Lorisicola mjobergi (Stobbe, 1913) sensu lato (Insecta, Psocodea, Phthiraptera, Ischnocera, Trichodectidae) from two Nycticebus species (Mammalia, Primates) from Vietnam, with notes on the genus Lorisicola Bedford*

From the Cuc Phuong National Park in North Vietnam, the occurrence of Lorisicola mjobergi s. l. on two new host species is presented for the first time: Nycticebus bengalensis Lacépède and N. pygmaeus Bonhote (Loridae, Lorinae). The material from both host origins cannot be sufficiently distinguished from that of L. mjobergi (Stobbe, 1913) ex “Nycticebus borneanus [?] from North Borneo” at present. Also the (poorly preserved) male of “Trichodectes brachycephalus Ewing” from Malaysia seems to be as conspecific with the still monotypic Lorisicola mjobergi s. l. as a pair collected on “Nycticebus buku ” (= N. coucang ) on the west coast of Sumatra. Thus, Lorisicola Bedford, 1936 has so far only been found on five of the 11 Asian Loris andNycticebus species, while no finding of this unusual trichodectid has yet become known from the five African Angwatibos and Pottos (Loridae, Perodicticinae). Lorisicola mjobergi s. l. is described in detail according to literature and Vietnamese material, with special attention to head morphology including chaetotaxy. At the same time, a first attempt is made to develop a setae  terminology based on homology for avian and mammalian chewing lice. It can be made clear that Lorisicola is  morphostructurally so unique within the trichodectids that it must seem absurd to place it together with Felicola Ewing, Suricatoecus Bedford and/or Paradoxuroecus Conci in the Tribus Felicolini Kéler, 1938, as was done after a cladistic analysis and classification presented in 1985 and remained unchallenged ever since. Several derived characters (a. o. in head shape and chaetotaxy, absence of gular plate, modified cervical sclerites, several head sutures, very large ommatidia, dorsal and ventral projection of abdominal pleurum IV, abdominal segment VII with complete tergite in ♂ and ♀, peculiar subgenital plate, simple gonapophyses lobe with 6-7 mesochaetes on the inner side, prominent male genital) clearly speak for a relative independence of Lorisicola (at least in a separate tribus - Lorisicolini - within the Trichodectinae Kellogg). This new situation made it necessary to transfer allFelicola species (incl. “Trichodectes malaysianus Werneck”), which had previously been placed in Lorisicola, into a subgenus of their own. Lyalicola subgen. nov. with the subgenerotype “Felicola hercynianus v. Kéler, 1957” is proposed for this purpose. All 11 species belonging to the new subgenus (in comb. nov.) are listed with their type hosts. The morphological similarities between Lorisicola and Cebidicola Bedford (Trichodectinae, Cebicolini), which seem to have been insufficiently considered so far, are explicitly pointed out.

Vietnamese title: Lorisicola mjobergi (Stobbe, 1913) sensu lato (Insecta, Psocodea, Phthiraptera, Ischnocera, Trichodectidae) từ hai  loài Nycticebus (Mammalia, Linh trưởng) từ Việt Nam, có ghi chú thuộc chi Lorisicola Bedford

TSummary by Tóm tắt
Tại Vườn Quốc gia Cúc Phương, miền Bắc Việt Nam, lần đầu tiên có sự xuất hiện của Lorisicola mjobergi trên hai loài ký chủ mới:Nycticebus bengalensisLacépède và N. pygmaeusBonhote (Loridae, Lorinae). Mẫu vật được thu thập trên hai loài ký chủ trên không thể được phân biệt với L. mjobergi (Stobbe, 1913) được tìm thấy trên “Nycticebus borneanus [?] từ Bắc Borneo”. Lorisicola mjobergi được mô tả chi tiết theo tài liệu và tư liệu Việt Nam, đặc biệt chú ý đến hình thái của phần