Project 728: R.H. Pine, R.M. Timm, M. Weksler. 2012. A newly recognized clade of Trans-Andean Oryzomyini (Rodentia: Cricetidae), with description of a new genus. Journal of Mammalogy. 93 (3):851-870.
Specimen: Tanyuromys aphrastus (KU/Mammalogy:161003)
View: Skull - dorsal

Abstract

We expand upon recent studies on relationships within the Oryzomyini, in particular, those involving taxa currently assigned to the genus Sigmodontomys. In recent years, Sigmodontomys has been treated as including 2 species, alfari (J. A. Allen, 1897) and aphrastus (Harris, 1932), but throughout their complicated taxonomic history both species also have been placed in the genus Oryzomys, and alfari independently in Nectomys. Using morphological (98 external, cranial, dental, and postcranial) and molecular (nuclear interphotoreceptor retinoid-binding protein gene and mitochondrial cytochrome-b and ribosomal 12S RNA genes) characters, we infer the phylogenetic position of these 2 species within Oryzomyini. We document that alfari and aphrastus do not form a monophyletic group. Sigmodontomys alfari is most closely related to Melanomys, and aphrastus is either the sister to that clade, or to the extinct Caribbean genus Megalomys. Thus, aphrastus is best regarded as representing a new genus, which is described and named herein. This new genus falls within the Sigmodontomys-Melanomys-Aegialomys-Nesoryzomys clade, which forms a monophyletic group of mainly southern Central American and northern South American taxa primarily restricted to lowland to midelevation montane trans-Andean habitats and possessing a marked ability to cross expanses of salt water. The new genus occurs at middle elevations from north-central Costa Rica to northwestern Ecuador and along with some populations of Aegialomys and Melanomys occupies the highest elevations for members of this group.


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Article DOI: https://doi.org/10.1644/11-MAMM-A-012.1

Project DOI: 10.7934/P728, http://dx.doi.org/10.7934/P728
This project containsMatrices
  • 9 Media
  • 1 Matrix
  • 1 Document
  • 59 Taxa
  • 3 Specimens
  • 98 Characters
Total size of project's media files: 534.36k

Download Project SDD File
Total scored cells: 5217
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 98
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 238
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:98/0
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MorphoBank Project 728

    Authors' Institutions

    • Universidade Federal do Rio De Janeiro (UFRJ)

    • University of Kansas

    • Museu Nacional do Rio de Janeiro

    • Field Museum of Natural History



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
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    Marcelo Weksler
    Project Administrator
    Last logged in 10/09/12
    593998005217
    (5217, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1646' (59 Taxa)

    taxon unscored
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    [1] Nyctomys sumichrasti
    Last Modified in 12/05/13
    3959500001
    [2] Peromyscus maniculatus
    Last Modified in 12/05/13
    10888800001
    [3] Delomys sublineatus
    Last Modified in 12/05/13
    13858500001
    [4] Thomasomys baeops
    Last Modified in 12/05/13
    3979500001
    [5] Wiedomys pyrrhorhinos
    Last Modified in 12/05/13
    12878600001
    [6] Aegialomys xanthaeolus
    Last Modified in 12/05/13
    9948900001
    [7] Amphinectomys savamis
    Last Modified in 12/05/13
    67313100001
    [8] Cerradomys subflavus
    Last Modified in 12/05/13
    8959000001
    [9] Eremoryzomys polius
    Last Modified in 12/05/13
    22767600001
    [10] Euryoryzomys lamia
    Last Modified in 12/05/13
    22777600001
    [11] Euryoryzomys macconnelli
    Last Modified in 12/05/13
    8929000001
    [12] Euryoryzomys russatus
    Last Modified in 12/05/13
    14858400001
    [13] Handleyomys alfaroi
    Last Modified in 12/05/13
    7949100001
    [14] Handleyomys chapmani
    Last Modified in 12/05/13
    10908800001
    [15] Handleyomys intectus
    Last Modified in 12/05/13
    16848200001
    [16] Handleyomys rostratus
    Last Modified in 12/05/13
    1999700001
    [17] Holochilus brasiliensis
    Last Modified in 12/05/13
    1989700001
    [18] Hylaeamys megacephalus
    Last Modified in 12/05/13
    01009800001
    [19] Hylaeamys yunganus
    Last Modified in 12/05/13
    11888700001
    [20] Lundomys molitor
    Last Modified in 12/05/13
    9908900001
    [21] Melanomys columbianus
    Last Modified in 12/05/13
    11039700001
    [22] Microryzomys minutus
    Last Modified in 12/05/13
    3959500001
    [23] Mindomys hammondi
    Last Modified in 12/05/13
    22777600001
    [24] Neacomys minutus
    Last Modified in 12/05/13
    22767600001
    [25] Neacomys musseri
    Last Modified in 12/05/13
    16828200001
    [26] Neacomys spinosus
    Last Modified in 12/05/13
    1989700001
    [27] Nectomys apicalis
    Last Modified in 12/05/13
    15838300001
    [28] Nectomys squamipes
    Last Modified in 12/05/13
    5949300001
    [29] Nephelomys albigularis
    Last Modified in 12/05/13
    9928900001
    [30] Nephelomys levipes
    Last Modified in 12/05/13
    10908800001
    [31] Nesoryzomys narboroughi
    Last Modified in 12/05/13
    5939300001
    [32] Nesoryzomys swarthi
    Last Modified in 12/05/13
    37616100001
    [33] Oecomys bicolor
    Last Modified in 12/05/13
    8939000001
    [34] Oecomys catherinae
    Last Modified in 12/05/13
    23757500001
    [35] Oecomys concolor
    Last Modified in 12/05/13
    1999700001
    [36] Oecomys mamorae
    Last Modified in 12/05/13
    10898800001
    [37] Oecomys trinitatis
    Last Modified in 12/05/13
    12898600001
    [38] Oligoryzomys flavescens
    Last Modified in 12/05/13
    11878700001
    [39] Oligoryzomys fornesi
    Last Modified in 12/05/13
    21777700001
    [40] Oligoryzomys fulvescens
    Last Modified in 12/05/13
    1979700001
    [41] Oligoryzomys nigripes
    Last Modified in 12/05/13
    8919000001
    [42] Oligoryzomys stramineus
    Last Modified in 12/05/13
    23757500001
    [43] Oreoryzomys balneator
    Last Modified in 12/05/13
    16828200001
    [44] Oryzomys couesi
    Last Modified in 12/05/13
    10888800001
    [45] Oryzomys palustris
    Last Modified in 12/05/13
    01009800001
    [46] Pseudoryzomys simplex
    Last Modified in 12/05/13
    9908900001
    [47] Scolomys ucayalensis
    Last Modified in 12/05/13
    9898900001
    [48] Sigmodontomys alfari
    Last Modified in 12/05/13
    21009600001
    [49] Tanyuromys aphrastus
    Last Modified in 12/05/13
    17848100001
    [50] Sooretamys angouya
    Last Modified in 12/05/13
    2999600001
    [51] Transandinomys talamancae
    Last Modified in 12/05/13
    11009700001
    [52] Zygodontomys brevicauda
    Last Modified in 12/05/13
    11029700001
    [53] Zygodontomys cherriei
    Last Modified in 12/05/13
    11009700001
    [54] Drymoreomys albimaculatus
    Last Modified in 12/05/13
    21009600001
    [55] Megalomys desmarestii
    Last Modified in 12/05/13
    18808000001
    [56] Megalomys luciae
    Last Modified in 12/05/13
    28707000001
    [57] Rhipidomys nitela
    Last Modified in 12/05/13
    15838300001
    [58] Melanomys chrysomelas
    Last Modified in 12/05/13
    21867700001
    [59] Melanomys caliginosus
    Last Modified in 12/05/13
    21039600001


    Project views

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    Total project views34283
    Project overview2957
    Media views9722Media search (4366 views); M107731 (683 views); M107735 (563 views); M107734 (581 views); M107737 (576 views); M107732 (598 views); M107738 (574 views); M107733 (608 views); M107736 (546 views); M107739 (627 views);
    Matrix views2104Matrix landing page (1828 views); Tanyuromys morphological matrix (276 views);
    Taxon list11677
    Specimen list3122
    Bibliography832
    Documents list1490
    Views for media list2379




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project280
    Media downloads15M107731 (1 download); M (1 download); M107734 (5 downloads); M107737 (6 downloads); M107735 (1 download); M107738 (1 download);
    Matrix downloads20Tanyuromys morphological matrix (20 downloads);
    Document downloads5complete matrix, including morphological and molecular characters, used in Tanyuromys analyses. (5 downloads);
    Project downloads240