Matsya Purana — Characteristics of Dvāpara and Kali Yugas
गोत्रेण वै चन्द्रमसो नाम्ना प्रमतिरुच्यते कलिसंध्यांशभागेषु मनोः स्वायम्भुवे ऽन्तरे //
gotreṇa vai candramaso nāmnā pramatirucyate kalisaṃdhyāṃśabhāgeṣu manoḥ svāyambhuve 'ntare //
In Manu’s Svāyambhuva Manvantara, within the fractional divisions known as the Kali-sandhyā portions, Pramati is indeed spoken of by name as belonging to the Candramas (Moon) gotra.
This verse is not describing Pralaya; it situates a named figure (Pramati) within the Svāyambhuva Manvantara and a specific chronological subdivision (Kali-sandhyā portions), emphasizing Purāṇic time-keeping rather than cosmic dissolution.
Indirectly, it supports dharma through lineage-memory: knowing gotra and ancestral lines is tied to rites (śrāddha, marriage rules, and ritual eligibility), which are central householder duties and to a king’s role as preserver of social order.
Architectural rules are not mentioned; the ritual relevance is genealogical—affirming gotra (Candramas) and time-period (Svāyambhuva Manvantara), which can frame proper performance of lineage-based rites.