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Biomedical subjects

J C Beaucournu

Publications and source records attributed to J C Beaucournu.

At least 19 recordsLinked to original sources

Three new fleas from Sulawesi, Indonesia (Siphonaptera: Pygiopsyllidae & Ceratophyllidae).

Gryphopsylla maxomydis n. sp. (Pygiopsyllidae), Medwayella rubrisciurae n. sp. (Pygiopsyllidae) and Macrostylophora theresae n. sp. (Ceratophyllidae) are described from endemic rodents in Sulawesi. Gryphopsylla maxomydis was collected from the murids Maxomys musschenbroekii and Paruromys dominator in Central Sulawesi (Sulawesi Tengah). However, M. musschenbroekii appears to be the true host of this flea because it has spiny pelage and G. maxomydis shows morphological adaptations for parasitizing spiny hosts including a remarkable "beak-like" structure on the head. This adatation is similar to a beak-like structure on the head of Gryphopsyllo hopkinsi (Traub) which parasitizes the spiny murid Maxomys whiteheadi in Borneo (Sabah). Medwayella rubrisciurae was collected from the large tree squirrel Rubrisciurus rubriventer in Central Sulawesi and this represents the first report of this flea genus in Sulawesi. Macrostylophora theresce was recorded from the murids Bunomys fratrorum, P. dominator and Rattus xanthurus in North Sulawesi (Sulawesi Utara); most other members of this flea genus parasitize squirrels in the Oriental and Palaearctic zoogeographical regions.

Adaptation, Physiological↗

[Bird fleas (Insecta: Siphonaptera): taxonomic diversity, biogeographical distribution].

If Mammals are the primary hosts of Siphonaptera, 6% of them have changed their trophic appetency for Birds. What are the reasons, what are the adaptations to be adopted by Fleas, what are the families or species groups of fleas concerned, and at last what are the host-families? As to this last question, it is clear that deviation was ecological but not phyletical.

Adaptation, Physiological↗

[Macrostylophora kinabaluae n. sp. (Insecta: Siphonaptera: Ceratophyllidae), a new flea from Sabah (Borneo, Eastern Malaysia)].

This species, known only by a single male, is described from Mount Kinabalu and thus is recorded from the same area as Macrostylophora borneensis (Jordan, 1926), teste Traub (1972). It is distinguished from its congeneric and characterized by the absence of eriged setae on the thorax and first abdominal tergits, as well as by the shape of terminal segments and the phallosom. Macrostylophora kinabaluae was found to parasitize the Sciurid rodent Callosciurus prevostii that is widespread throughout most areas in the Malaysian subregion.

Animals↗

[Two new species of fleas from Chile and Argentina(Insecta-Siphonaptera: Stephanocircidae and Rhopalopsyllidae) and raising of a new sub-genus of Plocopsylla Jordan, 1931].

A new subgenus of Plocopsylla is raised, Schrammapsylla Beaucournu and Ménier from the entire group B of Schramm & Lewis, 1988 and two new fleas from Chile and Argentina are described: Plocopsylla (S.) muruai n. sp. Beaucournu and Gallardo and Ectinorus (E.) mimacydis n. sp. Beaucournu and Gallardo. These two taxa are only known by the male sex.

Animals↗

[Three new species of the genus Medwayella Traub, 1972 (Insecta: Siphonaptera: Pygiopsyllidae) from Sabah (eastern Malaysia, Borneo)].

Medwayella traubiana n. sp., M. pfeifferi n. sp. and M. sabahae n. sp. (Pygiopsyllidae) are described from Sabah (north of Borneo island), the first two on Tupaia tana (Scandentia), the last on Sundasciurus lowii (Rodentia). Sex male is only identified, because these fleas have been collected in sympatry, or even in syntopy. Their determination is based on segment IX and aedeagus. If M. traubiana and M. pfeifferi are related to some known species, M. sabahae is clearly distinct from other Medwayella.

Animals↗

Parasites of domestic and wild animals in South Africa. XLIV. Fleas (Insecta: Siphonaptera: Pulicidae) collected from 15 carnivore species.

Fleas were collected from 61 wild carnivores belonging to 13 species in various nature reserves and on farms, two feral domestic cats in a nature reserve and a domestic dog in the city of Johannesburg. Eleven flea species, including two subspecies of one of these, belonging to six genera were recovered. Amongst these only Ctenocephalides felis felis and Ctenocephalides felis strongylus are considered specific parasites of carnivores. The remaining ten species normally infest the prey animals of the various carnivores.

Animals↗

[The plague in Vietnam: history and inventory of collected fleas (insecta, Siphonaptera) in the inhabited zones].

Ten flea species are reported in anthropic zones of Vietnam. Xenopsylla vexabilis is also here included because of it has been involved in others plague's countries. Lentistivalius klossi is the only selvatic flea known as parasite of synanthropic rats. L. klossi bispiniformis (Li and Wang, 1958), first describe from Chinese specimens, is here synonymized (syn. nov.) with the nominal subspecies.

Animals↗

Gymnomeropsylla n. gen. (Siphonaptera: Pygiopsyllidae) from Sulawesi, Indonesia, with the description of two new species.

Compared to related genera, this new flea genus is characterized by the absence, or presence of very few, bristles on the external surface of femur I and especially by the morphology of the apex of sternite IX in the male, which is hyaline and lacks spiniform bristles. The two new species, G. bunomydis and G. margaretamydis, are distinguished from each other by the structure of the genitalia, and the presence of numerous erect bristles on the thorax and abdominal tergites of the latter species. Both of these new species parasitize murine rodents that are endemic to Sulawesi; G. bunomydis was collected mainly from Bunomys chrysocomus and G. margaretamydis only from Margaretamys parvus.

Animals↗

[A new flea species of the genus Allopsylla Beaucournu et Fain, 1982 (Siphonaptera: Ischnopsyllidae) from Central African Republic, found on a little known molossid bat].

A pair of Allopsylla lobayensis Beaucournu & Barrière, new species were collected the first of November 1999 in Ngotto forest, in the south-western part of the Lobaye basin, Central African Republic (CAR). The host specimen, a little known molossid bat (Myopterus whitleyi), constitutes the first record of this species in CAR. The new flea species appears taxonomically close to A. hetera Beaucournu & Fain, 1982, one of the two other Allopsylla species, previously know from other faunal regions (A. alloides in Nigeria and A. hetera in Democratic Republic of the Congo). The parasitism of three distinctly different hosts by the three known Allopsylla species raises questions regarding the host-parasite specificity of this group.

Animals↗

[Two new species of Stivalius (Siphonaptera--Pygiopsyllidae--Pygiopsyllinae) from Indonesia].

The fleas, S. meridionalis n. sp. from Timor and S. franciscae n. sp. from Sulawesi, Indonesia are described and illustrated. S. meridionalis was collected in Central Timor (Timor Tengah) at elevations between 930 m and 1,520 m, mainly from the murine rodent Rattus tanezumi, although one specimen was recovered from a house shrew, Suncus murinus. S. franciscae was collected in Central Sulawesi (Sulawesi Tengah) at known elevations between 950 m and 2,255 m from six species of native endemic murine rodents, especially Rattus hoffmanni, and from two species of commensal murine rodents. One specimen of S. franciscae was also collected from the native endemic murine Paruromys dominator in North Sulawesi (Sulawesi Utara) at 1,780 m. These two new flea species are compared with the previously described taxa included in the genus Stivalius sensu stricto.

Animals↗

The flea genus Sigmactenus (Siphonaptera: Leptopsyllidae): three new taxa from Sulawesi, updated identification key, and distribution map for all known species and subspecies.

One new species and two new subspecies of fleas are described. These are S. sulawesiensis n. sp. from North and Central Sulawesi, S. alticola pilosus n. ssp. from Central Sulawesi, and S. alticola crassinavis n. ssp. from North Sulawesi. All three of these new taxa are ectoparasites of native, endemic murine rodents. Two of the new taxa, S. sulawesiensis and S. alticola crassinavis, coexist on the same mountain, Gunung Moajat, in North Sulawesi. The related S. alticola alticola, which becomes the nominate subspecies, parasitises the murine rodent Maxomys alticola in northern Borneo (Sabah) and it is hypothesized that Sigmactenus first colonized Sulawesi as an ectoparasite of ancestral Maxomys, or perhaps Rattus, as these murines dispersed from southeast Asia to Sulawesi; 15 endemic murine rodent species belonging to these two genera are known to currently inhabit Sulawesi. An identification key and distribution map are included for all known species and subspecies of Sigmactenus. In addition to the three new taxa and S. a. alticola, these include: S. celebensis from South Sulawesi, S. timorensis from Timor, S. toxopeusi from New Guinea, and S. werneri from the Philippines (Mindanao and Negros).

Animals↗

The flea genus Sigmactenus (Siphonaptera: Leptopsyllidae): a new species from timor and new material from New Guinea and the Philippines.

Both sexes of Sigmactenus timorensis n. sp. are described from Rattus tanezumi and Rattus exulans collected in West Timor, Indonesia. The true host presumably is a native murine rat such as the extant, endemic Rattus timorensis or 1 of several extinct, endemic Timorese rats. Analyses of new collections of Sigmactenus cavifrons and Sigmactenus toxopeusi from New Guinea demonstrate that these fleas show considerable morphological variation. We propose that they represent a single species with the name S. toxopeusi having priority. New collections of Sigmactenus werneri from the Philippines expand the known hosts and geographical distribution of this flea.

Animals↗

[Presence in the eastern part of the Spanish Pyrenees of Amphipsylla sibirica sepifera Jordan and Rothschild, 1920 (Siphonaptera: Ceratophyllidae: Amphipsyllinae)].

The detection of two males and one female of Amphipsylla sibirica sepifera on three Clethrionomys glareolus is pointed out. The rodents were taken in Alt Aneu and Espot, two towns of Lerida (a Spanish Province). The finding of this flea species on Spanish Pyrenees increases to the west its geographical distribution and adds one new species to the Iberian flea fauna.

Animals↗

Parasites of domestic and wild animals in South Africa. XXXVI. Arthropod parasites of yellow mongooses, Cynictis penicillata (G. Cuvier, 1829).

Eighty yellow mongooses, Cynictis penicillata, from five localities in South Africa were examined for arthropod parasites. Ten ixodid tick species, of which Haemaphysalis zumpti was the most abundant, prevalent and widely distributed, were collected. The mongooses were also infested with two mite species. Echidnophaga gallinacea was the most abundant of the eight flea species collected. It and Ctenocephalides connatus were present at every locality. A single biting louse species, Felicola cynictis, was recovered and it was the most prevalent ectoparasite on the mongooses.

Animals↗