Page images
PDF
EPUB

EAST AFRICA: SUDAN (Hoogstraal 1954B).

UGANDA (Neave 1912. Mettam 1932. Wilson 1948A,1950).

HOSTS

All authors report this species from elephants, Loxodonta africana subsp. Mettam (1932) also listed the "common duiker

BIOLOGY

Unstudied. In Banningville territory of Belgian Congo "all sick elephants carry this tick and Amblyomma tholloni, sometimes in great numbers" (Fain 1949).

DISEASE RELATIONS

It has been suggested that either this species or Amblyomma tholloni may transmit piroplasmosis (Nuttallia loxodontis) of elephants in the Congo.

REMARKS

Schulze (1941) noted features of the tarsus and haller's organ of this tick.

Santos Dias (1952F) has separated Mozambique populations into another subspecies, D. circumguttatus cunha silvai. These specimens are larger than those from more northerly parts of Africa and exhibit more irregular pale scutal coloration in several smaller, more divided spots rather than in three large spots as in females of the typical subspecies and eight large regular spots as in males of the typical subspecies. These differences, however, appear to be similar to individual variants of D. rhinocerinus, reported by Bequaert (1930B), and larger sub sequent collections may indicate the necessity of dropping this subspecies.

IDENTIFICATION

Characters in the generic key readily identify this tick and separate it from the only other species in the Sudan.

[graphic][graphic][merged small][merged small][graphic][graphic][merged small][merged small]

Figures 124 and 125, o, dorsal and ventral views Figures 126 and 127, o, dorsal and ventral views

DERMACENT OR RHINOCERINUS

Sudan Specimens

PLATE XXXIX

- 332

DERMACENTOR RHINOCERINUS (Denny, 1843) (= D. RHINOCEROTIS of authors)

[merged small][merged small][ocr errors][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

The material from uncertain localities near the Sudan Uganda border, which was the basis of King's (1911,1926) reports of the rhinoceros dermacentor from the Sudan, was collected by him in 1909 and 1911.

The recent specimens from Magwe and from the game reserve just west of the Nile near Nimule establish this species on both the west and east banks of Equatoria Province.

DISTRIBUTION IN THE SUDAN

Bahr El Ghazal: All specimens from grass, near Yirol to 25 miles west of Yirol; 23 November 1954, E. T. M. Reid legit (700", 509). 9 June 1954, P. Blasdale legit (19). Material in HH col lection.

DISTRIBUTION

D. rhinocerinus parasitizes the black and the white rhinoceros in eastern and southern Africa and in the Belgian Congo.

CENTRAL AFRICA: BELGIAN CONGO (Schwetz 1927C. Bequaert 1930A, B,1931. Tonelli Rondelli 1930A).

NOTE: According to Theiler (correspondence), the record for Ruanda Urundi by Santos Dias (1954D) is in error.

EAST AFRICA: SUDAN (King 1911,1926. Hoogstraal 1954B).

ETHIOPIA (Warburton 1910. Neumann 1922. Stella 1940). ERITREA (Stella 1940). ITALIAN SOMALILAND (Pavesi 1895. Paoli 1916. Tonelli_Rondelli 1930A. Niro 1935. Stella 1938A,1939A, 1940).

KENYA (Neumann 1912,1913,1922. Neave 1912. Anderson 1924A, B. Brassey-Edwards 1932. Lewis 1932A,1934). UGANDA (Neave 1912. Mettam 1932,1933. Wilson 1950C). TANGANYIKA (Gerstacker 1873. Neumann 19070,1910B,1913,1922. Morstatt 1913. Bequaert 1930A. Evans 1935. Schulze 1944A. J. B. Walker, unpublished, see HOSTS below).

SOUTHERN AFRICA: ANGOLA (Karsch 1878. Howard 1908. Bacelar 1950). MOZAMBIQUE (Howard 1908. Bedford 1932B. Santos Dias 1953B).

NORTHERN RHODESIA (Hoogstraal 1954C). SOUTHERN RHODESIA (Jack 1942. Specimens from Sebungwe: Theiler, correspondence). NYASALAND (Old 1909. Neave 1912. De Meza 1918A).

SOUTHWEST AFRICA (Theiler, unpublished). UNION OF SOUTH AFRICA (Denny 1843. Gerstacker 1873. Howard 1908. Dönitz 1910B. Breijer 1915. Curson 1928. Bedford 1932B. The localities in the first four references cannot be accepted without question; only Zululand records are sure (Theiler, correspondence).

Specimens of "subspecies permaculatus" (see REMARKS below) from "Zambeze" were reported by Neumann (19070,1910B).

NOTE: Records from ZANZIBAR (Howard 1908, quoted by later authors) probably result from the use of this name for East Africa by early writers.

« PreviousContinue »