159:
41:
283:(m1 and m2), and four isolated molars (one first upper molar, M1, one third upper molar, M3, and two m2). It is larger than each of the three living species, and the known material additionally differs from those in a few details that may not hold in larger samples. Total skull length is 61.3 mm, longer than in the largest living species,
369:
are present before the protoconid and the metaconid. As on the m1, a transverse mesolophid and an ectostylid are present. The hypoconid and the entoconid are present, as is the posterolophid behind them. Within the posterolophid, there is a small valley that is absent in
326:. M2 has a longer mesoloph. M3 is largely flat-crowned, but the paracone is a bit more prominent than the rest. The valley between the cusps at the front is deeper than the valleys at the back. Each of the upper molars has three roots.
214:
were found during fieldwork in northwestern
Madagascar that started in 2001. The species was described in a 2010 paper by Pierre Mein and colleagues, together with another extinct rodent,
333:, the cusp at the front of the tooth, is oriented perpendicularly to the main axis of the tooth and on the lingual (inner) side is separated from the
643:
633:
581:
603:
613:
341:, another cusp on the labial (outer) side, is connected at its back to a longitudinal crest, which in turn anchors the transverse
357:
cusp, located lingually, is relatively high and is separated from the mesolophid before it by a deep valley. Another crest, the
623:
618:
386:
have been found at the sites of
Antsingiavo, Ambongonambakoa, and Ambatomainty in northwestern Madagascar, which are latest
638:
216:
628:
572:
Musser, G.G. and
Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 in Wilson, D.E. and Reeder, D.M. (eds.).
295:) and the length of the upper toothrow is 9.04 and 9.16 mm on the two sides of the skull (7.2–7.9 mm in
188:
found in several sites during field work that started in 2001. First described in 2010, it is placed in the genus
40:
608:
450:
have been recorded from some other localities in northwestern
Madagascar, but these have not been described.
221:
569:(subscription required). Comptes Rendus Palevol 9(3):101–112 (in French, with abridged English version).
366:
135:
195:
322:, a crest on the middle of the tooth, is distinct but short and located further to the back than in
565:
Mein, P., Sénégas, F., Gommery, D., Ramanivoso, B., Randrianantenaina, H. and Kerloc'h, P. 2010.
242:
35:
228:, where one of the sites where the species has been found is located. It is placed in the genus
202:, a rare element in the local rodent fauna, suggests that the region was previously more humid.
577:
236:
598:
158:
306:, a crest at the front of the tooth, lacks a smaller accessory spur that is present in
194:
together with three smaller living species, which may differ in some details of molar
592:
406:
358:
280:
248:
185:
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suggests that the past environment in northwestern
Madagascar was also more humid.
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is a rare element of the rodent fauna, which is dominated by multiple species of
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387:
330:
361:, is present behind the hypoconid. At the front of the m2, crests known as the
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102:
576:. Baltimore: The Johns Hopkins University Press, 2 vols., 2142 pp.
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52:
574:
Mammal
Species of the World: a taxonomic and geographic reference. 3rd ed
391:
319:
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72:
314:, one of the main cusps, is quite small; this cusp is more prominent in
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112:
567:
Nouvelles espèces subfossiles de rongeurs du Nord-Ouest de
Madagascar
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173:
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is known from a damaged skull, missing part of the back, a
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is classified in the exclusively
Madagascan subfamily
426:) Madagascar. The only surviving western species,
291:between the M1 is 8.7 mm (7.2–7.9 mm in
374:. Both m1 and m2 have two roots; m3 is unknown.
234:, together with three smaller living species,
8:
349:labial cusp. In front of the hypoconid, an
29:Temporal range: Late Pleistocene – Holocene
264:, which includes various African rodents.
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390:(126,000 to 10,000 years ago) and early
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287:(50.3–53.8 mm). The width of the
394:(less than 10,000 years ago) in age.
7:
553:Mein et al., 2010, pp. 104, 105
353:(a smaller cuspule) is present. The
430:, is restricted to a relict humid
14:
39:
544:Mein et al., 2010, table 2
414:live on the ground in eastern (
329:The m1 is long and narrow. The
279:(lower jaw) with the first two
526:Mein et al., 2010, p. 105
502:Mein et al., 2010, p. 104
474:Mein et al., 2010, p. 101
465:Mein et al., 2010, p. 102
1:
644:Fossil taxa described in 2010
634:Pleistocene first appearances
217:Brachytarsomys mahajambaensis
604:Endemic fauna of Madagascar
440:Brachyuromys mahajambaensis
176:that lived in northwestern
660:
345:crest, and then joins the
614:Extinct animals of Africa
535:Musser and Carleton, 2005
184:skull bones and isolated
156:
141:
134:
36:Scientific classification
34:
23:
16:Extinct species of rodent
378:Distribution and ecology
302:M1 is flat-crowned. The
624:Pleistocene Madagascar
434:area; the presence of
619:Fossils of Madagascar
367:anterolabial cingulum
639:Holocene extinctions
436:N. narindaensis
384:Nesomys narindaensis
273:Nesomys narindaensis
212:Nesomys narindaensis
200:N. narindaensis
169:Nesomys narindaensis
145:Nesomys narindaensis
127:N. narindaensis
25:Nesomys narindaensis
629:Pleistocene rodents
180:. It is known from
428:N. lambertoni
424:N. lambertoni
297:N. lambertoni
293:N. lambertoni
285:N. lambertoni
243:N. lambertoni
198:. The presence of
582:978-0-8018-8221-0
416:N. audeberti
237:N. audeberti
165:
164:
151:Mein et al., 2010
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560:Literature cited
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609:Extinct rodents
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420:N. rufus
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407:Macrotarsomys
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372:N. rufus
368:
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359:posterolophid
356:
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324:N. rufus
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316:N. rufus
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249:N. rufus
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222:specific name
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136:Binomial name
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363:anterolophid
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226:narindaensis
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189:
168:
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144:
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126:
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24:
18:
446:remains of
388:Pleistocene
382:Remains of
331:anteroconid
268:Description
210:Remains of
593:Categories
454:References
351:ectostylid
343:mesolophid
339:protoconid
337:cusp. The
304:anteroloph
262:Nesomyidae
258:Nesomyinae
196:morphology
178:Madagascar
103:Nesomyidae
444:Subfossil
410:. Modern
355:entoconid
347:hypoconid
335:metaconid
182:subfossil
121:Species:
59:Kingdom:
53:Eukaryota
392:Holocene
320:mesoloph
312:paracone
277:mandible
206:Taxonomy
99:Family:
93:Rodentia
83:Mammalia
73:Chordata
69:Phylum:
63:Animalia
49:Domain:
599:Nesomys
448:Nesomys
412:Nesomys
401:Eliurus
396:Nesomys
254:Nesomys
231:Nesomys
191:Nesomys
114:Nesomys
109:Genus:
89:Order:
79:Class:
580:
318:. The
310:. The
289:palate
281:molars
246:, and
220:. The
186:molars
174:rodent
432:karst
578:ISBN
438:and
418:and
404:and
365:and
299:).
595::
507:^
479:^
252:.
240:,
224:,
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