Bye, ContentDM: Another one bites the dust

Poster at Open Repositories 2014, Helsinki, Finland, June 9-13, 2014

Anatomy and ontogenesis of hymenopteran leaf galls of Struthanthus vulgaris Mart. (Loranthaceae)

Leaves of Struthanthus vulgaris Mart. (Loranthaceae) exhibit galls induced by a Hymenoptera. These galls pass through five developmental stages. In the first stage, a small brown swelling is observed on the surface of the leaf. Internally, the chlorenchyma cells around the eggs of the gall-makers are divided. In the second stage, the gall enlarges and its surface assumes a wavy appearance with a depressed region in its center. Within this depression, an incompletely divided gall chamber with embryos is observed. Neoformed parenchyma is present around the chamber and the secondary walls of fibers and sclereids are no longer observed. The vascular parenchyma shows hyperplasia. In the third stage, the gall grows larger and adopts an ellipsoidal shape. Fissures appear on the gall epidermis and the neoformed parenchyma is conspicuous, with a cortical and a medullar region. In the medullar region, each gall chamber, with one inducer in larval phase, is lined with 1-2 layers of nutritive tissue. The gall is larger still at the fourth stage of development and a periderm coats most of the gall. New vascular bundles, sclereids, and fibers are formed. The gall-makers are in advanced larval phase and no nutritive tissue cells are observed. In the fifth stage, the gall reaches its definitive size and the inducers are in the pupa phase. At this stage, the cortical region undergoes slight hypertrophy. The senescent gall shows the orifices of the exit channel made by the adult gallmakers. The anatomical studies of the hymenopteran gall enabled to compare this gall with a dipteran one, previously discribed in the same plant host. It is suggested that during the maturation of the gall, specific key processes are triggered, which bring about a specific cecidogenesis.

One-winged Drosophila subobscura: a phenotype with an obscure genetic basis

A line of one-winged Drosophila subobscura was studied. The absent wing is substituted by a bulky structure with macro and microchaetes, showing a thoracic appearance. Genetic crosses showed that there is no way to select for the trait by simple crossing. The number of one-winged flies in the various generations was always low. In one case a wingless fly was also obtained. The trait presents an unknown genetic pattern.

Pass charta öfver Bälterne, Sundet och S. Westra delen af Östersjön

Graverad af Fr. Akrel

Pass charta öfver Botten wiken

Graverad af Fr. Akrel

Pass charta öfver s[yd] ostra delen af Östersjön

Graverad af Fr. Akrel

Nieuwe paskaart voor een gedeelte van de Oost-Zee = Nouvelle carte hydrographique d'une partie de la Mer Baltique = Nya pass cort öfwer yen dehl af Oster-Siöön = The new sea map of the second of the East-Sea

Sisältää myös kartakkeet: Pastkaartje van de Noord Bodem, Suomenlahden itäosa ja Laatokka

Pass charta öfver n[or]ra delen af Östersjön, Ålands haf med s[öd]ra delen af Botten-Hafwet

Graverad af E. Åkerland

Pass charta öfver norra delen af Botten-Hafwet

Graverad af E. Åkerland

Pass charta öfver Finska wiken

Graverad af Fredr. Akrel

Nieuwe paskaart voor een gedeelte van de Oost-Zee = Nouvelle carte hydrographique d'une partie de la Mer Baltique = Nya pass cort öfwer yen dehl af Oster-Siöön = The new sea map of the second of the East-Sea

Sisältää myös kartakkeet: Pastkaartje van de Noord Bodem, Suomenlahden itäosa ja Laatokka

A laboratory cage for foster nursing newborn mice

We describe a cage to be used for foster nursing in order to guarantee that original mother's colostrum is not ingested by the newborn mice. A common (30.5 cm x 19.5 cm x 12.0 cm) mouse cage was fitted with a wire net tray with a mesh (1 cm x 1 cm), which divides the cage into an upper and a lower compartment. Mice born to females placed in the upper compartment pass through the mesh and fall into the lower compartment, where another lactating female with one or two of its own pups are. Of a total of 28 newborn mice of C3H/He and Swiss strains, 23 were successfully fostered. Important observations are presented to show that this is a valuable alternative for foster studies without great suffering on the part of the female.