Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru
The modern pygmy and dwarf sperm whales (Physeteroidea, Kogiidae) are remnants of a highly diverse group, which flourished in the Miocene oceans. Unlike their modern suction-feeding, deep-diving relatives, the past diversity of this family includes animals with disparate ecological habits. Here, we...
Published in: | Journal of Vertebrate Paleontology |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
The Society of Vertebrate Paleontology
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1080/02724634.2019.1728538 |
id |
ftbioone:10.1080/02724634.2019.1728538 |
---|---|
record_format |
openpolar |
spelling |
ftbioone:10.1080/02724634.2019.1728538 2024-06-02T08:14:54+00:00 Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina world 2020-07-14 text/HTML https://doi.org/10.1080/02724634.2019.1728538 en eng The Society of Vertebrate Paleontology doi:10.1080/02724634.2019.1728538 All rights reserved. https://doi.org/10.1080/02724634.2019.1728538 Text 2020 ftbioone https://doi.org/10.1080/02724634.2019.1728538 2024-05-07T00:51:19Z The modern pygmy and dwarf sperm whales (Physeteroidea, Kogiidae) are remnants of a highly diverse group, which flourished in the Miocene oceans. Unlike their modern suction-feeding, deep-diving relatives, the past diversity of this family includes animals with disparate ecological habits. Here, we describe Scaphokogia totajpe, sp. nov., a new species of kogiid based on a well-preserved skull from the upper Miocene strata of the Pisco Formation, Peru. A phylogenetic analysis places S. totajpe as sister taxon of S. cochlearis and divides Kogiidae into two clades: the first including both species of Scaphokogia and the second including Kogia, Koristocetus, Praekogia, and Nanokogia. Similar to S. cochlearis, S. totajpe has a tubular rostrum with a hypertrophied mesorostral canal, a large supracranial basin, and a leftward deviated facial sagittal crest, but it differs by possessing a proportionately shorter rostrum, a reduced projection of the lacrimojugal between the frontal and the maxilla, and a flat occipital shield. The cranial morphology of Scaphokogia indicates that the extent of the nasal complex was greater than in modern kogiids. Furthermore, the overall rostrum shape and the reconstructed muscle insertion sites indicate that Scaphokogia retained some plesiomorphic features related to a more generalist ecology. Inclusion of S. totajpe into the context of the Pisco Formation indicates that during the late Miocene, the Peruvian coastal system was a hot spot for the diversification of physeteroids, with at least four species coexisting. Finally, Scaphokogia totajpe highlights a late Miocene diversity peak for sperm whales in the global oceans, before the Pliocene odontocete turnover. Text Sperm whale BioOne Online Journals Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) Journal of Vertebrate Paleontology 39 6 e1728538 |
institution |
Open Polar |
collection |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
description |
The modern pygmy and dwarf sperm whales (Physeteroidea, Kogiidae) are remnants of a highly diverse group, which flourished in the Miocene oceans. Unlike their modern suction-feeding, deep-diving relatives, the past diversity of this family includes animals with disparate ecological habits. Here, we describe Scaphokogia totajpe, sp. nov., a new species of kogiid based on a well-preserved skull from the upper Miocene strata of the Pisco Formation, Peru. A phylogenetic analysis places S. totajpe as sister taxon of S. cochlearis and divides Kogiidae into two clades: the first including both species of Scaphokogia and the second including Kogia, Koristocetus, Praekogia, and Nanokogia. Similar to S. cochlearis, S. totajpe has a tubular rostrum with a hypertrophied mesorostral canal, a large supracranial basin, and a leftward deviated facial sagittal crest, but it differs by possessing a proportionately shorter rostrum, a reduced projection of the lacrimojugal between the frontal and the maxilla, and a flat occipital shield. The cranial morphology of Scaphokogia indicates that the extent of the nasal complex was greater than in modern kogiids. Furthermore, the overall rostrum shape and the reconstructed muscle insertion sites indicate that Scaphokogia retained some plesiomorphic features related to a more generalist ecology. Inclusion of S. totajpe into the context of the Pisco Formation indicates that during the late Miocene, the Peruvian coastal system was a hot spot for the diversification of physeteroids, with at least four species coexisting. Finally, Scaphokogia totajpe highlights a late Miocene diversity peak for sperm whales in the global oceans, before the Pliocene odontocete turnover. |
author2 |
Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina |
format |
Text |
author |
Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina |
spellingShingle |
Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
author_facet |
Aldo Benites-Palomino Jorge Vélez-Juarbe Rodolfo Salas-Gismondi Mario Urbina |
author_sort |
Aldo Benites-Palomino |
title |
Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
title_short |
Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
title_full |
Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
title_fullStr |
Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
title_full_unstemmed |
Scaphokogia totajpe, sp. nov., a New Bulky-Faced Pygmy Sperm Whale (Kogiidae) from the Late Miocene of Peru |
title_sort |
scaphokogia totajpe, sp. nov., a new bulky-faced pygmy sperm whale (kogiidae) from the late miocene of peru |
publisher |
The Society of Vertebrate Paleontology |
publishDate |
2020 |
url |
https://doi.org/10.1080/02724634.2019.1728538 |
op_coverage |
world |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
geographic |
Pisco |
geographic_facet |
Pisco |
genre |
Sperm whale |
genre_facet |
Sperm whale |
op_source |
https://doi.org/10.1080/02724634.2019.1728538 |
op_relation |
doi:10.1080/02724634.2019.1728538 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/02724634.2019.1728538 |
container_title |
Journal of Vertebrate Paleontology |
container_volume |
39 |
container_issue |
6 |
container_start_page |
e1728538 |
_version_ |
1800738901631959040 |