• Tidak ada hasil yang ditemukan

Proceedings of the Biological Society of Washington

N/A
N/A
Protected

Academic year: 2023

Membagikan "Proceedings of the Biological Society of Washington"

Copied!
5
0
0

Teks penuh

(1)

VOL. XIII, PP. 33-37

MAY

29, 1899

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

TWO NEW GLOSSOPHAGINK BATS FROM THE WEST INDIES.*

BY GERRIT

S.

MILLER,

JR.

Examination

of

material

in

the United

States

National Mu

seum proves

that there are at least three species of

the

Glos-

sophagine genus

Phyllonycterisin

addition

tothe slightly

known

P.

poeyi One

of these, P. sezekorni

Gundlach,f

is

confined

to

Cuba, the second occurs

in

the Bahamas, and the

thirdis

thus

far

known from Puerto Rico

only.J

To the kindness

ofDr.J.

A

.

Allen

I

owe

the

opportunity

of

examining two

skulls of Phyllo- nycteris sezekorni.

The

three species

may be distinguished by the following synopsis

:

Zygomatic arch incomplete; braincasehigh but forming

no

angle with dorsal outline of rostrum; rim of anterior nares thick,notflaring; nodistinctlachrymalswellings;

depthofmandible aboutone-sixth length;

crown

offirst

lower molar only slightly longer than that of firstpre-

molar; colorlightyellowish

brown

P. sezekorni.

*Published

by

permissionof Secretary of the SmithsonianInstitution.

fMonatsber. K. Preuss. Akad. Wiss., Berlin(1860), p.818, December, 1860.

\Sincethis paper has beenin press, Mr. D. G. Elliot has sent

me

for examinationthePhyllonycteris

from San

Cristobal,Santo

Domingo, which

he recorded in 1896 as P, poeyi (Field

Columbian Museum

Publication 11,Zoological Series, I, No.3, p. 82,

May,

1896).

The

tingleskin repre sentsa species closelyrelated to P. bombifrons of Puerto Rico,but prob.

ablydistinct. Intheabsenceofsatisfactorymaterialit

would

beuseless toattemptto definethe form.

9 BIOL. Soc. WASH., VOL. XIII,1899 (:)

(2)

34 Miller New Glossophagine Bats

front (lie IIV*/ 7m//Vx.

Zygomatic arch complete; braincaseforming

an

anglewith dorsal outline ofrostrum; rimof anterior nares variable;

lachrymal region distinctlyswollen; depth of

mandible

about one-seventh length;

crown

of first lower molar nearly twiceaslongasthatoffirstpremolar; color vari able.

Braincaserisingabove planeofrostrumatangle ofabout 12 ; rim of anterior nares thick, not flaring; teeth large; anterior border of tragus entire; back light

clay color -.P. planifrons.

Braincaserisingabove planeofrostrumatangle ofabout 30 ; rim of anterior nares thin, distinctly flaring;

teeth small; anterior border of tragus with several

fleshyprojectionsneartip; back dark

brown

P. bomblfrons.

Phyllonycteris

planifrons sp. nov.

Type, adult

J

1 (in alcohol),No.62517, UnitedStatesNational

Museum,

collectedatNassau,

New

Providence,

Bahamas, March

18, 1886,

by James

E. Benedict.

Generalcharacters. See synopsis.

Ears.

The

ears are moderately long; laid forward they reach about three-fourths of the distance

from

eye to nostril. Anterior border of conchstrongly

convex

immediately above base, then nearly straight to narrowly

rounded

offtip. Posteriorborderfaintlyconcave immediately belowtip, convex through lowerhalf.

The

posterior borderterminates abruptly close in front of meatus,

and

almost directly below anterior base. Sixorseventransverse ridges

on

inner side ofconch nearposte rior border.

A

small but conspicuous wart

on

cheek in front of lower baseofear. Anterior borderof tragus

much

thickened, nearly straight, thoughslightly

convex

nearmiddle

and

slightlyconcavebelowtip. Tip pointed. Posterior bordetwithfour jaggedprojections,of

which

the

two

lowerarelargest

and

the

two

upperoccasionallyobsolete.

Muzzle

and

chin.

Main

portion of noseleafoval,considerably broader than high, illdefinedover upperlip, thefreeedgefinely crenulate. At middleofupperpart offreeedgeisa well defineduprightprojection,the heightof

which

abovegeneral outline of oval isabout equal to distance between inner bordersofnostrils.

Nostrils near outer edges of noseleaf,opening upward, forward

and

slightlyoutward.

Behind

the noseleaf

and

separatedfrom it

by

a deep grooveisan irreg ularbut well-developed horseshoe-shaped ridge,theendsof

which

blend withtheglandularupperlip.

Chin

divided

by

a deep groove,

narrow

below, wide above,from the sidesof

which

spring fourto six small, fleshyprojections.

Membranes.

The membranes

are thick

and

leathery; the wings

and

propatagium broad

and ample;

the uropatagium greatly reduced (only 10

mm.

wide at base). Propatagium extending along forearm tojoin

(3)

New Glossophagine Bats from

the

West

Indies.

35 thumb

at distal

end

of metacarpal.

The membranes

arepractically

naked

throughout,as the fur of the

body

reaches thewings (both above

and

below)inanarrowlineonly.

Feet.

The

foot is long

and

strong, about two-thirds length of tibia.

Toesessentiallyequalinlength, the first

and

fifth slightlyshorterthan theothers. Claws large

and

sharp, nearly one-third as long as restof foot. Calcardistinctbut reduced toa

mere

stub3

mm.

in length.

Tail. Tail slightlylonger than foot, a little less than halffreefrom

membrane.

I'\irandcolor.

The

fur is loose intexture,

and

only moderately long (about10

mm.

atmiddleof back). Itiscloselyconfinedtobody,scarcely reaching wings.

That

of

head

covers external basal fourth of ears.

Facedensely hairyas far forward as ridge behind noseleaf.

Chin and

noseleafnaked. Lips

and

ridge behind noseleaf sprinkled with fine, shorthairs.

Color of

two

skins (topotypes) collected

June

3, 1884,

by

C. J.

May-

nard(Nos. 85

and

86,Millercollection): furofbackwhitishgraythrough basalhalf, then lightclay color faintly tinged with pinkish buff.

The

pale bases of thehairsappearirregularly atthesurface. Ventralsurface pinkishbuff,the hairs grayishatbase. Ears,

membranes, and

feet light brown. After thirteenyears' immersionin alcoholthe color of the type does notdifferappreciablyfromthat of theseskins.

K!;ull.

The

skull ofPhyllonyclerisplanifrons differsfromthatofP.xeze- korui

most

noticeably inthe presence of veryslenderbut completezygo- maticarches.

The

rostrum isslightlybroader

and

flatter

and

the brain- case smallerrelatively tothesizeoftheskull.

The

facial profileisstraight fromexternal narestobaseofproencephalon,

where

it rises atanangle ofabout 12. Proencephalon small, indistinctly

marked

oft*from very largemesencephalon. Metencephalonsmall

and

slightlyoutlined.

Lach

rymalregionabruptly swollen. Antorbitalforamenplaced obliquelyover posterior part ofsecondpremolar.

Bony

palateslightlyarched, itsgen eralformnearly rectangular, thewidthbetween penultimate molars about half length. Vacuitiesbehindincisorssmaller than in P. sezekorni,but distinct. Pterygoids long, the distancefrom

hamular

toposteriormolar slighllygreaterthanlength of tooth

row

behindcanine.

The

pterygoids are stronglyhollowed from within;

and

the interpterygoidfossaispartly closedinimmediately behindthe

bony

palatebythe thin shelf-likeedges ofthe pterygoids. Ventral aspect of roof of posterior nares flat.

A

slightdepression on each sideofthe faint

median

ridgeonbasioccipital betweenaudital bullse. Audital bulke small

and

round, their greatest diameteraboutequalto leastwidthof palate

between

second premolars.

Rim

of external nares thick, not flaring.

Mandible

slender, thedepth containedabout seven timesingreatest length.

The

skullof thetype measures: greatest length 25; basal length 22;

basilarlength 20; zygomatic breadth 11; interorbitalbreadth4.8; lach rymal breadth6; mastoid breadth 11; fronto-palatal depth3.4; depth of braincasefromhighest pointtolevel of audital bullte 9.6; maxillary

(4)

3C>

Miller New Glossophagine BalxJ'rnm

flic lIV.s/ Indie*.

tooth

row

(exclusive of incisors) 8.4;

mandible

10.4; mandibulartooth

row

(exclusive of incisors)9.

Teeth.

The

teeth are slightly larger than inP. sezekortu orP. bombi- fi-ons.

Crown

of firstupper molarnearly equal in length to thatofsec

ond and

third together. First upper premolar minute, usually closely

wedged between

canine

and

second premolar. Second premolar larger than secondmolar. Firstlowermolarnearlydoubleaslongasfirstlowfr

premolar; second premolarslightlylargerthanfirst,

which

isaboutequal tothird molar.

Measurements (type specimen). Total length 78; tailvertebrae 17; tibia 22; foot14; forearm47;

thumb

12; second finger 35; third finger 82;

fourthfinger62; fifthfinger64; earfrommeatus 19; earfrom

crown

15;

widthof ear13.6; tragus8.2; widthof tragusatanteriorbase22

; height of noseleaf from upperlip4.6; widthof noseleaf5.

Specimens examined.

One hundred and

twenty-four (2skins), allfrom the

same

limestone cavea

few

milesfromthecityof Nassau.

Phyllonycteris

bonabifrons sp.nov.

Type,adulttf (in alcohol),No.86274,UnitedStatesNational

Museum,

collectedina limestone cave near

Bayamon,

ProvinceofSan Juan, Puerto Rico,January 18, 1899,

by

Paul

Beck

with.

Generalcharacters. Seesynopsis.

Ears. Insize

and

formthe ears are asinP. planifrons. Tragusshorter

and

broaderthanin P.planifrons,the anterior border stronglyconvex,

and

with from onetothreepointedoutgrowths abovemiddle. Posterior border

much more

conspicuously denticulatethan in P. planifrons.

Muzzle

and

chin.

The

muzzle

and

chin areessentially as inthe Baha-

man

species,butthe ridgebackof the noseleafisseparatedfromthelatter

by

a

much

broadergroove,

and

the fleshyoutgrowths

from

thesidesof the grooveinchinare

more

conspicuous.

Membranes,feel, tail,

and

furas inP.planifrons.

Color.

Both

fur

and membranes

are

much

darker thanin P. planifrons.

Inaspecimen (No. 86270)skinned afteronly

two

months' immersion in formalin

and

alcohol,thefurof the dorsal surfaceiswhitishgray through basal

two

thirds, then

mars brown

to tip. Ventral surface pale

wood

brown. Ears,feet,

and membranes

darkbrown.

Skull.

The

skullofPhyllonycterisbombifronsdiffersfromthatof P. plani frons in itsshorter, narrower,

more rounded

rostrum,

and

larger,

much

more

highly archedbraincase.

The

proencephalon risesabovethe plain oftherostrumatanangle ofabout 30.

Lachrymal

swellings well de veloped. Audital bulhe smallerthanin P. planifrons,the greatest

diam

eter ofeach considerablyless thanleastwidthof palatebetween second premolars. PtertgoidsslightlyshorterthaninP.planifrons.

Rim

ofex ternal nares thin

and

noticeablyflaring.

Mandible

slender.

The

skullof thetype measures: greatestlength 24.4; basal length 22; basilarlength 19.8; zygomatic breadth12; interorbital breadth5; lach rymal breadth6; mastoid breadth 11.4; fronto-palatal depth 3; depth

(5)

New Glossophagine Bate from

the

West

Indies.

37

ofbraincasefromhighest pointtolevel of auditalbailee 10.4; maxillary tooth

row

(exclusive ofincisors)8; mandible 10; mandibular tooth

row

(exclusive of incisors)9.

Teeth. Except for their

somewhat

smaller general size, the teeth of Phyllonycterisbombifrons

do

notdifferappreciablyfromthose ofP. plani- frons.

Measurements(type). Total length 78; tailvertebrae 14; tibia22; foot 14; forearm48.4;

thumb

14; second finger 38; third finger 81; fourth finger65; fifthfinger 64; earfrom meatus18; earfrom

crown

14; width of ear 13; tragus7; widthof tragusatanterior base2.2; heightof nose- leaffrom upperlip4.6; widthof noseleaf5.

Specimens examined. Fourteen,allfromthetypelocality.

Referensi

Dokumen terkait

265-274 12 October 1976 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON FOSSIL WOODCOCKS: AN EXTINCT SPECIES FROM PUERTO RICO AND AN INVALID SPECIES FROM MALTA AVES:

Proximal medial manal suckers first 5-7 with low proximal plate, 1-2 low, rounded, lateral teeth, 1-2 slightly narrower distolateral teeth, 1 buntly pointed median tooth; next distal