Ptenodracon is pronounced te-noh-DRAY-kon.
/ˌtɛ.nəˈdreɪ.kɒn/
Capitals mark the stressed syllable.
This pronunciation is built from the Greek and Latin roots of the name, following the usual English way of saying scientific names. The audio is a synthesized voice reading the name, so it can differ slightly from the respelling.
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Where the name comes from
taenia
/ˈtiː.ni.ə/
Greek, “tainia, band”
IPA from Wiktionary