کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8907705 1635127 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Paleoserranus lakamhae gen. et sp. nov., a Paleocene seabass (Perciformes: Serranidae) from Palenque, Chiapas, southeastern Mexico
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Paleoserranus lakamhae gen. et sp. nov., a Paleocene seabass (Perciformes: Serranidae) from Palenque, Chiapas, southeastern Mexico
چکیده انگلیسی
Paleoserranus lakamhae gen. et sp. nov. is here described based on well-preserved fossils from the Paleocene marine sediments of the Tenejapa-Lacandón geological unit, belonging to both Division del Norte and Belisario Domínguez quarries, near Palenque, Chiapas, southeastern Mexico. This species exhibits distinctive characters of the order Perciformes, such as the presence of spines in the dorsal, pelvic, and anal fins, as well as the pelvic and pectoral girdles in contact between them. This fish also has neither procurrent spur nor posterior uroneural, characters that support its place within the family Serranidae. It also has a distinctive combination of characters, including a serrated lacrimal and a toothed ectopterygoid, never recorded before among serranids. Additionally, this fossil fish shares some characters with different species nested within the subfamilies Serraninae, Anthiinae, and Ephinephelinae; these include a predorsal formula of 0/0/0 + 2/1 + 1/1; a preopercle with its ventral edge sinuous and showing a strong antrorse spine; its dorsal fin consists of nine spines and eight to ten soft rays; 13 rays in its pectoral fin; and its rounded caudal fin structured with formula I+8-7+I. Paleoserranus lakamhae gen. et sp. nov. is a Serranidae incertae sedis because it does not fit into any subgroup; however, this Paleocene fish is the earliest fossil record of the family Serranidae. The place of occurrence of this new fossil record suggests that the origin and of the seabasses took place in the Caribbean region of North America.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 83, April 2018, Pages 137-146
نویسندگان
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