Marmosops (Sciophanes) pinheiroi ( Pine, 1981 )

Ferreira, Claudilívia, Oliveira, Ana Cristina Mendes De, Lima-Silva, Luan Gabriel & Rossi, Rogério Vieira, 2020, Taxonomic review of the slender mouse opossums of the “ Parvidens ” group from Brazil (Didelphimorphia: Didelphidae: Marmosops), with description of a new species, Zootaxa 4890 (2), pp. 201-233: 222-225

publication ID

https://doi.org/10.11646/zootaxa.4890.2.3

publication LSID

lsid:zoobank.org:pub:54F20D85-7110-465D-914C-26FA34847A02

DOI

http://doi.org/10.5281/zenodo.4328166

persistent identifier

http://treatment.plazi.org/id/03C3945D-FFD5-FFCD-FF04-8D08FEFAFDCF

treatment provided by

Plazi

scientific name

Marmosops (Sciophanes) pinheiroi ( Pine, 1981 )
status

 

Marmosops (Sciophanes) pinheiroi ( Pine, 1981)  

Marmosa parvidens pinheiroi Pine, 1981: 61   .

Marmosops pinheiroi: Voss et al. 2001: 49   (part); name combination.

M [armosops]. pirenhoi Flores, 2004: 133 (part); incorrect spelling of Marmosops pinheiroi ( Pine, 1981)   .

[ Marmosops Schiophanes   ] pinheiroi: Díaz-Nieto et al. 2016: 928   ; first use of the current name combination.

Holotype. USNM 461459 (original numbers T-391 and L5049) consists of the skin and skull of an adult female collected on 08 May, 1969, by personnel of the Institute Evandro Chagas.

Type locality. Serra do Navio (0º59’N, 52º03’W), left bank of the Rio Amapari, state of Amapá, Brazil GoogleMaps   .

Geographic distribution. It occurs in the Guiana Shield and east of the Negro River, from southeastern Ven-ezuela to the Amazon River, through Guyana, Suriname, French Guiana and the states of Amapá, Roraima and Pará in Brazil ( Figure 5 View FIGURE 5 ).

Amended diagnosis. Dorsal coloration grayish-brown; tail length (LT: 120–167 mm) much longer than head and body length ( HBL: 75–115 mm); ventral coloration ranging from white to cream, with wide lateral bands of gray-based and white-tipped hairs, which usually join on the throat and do not extend to the inner surface of the hind limbs; lacrimal foramina exposed in lateral view; supraoccipital with slightly convex shape in dorsal view; upper third molar (M3) with anterior and posterior portions of the stylar shelf projected labially in the same proportion (in occlusal view); upper molars with preprotocrista and anterolabial cingulum seperated, not forming a continuous shelf along the anterior margin of the tooth crown; metaconule of the upper molars slightly developed; and talonid of the lower fourth molar (m4) usually bicuspid.

Morphological description. Marmosops pinheiroi   (s.s) has a head and body size of 75–115 mm and longer tail (LT: 120–167 mm; Tables 4 and 5); dorsal hairs 6–8 mm long; dorsal fur smooth, grayish-brown, being slightly lighter laterally; rostrum lighter than the top of the head, presenting light brown coloration, with some pale red and gray hairs; mask around the eyes blackish, with conspicuous posterior portion; cheeks with a greater amount of white hairs, but gray-based and white-tipped hairs also present; hands covered dorsally by whitish hairs; tail bicolor, generally grayish brown dorsally (73.8%, n=42); tail scales arranged in a spiral, each with three hairs inserted in the posterior margin; the central hair of the triplet clearly thicker and more pigmented than the lateral ones; venter varying from cream to white, with wide lateral bands of gray-based and white-tipped hairs (except in MPEG 40017, 40027, 40406, 40407, which have slightly narrower lateral bands), usually joining on the throat (74%, n=42) and not extending to the inner surface of the hind limbs (64.3%, n=42); hands with lateral spoon shaped carpal tubercle in adult males.

Craniodentally, Marmosops pinheiroi   (s.s.) exhibits a zygomatic process of the squamosal widely overlapped dorsally by the jugal; lacrimal foramina exposed in lateral view (except in MPEG 39972 and 40025, in which foramina are not exposed); supraorbital margin slightly rounded with non-prominent crest; long nasal bones (ex-tending slightly behind the lacrimal) and wider posteriorly than anteriorly (except in MPEG 2277; MNRJ 70256, 70359, 70362 70730, 70798, whose nasal bones are similarly wide along all extension); supraoccipital with slightly convex shape in dorsal view; paraoccipital process generally long and narrow (77.7%, n=36); tympanic process of alisphenoid with ventral surface usually oval (75.7% n=37); cochlear fenestrae exposed in ventral view (except in MNRJ 70256, 70730); palatine fenestrae absent, but diminutive perforations in the palatine and/or maxillary bones may be present ( MPEG 40002, 40005, 40013, 40017, 40406; MNRJ 70256); upper canines (C1) with anterior and posterior accessory cusps in males and females; upper third molar (M3) with anterior and posterior portions of the stylar shelf projected labially in the same proportion; upper molars with preprotocrista and anterolabial cingulum separated, not forming a continuous shelf along the anterior margin of the tooth crown; metaconule of the upper molars; Figures 7B and C View FIGURE 7 ) undeveloped; lower canine (c1) premolariform, with posterior accessory cusp, subequal (63%, n=35) or slightly higher (37%, n=35) to the first lower premolar (p1); paraconid of the second lower molar (m2) higher than the entoconid of the lower first molar (m1); and talonid of the lower fourth molar (m4) usually bicuspid (61%, n=38).

Geographic variation. We did not observe any geographic variation among samples of M. pinheiroi   examined in this report.

Comparisons with M. parvidens   and other species of the “Parvidens” group ( Table 6). Comparisons between M. pinheiroi   (s.s.) and M. marina   are provided above. Externally, M. pinheiroi   (s.s.) is distinguished from M. parvidens   and M. woodalli   by exhibiting grayish-brown dorsal color ( Figure 4C View FIGURE 4 ), versus slightly reddish brown in M. parvidens   ( Figure 4B View FIGURE 4 ) and usually dark brown in M. woodalli   ( Figure 4D View FIGURE 4 ); ventral coloration varying from cream to white ( Figure 4C View FIGURE 4 ), versus cream in M. parvidens   ( Figure 4B View FIGURE 4 ) and white in M. woodalli   ( Figures 4D View FIGURE 4 ); lateral bands of gray-based hairs wide on the venter, usually joining on the throat and not extending to the inner surface of the hind limbs ( Figure 4C View FIGURE 4 ), versus usually absent in M. parvidens   , whose venter is covered with a continuous band of cream colored hairs extending along the inner surface of the anterior and posterior limbs ( Figure 4B View FIGURE 4 ), and narrow and irregularly arranged, joining or not on the throat and/or mid-chest in M. woodalli   ( Figure 4D View FIGURE 4 ). Is also differs from M. parvidens   by exhibiting conspicuous blackish facial mask around the eyes that extends posteriorly (versus usually inconspicuous; Table 6). Finally, M. pinheiroi   (s.s) has, on average, longer feet ( Tables 4 and 5) and shorter dorsal fur than M. woodalli   (6.9 mm in the former versus 7.6 mm in the latter species).

Craniodentally, M. pinheiroi   (s.s.) differs from M. parvidens   and M. woodalli   by exhibiting lacrimal foramina exposed (versus variably exposed) in lateral view; tympanic process of the alisphenoid with ventral surface usually oval, versus usually globose in M. parvidens   and variable in M. woodalli   ; and talonid of the lower fourth molar (m4) usually bicuspid (versus usually tricuspid). It also differs from M. parvidens   by exhibiting preprotocrista and anterolabial cingulum separated, not forming a continuous shelf on the anterior margin of crown of the upper molars (versus attached, forming a continuous shelf on the anterior margin of crown of the upper molars; Figures 7B and C View FIGURE 7 ); and small accessory cusp between the metaconid and the entoconid of lower molars absent ( Figure 8 View FIGURE 8 A-B). Marmosops pinheiroi   (s.s.) can also be discriminated from Marmosops woodalli   by exhibiting a slightly convex supraoccipital (versus rounded and markedly convex; Figures 9 View FIGURE 9 A-B); anterior and posterior stylar portions of the M3 projected labially in the same proportion (versus posterior portion more projected labially than anterior portion; Figures 6 View FIGURE 6 A-B).

Habitats and sympatry. Marmosops pinheiroi   (s.s.) extends along Humid Forests of Uatumã-Trombetas and Savannas of Guiana ecoregions (sensu Olson et al. 2001). The species has been recorded in sympatry with M. parvidens in Floresta Estadual de Faro   , on the left bank of the Nhamundá River, state of Pará, Brazil; in Floresta Estadual de Trombetas, Óbidos, Pará, Brazil; in Oriximiná, Pará, Brazil ( Figure 5 View FIGURE 5 ); in Paracou, French Guiana ( Voss et al. 2001; Voss et al. 2013; Díaz-Nieto & Voss 2016); and in Demerara-Mahaica, French Guiana ( Voss et al. 2013; Díaz-Nieto & Voss 2016).

Natural history data. Mammary formula 4–1–4 = 9. Lactating females were recorded in March and April in Parque Nacional Viruá, state of Roraima, Brazil.

Specimens examined (n=69). BRAZIL - Amapá: Macapá, rigth bank of Rio Amapari , 0°2’N, 51°4’W, 1 M ( MPEG 2277 View Materials ) GoogleMaps   ; Serra do Navio, Rio Amapari , 0º54’3”N, 52º0’14”W, 1 M, 1 F ( MPEG 15255 View Materials , 15256 View Materials ) GoogleMaps   ; Serra do Navio, Rio Amapari , 0°59’N, 52°03’W, 1 F ( USNM 461459 View Materials , photograph of the holotype) GoogleMaps   . Pará: Floresta Estadual Faro (Flota Faro), left bank of Rio Nhamundá , 1°16’44”S, 58°2’24”W, 1 F ( MPEG 39972 View Materials ) GoogleMaps   ; Parque Estadual de Monte Alegre, Monte Alegre , 2°3’6”S, 54°10’58”W, 1 M ( MPEG 38171 View Materials ) GoogleMaps   ; Óbidos, Flota Trombetas , 0°58’0”S, 55°30’60”W, 19 M, 6 F, 2? ( MPEG 40002 View Materials , 40005 View Materials , 40012 View Materials , 40013 View Materials , 40016-40019 View Materials , 40023-40027 View Materials , 40030 View Materials , 40032 View Materials , 40033 View Materials , 40037 View Materials , 40402 View Materials , 40405-40409 View Materials , 40410-40412 View Materials ; MPEG: CN063) GoogleMaps   ; Oriximiná , 1°45’S, 55°51’W, 1 M, 1 F ( MPEG 39805 View Materials , 39806 View Materials ) GoogleMaps   . Roraima: Caracaraí, Parque Nacional Viruá , 01º15’N, 61º9’W, 23 M, 10 F, 2? ( MNRJ 70256 View Materials , 70359 View Materials , 70362 View Materials , 70389 View Materials , 70396 View Materials , 70397 View Materials , 70410 View Materials , 70412 View Materials , 70421 View Materials , 70422 View Materials , 70487 View Materials , 70730 View Materials , 70738 View Materials , 70745 View Materials , 70746 View Materials , 70753 View Materials , 70754 View Materials , 70757 View Materials , 70760 View Materials , 70762 View Materials , 70763 View Materials , 70765 View Materials , 70772 View Materials , 70793-70795 View Materials , 70798 View Materials , 70802 View Materials , 70819 View Materials , 70833 View Materials , 70856 View Materials , 70923 View Materials , 70950 View Materials , 70953 View Materials ) GoogleMaps   .

MPEG

Museu Paraense Emilio Goeldi

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Didelphimorphia

Family

Didelphidae

Genus

Marmosops

Loc

Marmosops (Sciophanes) pinheiroi ( Pine, 1981 )

Ferreira, Claudilívia, Oliveira, Ana Cristina Mendes De, Lima-Silva, Luan Gabriel & Rossi, Rogério Vieira 2020
2020
Loc

Marmosops pinheiroi:

Voss, R. S. & Lunde, D. P. & Simmons, N. B. 2001: 49
2001
Loc

Marmosa parvidens pinheiroi

Pine, R. H. 1981: 61
1981