Monodelphis maraxina, THOMAS, 1923

Pavan, Silvia Eliza, Rossi, Rogerio Vieira & Schneider, Horacio, 2012, Species diversity in the Monodelphis brevicaudata complex (Didelphimorphia: Didelphidae) inferred from molecular and morphological data, with the description of a new species, Zoological Journal of the Linnean Society 165 (1), pp. 190-223: 210-211

publication ID

http://doi.org/ 10.1111/j.1096-3642.2011.00791.x

DOI

http://doi.org/10.5281/zenodo.5479834

persistent identifier

http://treatment.plazi.org/id/3C758792-FFFF-FFB7-DFFB-EF08994DFB4C

treatment provided by

Marcus

scientific name

Monodelphis maraxina
status

 

MONODELPHIS MARAXINA THOMAS, 1923  

Monodelphis maraxina Thomas, 1923   was described for Marajó Island, in eastern state of Pará. Thomas (1923) suggested that M. maraxina   is closely related to M. domestica   . Subsequent authors agreed with him, some of which even regarded M. maraxina   as a synonym of M. domestica   (e.g. Cabrera, 1958; Emmons & Feer, 1990, 1997). However, Pine (1980) suggested that a relationship of M. maraxina   with members of the M. brevicaudata   group would be more reasonable on zoogeographical grounds. He also noted that the relative hairlessness of the tail and the buffy coloration of body sides are conditions shared with specimens of M. brevicaudata   from the east bank of the Tapajós river (= M. glirina   ). Recently, based on Pine’s (1980) view, Solari (2010) included M. maraxina   in the M. brevicaudata   group.

Our morphological analysis of the holotype of M. maraxina   (BMNH 12.5.11.13) through photographs led us to conclude that this form undoubtedly belongs to the M. brevicaudata   complex. The colour pattern observed in specimens of M. glirina   from the east bank of the Xingu river shows a striking concordance with the original description of M. maraxina   , and our analysis confirmed that these two forms have highly similar skin and skulls. Similarities between the faunas of the Marajó Island and the adjacent area at the eastern margin of the Xingu river are expected, as indicated by other vertebrate groups (e.g. Nascimento et al., 1991; Avila-Pires, 1995; Fernandes, Cardoso da Silva & Silva Jr, 1995; Ron, 2000). Furthermore, our recent field work at Marajó uncovered specimens of another species of the M. brevicaudata   complex that is also present on the east bank of the Xingu river ( M. touan   ), confirming that these areas are able to share species of short-tailed opossum.

Given the substantial morphological similarity between the holotype of M. maraxina   and specimens of M. glirina   from east of the Xingu river, and the evidence that these areas are able to share species of short-tailed opossum, we argue that M. maraxina   may represent a geographical variant of M. glirina   . However, as we have not performed molecular and direct morphological analyses of specimens regarded as M. maraxina   , and because our general analyses are not conclusive with respect to M. glirina   , which may represent a complex of species rather than an unique species, more accurate analyses are needed to answer this question. At this time, we maintain M. maraxina   as a valid species included in the M. brevicaudata   complex.

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Didelphimorphia

Family

Didelphidae

Genus

Monodelphis

Loc

Monodelphis maraxina

Pavan, Silvia Eliza, Rossi, Rogerio Vieira & Schneider, Horacio 2012
2012
Loc

Monodelphis maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. maraxina

Thomas 1923
1923
Loc

M. brevicaudata

Erxleben 1777
1777
Loc

M. brevicaudata

Erxleben 1777
1777
Loc

M. brevicaudata

Erxleben 1777
1777
Loc

M. brevicaudata

Erxleben 1777
1777
Loc

M. brevicaudata

Erxleben 1777
1777