A marine sponge Petrosia similis afforded two compounds which belongs to bis-quinolizidine alkaloids namely, petrosin (1) and petrosin-A (2), respectively. Petrosin (1) and petrosin-A (2) showed anti-HIV inhibition with IC(50) values of 41.3 and 52.9 microm respectively. MAGI cell assays indicated that the compounds inhibited early steps of HIV replication. In extracellular HIV-1 Reverse Transc...

Microphorella similis Brooks, a new Palaearctic species, is described and illustrated. It is very closely related to M. praecox (Loew, 1864), the type species of the genus. The new species is known from Leuk-Pfynwald in the Swiss Alps, where it was found sympatrically with M. praecox on gravel in the floodplain of the Rhône River in May. A diagnosis and abridged redescription of M. praecox is a...

Electribius relictus sp. nov. (Artematopodidae) is described from a cloud forest fragment in central Veracruz, Mexico. This species is distinguished from the other extant species known, E. crowsoni Lawrence (Mexico) and E. similis Lawrence (El Salvador), by the pronotum and elytra completely black, pronotum with margins crenulate at base, fifth abdominal ventrite with distinct median ridge, and...

A total of 38 ticks were collected on black spiny-tailed iguana, Ctenosaura similis, in a secondary dry forest from northern lowlands Guanacaste, Costa Rica. At the time finding, animal has not mobility hind legs and tail. Ticks identified morphological molecularly as Amblyomma scutatum. PCR amplification tests to Rickettsia, Anaplasmataceae Borrelia negative. Possible caused lack is discussed.