_Phyllostoma planirostre_ Spix, Simiarum et vespertilionum
Brasiliensium, p. 66, 1823, type from suburbs of Bahia,
Brazil.
_Artibeus planirostris_, Dobson, Catal. Chiroptera, British
Mus., p. 515 (part), 1878.
_Range._--Probably southwestern part of state.
_Specimen examined_, 1: no. 945b B. Villa R., field no., I.B., El
Guayabo, 34 kms. S Uruapan.
_Measurements._--Head and body, 89.0 mm.; total length of skull to
front of upper canines, 28.0; mastoid breadth, 15.5; zygomatic
breadth, 17.8; maxillary width across first upper molars, 13.2;
breadth across cingula of upper canines, 7.9; greatest length of one
ramus of lower jaw including anteriormost incisor tooth, 19.4; length
of upper tooth-row, anterior border of canine to posterior border of
M2, 10.4; length of lancet (nose-leaf), 9.0; width of lancet, 6.5;
width of horseshoe, 9.0; forearm, 57.3; 3rd metacarpal, 52.6; 1st
(basal) phalanx, 16.0; 2nd (middle) phalanx, 26.7; 3rd (distal)
phalanx, 18.5; 4th metacarpal, 50.7; 1st (basal) phalanx, 14; 2nd
phalanx, 18.8; 5th metacarpal, 54; 1st (basal) phalanx, 11.2; 2nd
phalanx, 13.2; lower leg, 22.9; foot with claws, 15.2; calcar, 6.5.
_Remarks._--Our single specimen, a female, was caught on July 28,
1945, by my (B. Villa's) father, Andres Villa, in a natural cave,
roosting with the individuals of _Glossophaga s. leachii_. The
northernmost locality in MA(C)xico from which _A. p. planirostris_
previously has been recorded is El Papayo, in the state of Guerrero
(Andersen, 1908:238), approximately 225 kilometers to the southward.
_A. p. planirostris_ and _Artibeus jamaicensis_ closely resemble each
other but _A. planirostris_ may be recognized by the presence of a
minute M3 which is absent in _A. jamaicensis_. Specimen no. 945b has
M3 present on both sides of the upper jaw. From _Artibeus hirsutus_,
known from La Salada, MichoacAin, approximately 40 miles north and
slightly to the east of El Guayabo, our specimen differs in the
apparently hairless tibia and interfemoral membrane. The measurements,
of no. 945b, recorded above, if compared with those given by Andersen
(1908:246) are seen mostly to fall within the range recorded for _A.
hirsutus_. Where measurements are outside this range, they fall within
the range of those of the larger _A. p. planirostris_. We recognize
that the Mexican species of _Artibeus_ are not well understood, at
least by us.
=Artibeus hirsutus= K. Andersen