The Project Gutenberg EBook of Comments on the Taxonomic Status of Apodemus peninsulae, with Description of a New Subspecies from North China, by J. Knox Jones, Jr. This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org Title: Comments on the Taxonomic Status of Apodemus peninsulae, with Description of a New Subspecies from North China Author: J. Knox Jones, Jr. Release Date: March 17, 2010 [EBook #31674] Language: English Character set encoding: ISO-8859-1 *** START OF THIS PROJECT GUTENBERG EBOOK APODEMUS PENINSULAE *** Produced by Chris Curnow, Joseph Cooper, Joseph R. Hauser and the Online Distributed Proofreading Team at http://www.pgdp.net UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Volume 9, No. 8, pp. 337-346, 1 fig. in text, 1 table August 15, 1956 Comments on the Taxonomic Status of Apodemus peninsulae, with Description of a New Subspecies from North China BY J. KNOX JONES, JR. UNIVERSITY OF KANSAS LAWRENCE 1956 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Robert W. Wilson Volume 9, No. 8, pp. 337-346, 1 fig. in text, 1 table Published August 15, 1956 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1956 26-3854 Comments on the Taxonomic Status of Apodemus peninsulae, with Description of a New Subspecies from North China BY J. KNOX JONES, JR. In the past several years the United States National Museum has received a large number of mammals from central and southern Korea through the auspices of the Commission on Hemorrhagic Fever of the Armed Forces Epidemiological Board. Among these Korean collections are more than a hundred specimens of a murine rodent originally described as "_Micromys speciosus peninsulae_" by Oldfield Thomas but currently placed in the genus _Apodemus_. In attempting to ascertain the specific relationships of this mouse I have examined, through the generosity of Dr. David H. Johnson, Acting Curator of Mammals, most of the other Oriental specimens of the subgenus _Sylvaemus_ in the U. S. National Museum and it is on this combined material that the following comments and description are based. Three general groups of the genus _Apodemus_ are presently known to occur on the mainland of northeast Asia. One is the distinctive _Apodemus agrarius_, lone representative of the subgenus _Apodemus_. The others, both in the subgenus _Sylvaemus_ and closely resembling each other, are represented by a small animal that is currently regarded as conspecific with _Apodemus sylvaticus_ and a larger animal of which the Korean mouse, _peninsulae_, is representative. The oldest trivial name applied to the large _Sylvaemus_ is _major_ of Radde, 1862, in the combination [_Mus sylvaticus_] vrt. _major_. This is, however, twice preoccupied (see Ellerman and Morrison-Scott, 1951:566). The next available name is _peninsulae_ of Thomas, 1907, which was applied to mice from central and southern Korea (type from Mun'gyong, 110 mi. SE Seoul, Korea), and was originally proposed as a subspecies of the insular Japanese species, _Apodemus speciosus_. G. M. Allen (1940:949), who recognized _peninsulae_ as a monotypic species, was the first investigator to make the important distinction that it was not conspecific with the Japanese _speciosus_, although Hollister (1913:1-2) and Miller (1914:89) had previously used the combination _Apodemus peninsulae_, evidently with the same thought in mind. [Illustration: FIG. 1. Ventral views of skulls and left maxillary tooth-rows of two species of the genus _Apodemus_. _a._ _Apodemus flavicollis flavicollis_ (Melchior), Lolland, Denmark, adult [Male], No. 141691 USNM, ×2. _b._ _Apodemus flavicollis flavicollis_ (Melchior), Mauseklippe, Germany, young [Male], No. 112895 USNM, ×10. _c._ _Apodemus peninsulae peninsulae_ (Thomas), Central Nat'l Forest, near Pup'yong-ni, 200 m., Korea, subadult [Female], No. 300650 USNM, ×10. _d._ _Apodemus peninsulae peninsulae_ (Thomas), 6 mi. S Yongdongp'o, Korea, adult [Male], No. 299554 USNM, ×2. In comparing the ventral views of skulls note especially the size and location of incisive foramina and posterior palatine foramina as well as the breadth of mesopterygoid fossae. In comparing the left maxillary tooth-rows note especially the size of M3 and the reduced posterointernal cusp on Ml in _A. peninsulae_.] More recently, Ellerman (1949:32) and Ellerman and Morrison-Scott (1951:566) have arranged _peninsulae_ as a subspecies of _Apodemus flavicollis_ under the assumption that all the members of the subgenus _Sylvaemus_ on the eastern Asiatic mainland are subspecies of one or another of the species of western Europe, _A. flavicollis_ or _A. sylvaticus_. Ellerman (in Ellerman and Morrison-Scott, 1951:564) states: "The majority of the forms I distribute in a somewhat arbitrary manner between _sylvaticus_, average smaller skull, and _flavicollis_, average larger skull; occurring together nearly throughout the Palaearctic. I feel fairly sure that there are some errors of judgment in my arrangement, and equally sure that there is no other way to define species in this very large and difficult group." I have compared the specimens of _peninsulae_ available to me from central and southern Korea with specimens of _A. f. flavicollis_ from Denmark, Germany and Sweden and find, although the two are similar in many ways, that _peninsulae_ differs from _flavicollis_ in several important characters: Mammae 1-2=6 in _flavicollis_, and 2-2=8 in _peninsulae_; incisive foramina reaching level of alveoli of M1, or nearly so, in _flavicollis_, but ending conspicuously short of that level in _peninsulae_; posterior palatine foramina large in _flavicollis_ and opposite a point where M1 and M2 meet, but small in _peninsulae_ and situated farther back on the palate, opposite M2. Moreover, _peninsulae_ lacks the characteristic buffy throat patch of _flavicollis_, has a much reduced posterointernal cusp on the M1, a relatively (frequently actually) larger M3 and, on the average, a broader mesopterygoid fossa. In view of these differences, all of which appear to be constant, I consider _peninsulae_ specifically distinct from _flavicollis_. Throughout its known geographic range (see below) _peninsulae_ is evidently confined to wooded terrain, either scrub or brush types or forested areas, and the vernacular name wood mouse, therefore, seems appropriate for this species. The type specimens of _Apodemus praetor_ Miller (type from Sungari River, 60 mi. SW Kirin, Manchuria) and _Apodemus nigritalus_ Hollister (type from Tapucha, Altai Mountains, Siberia) agree with _peninsulae_ as concerns the above characters and differ from it only in minor external and cranial features. They are, therefore, here considered as subspecies of the latter. Ellerman (1949:32) and Ellerman and Morrison-Scott (1951:567) regarded _nigritalus_, like _peninsulae_, as a subspecies of _flavicollis_. The subspecies _praetor_, on the other hand, has generally been regarded as a synonym of _peninsulae_ by recent authors. Howell (1929:58) noted that the holotype was, "... a phenomenally large specimen such as is encountered occasionally in almost all groups of rodents." He ascribed the color differences noted by Miller to "seasonal" variation. The holotype of _praetor_ is undeniably larger than the other adult specimens listed in the original description. These paratypes and other specimens of _praetor_ available to me are approximately the same size externally and average only slightly larger cranially than specimens of _peninsulae_ from central and southern Korea. However, the dorsal coloration of _praetor_ is somewhat darker and duller than that of _peninsulae_, especially in summer pelage when _praetor_ lacks the conspicuous bright ochraceous tinge of the Korean specimens. In addition, _praetor_ has broader zygomatic plates with correspondingly deeper zygomatic notches and the color on the face of the upper incisors averages much more orange than in _peninsulae_. In the north then, wood mice range from Korea and Manchuria westward at least as far as the Altai Mountains. For mice from the intervening Siberian areas Russian workers have used the name _major_ which, as noted above, is unavailable. The exact relationships of the mice of these areas to previously named subspecies is unknown to me and I have not seen specimens of "_Mus (Alsomys) major rufulus_" of Dukelsky, 1928, the type locality of which is 75 versts (approximately 50 miles) SE Vladivostok, Siberia. It appears to be of the same species as _peninsulae_ and judging from the original description it closely resembles _praetor_. Neither have I seen specimens of the Sakhalin Island mouse, _giliacus_, which Ellerman (1949:32) regards as a subspecies of _Apodemus sylvaticus_. I feel reasonably sure, however, that it will prove to be a subspecies of _peninsulae_. In the original description _giliacus_ was referred to as, "Most closely allied to the Korean subspecies..." (Thomas, 1907:411). In China the extent of the distribution of _Apodemus peninsulae_ is also uncertain. Allen (1940:949-50) reported its occurrence from Jehol and Hopeh in the northeast, southwestward through Shansi, Shensi and eastern Kansu to Szechuan and northwestern Yunnan. Throughout most of this region it occurs with another mouse, currently regarded as conspecific with _Apodemus sylvaticus_, and the two kinds have been confused by some previous authors. Howell (1929:58), for instance, reported twelve specimens of _peninsulae_ from 65-75 mi. NE Peking but my examination of these mice indicates that only four are _peninsulae_ while the others are referrable to what is currently regarded as _Apodemus sylvaticus draco_. Another subspecies of _sylvaticus_, _A. s. orestes_, occurs in Szechuan and Yunnan and it is certain that some records of distribution ascribed to _peninsulae_ from those provinces actually represent _orestes_ (see Allen, 1940:949-50). _A. sylvaticus_ is distinguishable from _peninsulae_ by darker ears, blackish preauricular patches, dark eye rings, a noticeably smaller skull, incisive foramina that reach the level of Ml (or nearly so), much larger auditory bullae, and a more fully developed posterointernal cusp on M1. Too, _sylvaticus_ typically has 1-2=6 mammae although Allen reports finding a 2-2=8 formula in some specimens. _Apodemus latronum_, regarded as a full species by Osgood (1932:318) and G. M. Allen (1940:950) but as a subspecies of _flavicollis_ by Ellerman (1949:32) and Ellerman and Morrison-Scott (1951:567), also occurs in Szechuan and Yunnan. Its relatively dark color, large feet and large ears, _flavicollis_-like skull and large molar teeth immediately separate it from _peninsulae_ although the two possibly have been confused in the earlier literature. Until a complete revisionary study of the Asiatic members of the subgenus _Sylvaemus_ can be undertaken the presence of _peninsulae_ in southwestern China must remain in question. The western limits of the geographic range of _Apodemus peninsulae_ are unknown. _Apodemus gurkha_ Thomas, 1924, from Nepal is said to have 2-2=8 mammae but the description is not otherwise suggestive of close relationship to _peninsulae_. Farther to the west, _Apodemus flavicollis rusiges_ Miller, 1913, from Kashmir seems to have been properly assigned as a subspecies of _flavicollis_ (cotypes and large series in USNM). Wood mice almost certainly do not occur in the Gobi Desert. They are known as far west as the Altai Mountains to the north of the Gobi and at least as far west as Kansu (see below) to the south of it. Whether the geographic range of the species skirts the western edge of the arid regions of northern China is at present unknown; perhaps it does not. At any rate, mice available to me from the North Chinese provinces of Jehol, Shansi, Shensi and Kansu are notably different in certain external and cranial features from other known races of _Apodemus peninsulae_ and are here given subspecific recognition. All measurements are in millimeters. Capitalized color terms are from Ridgway (1912). Apodemus peninsulae sowerbyi, new subspecies _Type._--Adult female molting from winter to summer pelage, skin and skull, U. S. National Museum no. 175523, from 30 miles west of Kuei-hua-cheng, 7000 ft., northern Shansi, China; obtained on 23 May 1912 by Arthur de Carle Sowerby, original no. 456. _Distribution._--Known presently from eastern Kansu eastward through Shensi, Shansi and Hopeh to southern Jehol, probably also in northeastern Szechuan, exact limits of range unknown. _Diagnosis._--Size small for species (see measurements). Color: Upper parts (fresh summer pelage) averaging near (15'_a_) Ochraceous-Buff, suffused with blackish (especially mid-dorsally); winter pelage much paler; underparts grayish-white, individual hairs plumbeous at base, tipped with white; ears pale brownish; feet whitish above, darker below; tail bicolor, pale brownish above, whitish below. Skull: Small (see measurements); rostrum somewhat shortened and conspicuously down-curved; zygomatic notches relatively shallow; zygomatic plates narrow; braincase proportionally more inflated than in other subspecies of the species; auditory bullae moderately inflated; upper incisors slender, their faces averaging bright yellowish-orange. _Measurements._--External measurements of the holotype, followed by those of an adult male and female from the type locality, are, respectively: Length of head and body, 101, 102, 100; length of tail, 93, ----, 102; length of hind foot (_su_), 21, 21.5, 23; length of ear from notch, 14, 16, 15.5. Corresponding measurements for an adult female from 20 mi. E Taiyuan, Shansi, are: 91, 99, 23, 16. For cranial measurements see Table 1. Table Key: A: Occipitonasal length B: Zygomatic breadth C: Mastoid breadth D: Interorbital length E: Frontonasal length F: Nasal length G: Depth of skull H: Alveolar length of maxiary tooth-row TABLE 1.--CRANIAL MEASUREMENTS OF ADULTS OF SEVERAL SUBSPECIES OF APODEMUS PENINSULAE ============================================================================ Sex | | | | | | | | | and catalogue | A | B | C | D | E | F | G | H | number or number of | | | | | | | | | individuals averaged | | | | | | | | | ---------------------------------------------------------------------------- _Apodemus peninsulae peninsulae_, various localities in central Korea Average 10 (4M, 6F) | 29.2 | 14.2 | 11.8 | 4.7 | 20.1 | 11.4 | 10.2 | 4.3 | Minimum | 28.3 | 13.8 | 11.5 | 4.6 | 19.2 | 10.8 | 9.9 | 4.1 | Maximum | 29.8 | 14.6 | 12.2 | 5.1 | 20.7 | 12.0 | 10.5 | 4.4 | _Apodemus peninsulae nigritalus_, Tapucha, Altai Mts., Siberia USNM 175164, M (type) | 28.8 | 14.8 | 12.4 | 4.5 | 20.8 | 11.7 | 11.0 | 4.4 | USNM 175171, F | 28.2 | 13.7 | 11.8 | 4.5 | 19.8 | 11.2 | 10.3 | 4.5 | _Apodemus peninsulae praetor_, Sungari River, 60 mi. SW Kirin, Manchuria USNM 197792, M (type) | 30.5 | .... | 12.5 | 4.7 | 21.5 | 12.5 | 10.3 | 4.6 | USNM 197798, F | 30.2 | 14.4 | 11.8 | 4.6 | 21.6 | 12.7 | 10.6 | 4.6 | Mukden, Manchuria USNM 197782, M | 29.5 | 14.8 | 12.4 | 4.8 | 20.6 | 12.2 | 10.5 | 4.2 | _Apodemus peninsulae sowerbyi_, Kuei-hau-cheng, Shansi USNM 175523, F (type) | 27.9 | 13.3 | 11.7 | 4.5 | 19.6 | 11.4 | 9.9 | 4.0 | USNM 175521, M | 27.6 | .... | 11.5 | 4.6 | 18.9 | 11.4 | 9.7 | 4.1 | USNM 175522, F | 27.9 | .... | 11.8 | 4.6 | 19.4 | 11.3 | 9.8 | 4.2 | 20 mi. E Taiyuan, Shansi USNM 172558, F | 27.4 | 13.8 | 11.5 | 4.6 | 19.4 | 11.6 | 10.1 | 4.4 | 12 mi. S Yenan, Shensi USNM 155072, M | 27.8 | 14.1 | .... | 4.4 | 19.5 | 11.0 | .... | 4.3 | USNM 155073, F | 27.7 | 13.3 | 11.5 | 4.5 | 19.4 | 11.0 | 10.0 | 4.2 | USNM 155075, M | 27.9 | 13.5 | 11.4 | 4.5 | 19.2 | 11.0 | 10.0 | 4.3 | Hsin-lung-shan, 65 mi. NE Peking, Jehol USNM 219229, M | 27.7 | 13.8 | 11.4 | 4.5 | 19.0 | 10.9 | 10.4 | 4.4 | 15 mi. S Lanchow, Kansu USNM 155171, M | 27.7 | 13.6 | 11.7 | 4.6 | 19.0 | 11.3 | 9.9 | 4.5 | _Comparisons._--From _Apodemus peninsulae peninsulae_ (specimens from various localities in central Korea), _A. p. sowerbyi_ differs in: External size smaller throughout, especially hind foot; upper parts, especially in summer pelage, and dorsal aspect of tail paler; skull smaller and less massive; braincase proportionally more inflated; rostrum shorter and noticeably down-curved. From _Apodemus peninsulae praetor_ of Manchuria (holotype and paratypes), _A. p. sowerbyi_ differs in most of the same ways in which it does from _peninsulae_ as well as in having more shallow zygomatic notches, narrower zygomatic plates and smaller, more slender, upper incisors. From _Apodemus peninsulae nigritalus_ of the Altai Mountains of Siberia (holotype and paratypes), _A. p. sowerbyi_ differs in: Smaller size, both external and cranial; paler dorsal coloration; less convex cranial outline in lateral view; smaller auditory bullae. _Remarks._--_Apodemus peninsulae sowerbyi_ is named in honor of the late Arthur de Carle Sowerby whose collections of mammals from North China and Manchuria have added so much to our meager knowledge of that part of the world. Four specimens from Hsin-lung-shan, 65 mi. NE Peking, here assigned to _sowerbyi_, are darker dorsally than mice from farther to the west and in this respect may show approach to _A. p. praetor_. In all other features, however, they closely resemble the new subspecies. All of the specimens of _sowerbyi_ available to me are from altitudes of 3000 feet or higher. At lower elevations in North China, destruction of wooded habitats owing to intense land-use practices has probably restricted the distribution of _sowerbyi_ primarily to hilly and mountainous areas where brushy, scrub and forest habitats still prevail. _Specimens examined._--Thirty-three, all from North China, as follows: JEHOL: Hsin-lung-shan, 65 mi. NE Peking, 3000 ft., 4. KANSU: 15 mi. S Lanchow, 7400 ft., 1. SHANSI: Chiao-cheng-shan, 90 mi. W Taiyuan, 7000-8000 ft., 4; 30 mi. W Kuei-hau-cheng, 7000 ft., 5; Lung-wang-shan, 20 mi. E Taiyuan, 4000 ft., 10; 18 mi. W Taiyuan, 5000 ft., 1; 50 mi. NW Taiyuan, 5500 ft., 4. SHENSI: 12 mi. S Yenan, 4000 ft., 4. _Apodemus peninsulae_, then, is known or suspected to occur over much of southeastern Siberia, Manchuria, Korea and North China. The western limits of its geographic range are unknown. Over this vast area only four subspecies, one newly named, can be ascribed with certainty to _peninsulae_ whereas only two other kinds, _giliacus_ of Thomas from Sakhalin and _rufulus_ of Dukelsky from extreme southeastern Siberia are probably conspecific with it, the latter possibly a synonym of _praetor_. These considerations underscore the preliminary nature of the present paper. The mammalian fauna of northeastern Asia is scarcely better known today than was that of North America in 1885 when Dr. C. Hart Merriam organized what was later to become the U. S. Biological Survey. It seems to me that the correct names of four kinds of wood mice discussed above are as follows: _Apodemus peninsulae peninsulae_ (Thomas, 1907) _Apodemus peninsulae nigritalus_ Hollister, 1913 _Apodemus peninsulae praetor_ Miller, 1914 _Apodemus peninsulae sowerbyi_ Jones, 1956 LITERATURE CITED ALLEN, G. M. 1940. The mammals of China and Mongolia. Amer. Mus. Nat. Hist., New York, 2:XXVI + 621-1350, September 3. ELLERMAN, J. R. 1949. The families and genera of living rodents. British Mus., London, 3:V + 1-210, March. ELLERMAN, J. R., and T. C. S. MORRISON-SCOTT. 1951. Checklist of Palaearctic and Indian mammals, 1758 to 1946. British Mus., London, 810 p., November 19. HOLLISTER, N. 1913. Two new mammals from the Siberian Altai. Smith. Misc. Coll., 60:1-3, March 13. HOWELL, A. B. 1929. Mammals from China in the collections of the United States National Museum. Proc. U. S. Nat. Mus., 75:1-82, June 7. MILLER, G. S., JR. 1914. Two new murine rodents from eastern Asia. Proc. Biol. Soc. Washington, 27:89-92, May 11. OSGOOD, W. H. 1932. Mammals of the Kelley-Roosevelts and Delacour Asiatic expeditions. Field Columb. Mus. Nat. Hist., Zool. Series, 18:193-339, August 19. RIDGWAY, R. 1912. Color standards and color nomenclature. Washington, D. C., published by the author. THOMAS, O. 1907. The Duke of Bedford's zoological explorations in eastern Asia.--IV. A list of small mammals from the islands of Saghalien and Hokkaido. Proc. Zool. Soc. London, 1907:404-414, August 1. _Transmitted May 12, 1956._ 26-3854 End of the Project Gutenberg EBook of Comments on the Taxonomic Status of Apodemus peninsulae, with Description of a New Subspecies from North China, by J. Knox Jones, Jr. *** END OF THIS PROJECT GUTENBERG EBOOK APODEMUS PENINSULAE *** ***** This file should be named 31674-8.txt or 31674-8.zip ***** This and all associated files of various formats will be found in: http://www.gutenberg.org/3/1/6/7/31674/ Produced by Chris Curnow, Joseph Cooper, Joseph R. Hauser and the Online Distributed Proofreading Team at http://www.pgdp.net Updated editions will replace the previous one--the old editions will be renamed. 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