Vocalizaciones de los ratones &lt;em&gt;Reithrodontomys soderstromi&lt;/em&gt; y &lt;em&gt;Thomasomys paramorum&lt;/em&gt; (Rodentia: Cricetidae) de la provincia de Carchi, Ecuador

Brito, M Jorge; Batallas, R Diego

doi:10.18272/aci.v6i2.173

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…These parameters were analyzed: (1) Dominant frequency: frequency of highest energy determined by the Fourier calculation; (2) Frequency modulation: difference of frequencies between the initial and final points in an acoustic structure; (3) Minimum frequency: frequency of inharmonic partials of least visible value on the spectrum; (4) Maximum frequency: frequency of inharmonic partial of greatest visible value on the spectrum; (5) Number of notes per call: number of distinct acoustic signals recognizable in a call; (6) Call length: time from beginning to end of one call; (7) Interval between calls: time between distinct calls; (8) Duration of the notes; and (9) Intervals between notes. The acoustic parameters are adapted from Francescoli [25], Tokumaru et al [26] and Brito & Batallas [27].…”

Section: Vocalizationsmentioning

confidence: 99%

New species of arboreal rat of the genus Rhipidomys (Cricetidae, Sigmodontinae) from Sangay National Park, Ecuador

Brito

Tinoco

Chávez

et al. 2017

Neotropical Biodiversity

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We describe a new species of climbing rat of the genus Rhipidomys based on cranial and external morphology, morphometrics, and phylogenetic analyses of cytochrome b gene. This taxon was compared with species of Rhipidomys present in Ecuador, principally R. latimanus, which is a closely related species based on molecular analysis, and with several species from Colombia and Peru. The new species is easily distinguished from congeneric species by the relatively small size of its body (average head-body length 123 mm) and its distinctive cranial morphology including: Interorbital region constricted; postorbital crest almost imperceptible in females and evident only slightly in males; braincase wide and round; nasals narrow in their posterior and gradually expand forward; anteromedian flexus is well defined and deep; m3 with hypoflexid large and deep; mesopterygoid fossa extends beyond the third molar and capsular process on mandible well developed, forming an evident projection. The new species is only known from the southeastern portion of Sangay National Park in Ecuador and is therefore likely endemic to the Cordillera Oriental of Ecuador. We also provide natural history and reproductive observations, vocalization analysis, habitat preference, and phylogenetic placement of this species.

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Section: Vocalizationsmentioning

confidence: 99%

New species of arboreal rat of the genus Rhipidomys (Cricetidae, Sigmodontinae) from Sangay National Park, Ecuador

Brito

Tinoco

Chávez

et al. 2017

Neotropical Biodiversity

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Anatomy and mechanisms of vocal production in harvest mice

Riede,

Kobrina,

Pasch

2024

Journal of Experimental Biology

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Characterizing mechanisms of vocal production provides important insight into the ecology of acoustic divergence. In this study, we characterized production mechanisms of two types of vocalizations emitted by western harvest mice (Reithrodontomys megalotis), a species uniquely positioned to inform trait evolution because they are sister taxa to peromyscines (Peromyscus and Onychomys) that use vocal fold vibrations to produce long-distance calls but more ecologically and acoustically similar to baiomyines (Baiomys and Scotinomys) that employ a whistle mechanism. We found that long-distance calls (ca. 10 kHz) were produced by airflow-induced vocal fold vibrations, whereas high-frequency quavers used in close-distance social interactions (ca. 80 kHz) were generated by a whistle mechanism. Both production mechanisms were facilitated by a characteristic laryngeal morphology. Our findings indicate that the use of vocal fold vibrations for long-distance communication is widespread in reithrodontomyines (Onychomys, Peromyscus, Reithrodontomys) despite overlap in frequency content that characterizes baiomyine whistled vocalizations. The results illustrate how different production mechanisms shape acoustic variation in rodents and contribute to ecologically-relevant communication distances.

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Unlocking Andean sigmodontine diversity: five new species ofChilomys(Rodentia: Cricetidae) from the montane forests of Ecuador

Brito

Tinoco

Pinto

et al. 2022

PeerJ

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The Andean cloud forests of Ecuador are home to several endemic mammals. Members of the Thomasomyini rodents are well represented in the Andes, with Thomasomys being the largest genus (47 species) of the subfamily Sigmodontinae. Within this tribe, however, there are genera that have escaped a taxonomic revision, and Chilomys Thomas, 1897, constitutes a paradigmatic example of these “forgotten” Andean cricetids. Described more than a century ago, current knowledge of this externally unmistakable montane rodent is very limited, and doubts persist as to whether or not it is monotypic. After several years of field efforts in Ecuador, a considerable quantity of specimens of Chilomys were collected from various localities representing both Andean chains. Based on an extensive genetic survey of the obtained material, we can demonstrate that what is currently treated as C. instans in Ecuador is a complex comprising at least five new species which are described in this paper. In addition, based on these noteworthy new evidence, we amend the generic diagnosis in detail, adding several key craniodental traits such as incisor procumbency and microdonty. These results indicate that Chilomys probably has a hidden additional diversity in large parts of the Colombian and Peruvian territories, inviting a necessary revision of the entire genus.

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Vocalizaciones de los ratones <em>Reithrodontomys soderstromi</em> y <em>Thomasomys paramorum</em> (Rodentia: Cricetidae) de la provincia de Carchi, Ecuador

Cited by 3 publications

References 19 publications

New species of arboreal rat of the genus Rhipidomys (Cricetidae, Sigmodontinae) from Sangay National Park, Ecuador

New species of arboreal rat of the genus Rhipidomys (Cricetidae, Sigmodontinae) from Sangay National Park, Ecuador

Anatomy and mechanisms of vocal production in harvest mice

Unlocking Andean sigmodontine diversity: five new species ofChilomys(Rodentia: Cricetidae) from the montane forests of Ecuador

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