species, such as color phases that cannot be perceived or songs that cannot be heard.

The physical manifestation of the Taxonomy occupies the central Atrium of Unseen Lineages on Floor 112. It consists of a continuous, curving parchment scroll, approximately 0.75 meters wide, which is mechanically advanced and annotated by a dedicated cadre of Librarian-Taxonomists. As of the last official audit (Aperture 312, Spiral 7), the scroll measured 4.2 kilometers in length.

Governance and Amendments

Authority over the Grand Taxonomy is vested in the Bureau of Implementable Abstraction, specifically its Subcommittee on Nomenclatural Integrity. Proposals for new entries or revisions must be submitted on Form 112-α and are subject to a tripartite review process: verification of conceptual coherence, assessment of potential taxonomic conflict, and a final vote of alignment with the principles outlined in the Taxonomy of Qualia Weights. Amendments are published quarterly in the Gazette of Provisional Taxa.

Disputes are common, particularly regarding the placement of organisms that exhibit characteristics spanning multiple Domains. The infamous case of the Somnolent Mimer, an entity classified under both Oneirofauna and Mimicridae, required the invocation of Clause 7, Annex Ω of the Fifth Concordance to create a precedent for dual-domain indexing.

Scholarly Divergences

A persistent and unresolved scholarly divergence concerns the taxonomic status of so-called "Negative Taxa." One school of thought, led by the Cartesian Speculists of Floor 89, argues that organisms defined primarily by absence—such as the Void-Swallower or the Silence Finch—require their own parallel taxonomic structure, as they violate the positive-definition requirement of the Grand Taxonomy's foundational clauses. The opposing view, championed by the Realized Absence Guild, holds that absence is merely a qualia weight of zero and should be integrated into the existing framework, a position supported by a controversial reinterpretation of the Taxonomy of Qualia Weights. This debate has stalled the formal classification of seventeen submitted species for over a century.

Practical Applications

Beyond its archival role, the Grand Taxonomy serves several critical practical functions within the Tower. It provides the referential backbone for all bestiaries and florilegia. Furthermore, it is used by the Department of Architectural Symbiosis to determine compatible conceptual ecosystems for the bio-luminal grottos of Floor 306 and the harmonic aviaries of Spire 44. Perhaps most importantly, it supplies the standardized nomenclature required for all inter-departmental communications regarding fauna, preventing the bureaucratic chaos that once arose from the use of seventeen different names for the same hypothetical moss.

Related Indices

The Grand Taxonomy is not the only classificatory scheme within the Tower, though it is the most comprehensive for biological entities. The Table of Ephemeral Minerals on Floor 201 catalogues non-organic matter, while the Registry of Recursive Processes on Annex B deals with self-referential events and algorithms. A proposed merger between the Grand Taxonomy and the Table of Ephemeral Minerals, to create a unified "Taxonomy of All Unrealized Substance," was debated for fifty years before being tabled indefinitely by Concordance edict, citing "irreconcilable differences in foundational ontology."