O papel dos dentes modificados em mordidas prolongadas de Hierophis viridiflavus (Serpentes: Colubridae)
DOI:
https://doi.org/10.11606/issn.2316-9079.v22i2p121-130Palavras-chave:
Glândula de Duvernoy, Opistoglifodonte, Presas modificadas, SerpentesResumo
A análise dos ossos maxilares, palatinos, pterigóides e dentários de Hierophis viridiflavus carbonarius revelou a presença de sulcos e cristas nos dentes dos quatro ossos dentíferos. Dentes posteriores ampliados e modificados foram encontrados nos maxilares posteriores, separados por diástemas alveolares e alinhados de forma diferente dos dentes maxilares anteriores. Tanto nos espécimes vivos como nos dissecados, a glândula de Duvernoy, associada à produção de toxinas, circunda os dentes maxilares posteriores, que liberam as secreções produzidas pela glândula. Essas características, além da inflição de mordidas prolongadas, facilitam a dominação da presa. A morfologia do arco palatomaxilar coloca H. viridiflavus no grupo dos colubróides opistóglifos, cujas presas modificadas facilitam a inoculação de secreções, consideradas uma “forma primitiva de veneno”. Outras espécies de grandes colubróides simpátricos também foram examinadas, e algumas estruturas análogas foram observadas.
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