The auricle muscles in the relict rodent Laonastes aenigmamus (Rodentia: Diatomyidae)

O.V. Zherebtsova

Proceedings of the Zoological Institute RAS, 2012, 316(3): 273–281 · https://doi.org/10.31610/trudyzin/2012.316.3.273

Full text

Abstract

The facial muscle complex responsible for auricle mobility in the recently described relict rodent Laonastes aenigmamus Jenkins et al., 2005 (Diatomyidae) was studied for the first time. The members of other high-level rodent taxa that could be closely related to this species according to various hypotheses were also included in the morphological analysis for comparative purposes: Ctenodactylus gundi (Ctenodactylomorphi: Ctenodactylidae) and Chinchilla lanigera (Hystricognathi: Chinchillidae). The results of the study demonstrated the origin of the m. cervico-occipitalis and the mm. cervico-auriculares on the occipital crest and the unusual structure of the m. platysma cervicale, all distinctive features of the examined muscle complex in Laonastes. In Laonastes and Ctenodactylus, a number of common characters in the structure of the auricle muscles were also observed: the topography, interaction and areas of the insertion of the m. interscutularis and the m. cervico-occipitalis; the two-layer condition of the mm. cervico-auriculares. The obtained results do not contradict the available morphological and molecular data supporting the close affinity between Diatomyidae and Ctenodactylidae.

Key words

facial musculature, Laonastes aenigmamus, mobility of auricle, rodents

Submitted December 20, 2011 · Accepted September 4, 2012 · Published September 25, 2012

References

Dawson M.R., Marivaux L., Li Ch., Beard K.Ch. and Métais G. 2006. Laonastes and the "Lazarus еffect" in recent mammals. Science, 311: 1456–1458. https://doi.org/10.1126/science.1124187

Dieterlen F. 2005. Suborder Hystricomorpha. Infraorder Ctenodactylomorphi. In: Don E. Wilson and Dee A.M. Reeder (Eds.). Mammal species of the World. A Taxonomic and Geographic Reference. Vol. 2. Johns Hopkins University Press, Baltimore: 1536–1537.

Gambaryan P.P. 1989. Evolutsiy litsevoy muskulatury mlekopitaushchikh [Evolution of facial musculature in mammals]. Science, Leningrad, 151 p. [In Russian].

Gambaryan P.P. and Zherebtsova O.V. 1988. Transformation of hypodermic muscles caused by the development of acicular integument in Insectivora (Erinaceidae, Tenrecidae). Communication 2. Zoological Journal, 67(2): 189–199. [In Russian].

Hautier L. and Saksiri S. 2009. Masticatory muscle architecture in the Laotian rock rat Laonastes aenigmamus (Mammalia, Rodentia): new insights into the evolution of hystricognathy. Journal Anatomy, 215: 401–410. https://doi.org/10.1111/j.1469-7580.2009.01130.x

Huber E. 1930. Evolution of facial musculature and cutaneus field of trigeminus. Quarterly Review of Biology, 5(2): 133–188. https://doi.org/10.1086/394355

Huber E. 1931. Evolution of facial musculature and facial expression. Johns Hopkins University Press, Baltimore, 184 p.

Huchon D., Chevret P., Jordan U., Kilpatrick C.W., Ranwez V., Jenkins P.D., Brosius J. and Schmitz J. 2007. Multiple molecular evidences for a living mammalian fossil. Proceedings of the National Academy of Sciences of the USA, 104: 7495–7499. https://doi.org/10.1073/pnas.0701289104

Jenkins P.D., Kilpatrick C.W., Robinson M.F. and Timmins R.J. 2005. Morphological and molecular investigations of a new family, genus and species of rodent (Mammalia: Rodentia: Hystricognatha) from Lao PDR. Systematics biodiversity, 2(4): 419–454. https://doi.org/10.1017/S1477200004001549

Medvedeva G.A. 1989. Evolutionary tendencies in development of auricle musculature in bats. In: V. Hanák, I. Horáĉek and J. Gaisler (Eds.). European Bat Research. Charles University Press, Praha: 49–60.

Meinertz T. 1932. Die Hautmusulatur der Säugetiere. Untersuchungen über die Hautmuskulatur der Säugetiere mit besonderer Rücksicht auf das oberflächliche Facialisgebiet. I. Cavia cobaya. Gegenbaurs morphologisches Jahrbuch, 69: 110–220.

Meinertz T. 1941. Das oberflachliche Facialisgebiet der Nager. Zoologische Jahrbuch (Anat.), 67: 119–270.

Meinertz T. 1942. Das superfizielle Facialisgebiet der Nager. VI. Die Sciuriden. 1. Sciurus vulgaris L. Zeitschrift für Anatomie und Entwicklungsgeschichte, 112(1): 105–135. https://doi.org/10.1007/BF00523324

Meinertz T. 1943. Das superfizielle Facialisgebiet der Nager. VI. Die Sciuriden. 2. Marmota marmota L. Zeitschrift für Anatomie und Entwicklungsgeschichte, 112(3): 350–381. https://doi.org/10.1007/BF00523334

Meinertz T. 1944. Das superfizielle Facialisgebiet der Nager. VII. Die hystricomorphen Nager. Zeitschrift für Anatomie und Entwicklungsgeschichte, 113(1): 1–38. https://doi.org/10.1007/BF00522707

Nozdrachev A.D. 1973. Anatomija koshki [Anatomy of cat]. Nauka, Leningrad, 247 p. [In Russian].

Ruge G. 1886. Über die Gesichtsmuskulatur der Habaffen. Morphologische Jahrbuch, 11: 243–315. https://doi.org/10.5962/bhl.title.61089

Schneider H. 1961. Die Ohrmuskulatur von Asellia tridens Geoffr. (Hipposideridae) und Myotis myotis Borkh (Vespertilionidae) (Chiroptera). Zoologische Jahrbuch (Anat.), 79: 93–122.

Schreiber H.J. 1929. Untersuchungen über die Facialismuskulatur einiger Nager. Gegenbaurs morphologisches Jahrbuch, 62: 243–318.

Seiler R. 1975. Facialismuskeln von Perodicticus potto und Nycticebus coucang. Folia primatologica, 23(4): 275–289. https://doi.org/10.1159/000155677

Sullivan W.E. and Osgood C.W. 1925. The facialis musculature of the Orang (Simia satyrus). Anatomical Record, 29: 195–343. https://doi.org/10.1002/ar.1090290303

Woods C.A. 1972. Comparative myology of jaw, hyoid and pectoral appendicular regions of New and Old World hystricomorph rodents. Bulletin of the American Museum of Natural History, 147: 115–198.

Woods C.A. and Howland E.B. 1977. The skin musculature of Hystrycognath and other selected rodents. Zentralblatt fur Veterinarmedizin reihe Comparativ Anatomia, Histologia und Embryologia, 6(3): 240–264. https://doi.org/10.1111/j.1439-0264.1977.tb00437.x

Woods C.A. and Kilpatrick C.W. 2005. Suborder Hystricomorpha. Infraorder Hystricognathi. In: Don E., Wilson and Dee A.M. Reeder (Eds.). Mammal species of the World. A Taxonomic and Geographic Reference. Vol. 2. Johns Hopkins University Press, Baltimore: 1538–1600.

Zherebtsova O.V. 1990. Facial musculature of erinaceids (Erinaceidae). Trudy Zoologicheskogo Instituta AN SSSR, 215: 38–63. [In Russian].

Zherebtsova O.V. and Davydova A.N. 2011. Features of structure of the skin and subcutaneous muscles in Laonastes aenigmamus. Teriofauna Rossii i sopredeljnykh territoriy. Avtoreferaty dokladov IX S’ezda Teriologicheskogo Obshchestva RAN (1–4 February 2011, Moscow). KMK, Moscow: 162. [In Russian].