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April 4, 2017 | Zoology | By admin | 0 Comments

By HG Bronns

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Die friihesten Anlagen dieser Opercula und 4. opisthosomalenSter- finden sich auf diesen Sterniten erst beim zweiten nits mit ihren deB2. Anhangen Larvenstadium in Gestalt je. eines (Genitalpapillen und Ruckerschen . 3. und Ventralsackchen des Paplllenpaares, von denen nur das erste m der 4. Sternits)(nach Rucker). Abb. 397, b vermerkt ist. Das zweite Papillenpaar (des 3. opisthosomalen Sternits) ist sehr winzig und wird von dem ersten Paar (des 2. opisthosomalen Sternits) iiberdeckt (Abb. 398, B).

397, a und 398, A) hat je ein medianes, leicht gegabeltes Gebilde, das Rucker zuerst fiir die Genitalopercula einer besonderen, sehr kleinen Art hielt und sie als Koenenia paroula beschrieb. Spater stellte sie fest, daB "each of the two appendages overlaps an aperture instead of surrounding the one orifice" und "these orifices were not openings for the emission of reproductive contents but through them the lung sacs were everted! Since there was no paired opening, as might be expected, these sacs were not paired, yet A their tips showed a bifurcated condition, which c' gave each sac the appearence of a pair of sacs Abb.

Segment als musculi longitudinales dorsales des Opisthosoma (mldo). Diese beiden Muskelbander setzen sich vom 1. opisthosomalen Segment in einem ebenfalls paarigen Muskel in das Prosoma fort, wo sie als musculi longitudinales des Prosoma unter dem von ihnen nicht beriihrten Metapeltidium hindurch an den Hinterrand des Propeltidium ansetzen (plm). Sie kontrahieren nicht nur die opisthosomalen Segmente, indem sie das Opisthosoma dorsalwarts emporbiegen, sondern auch den hinteren Teil des Prosoma derart, daB das Opisthosoma dorsalwarts gegen das Prosoma mehr oder minder nach vorn gekriimmt .

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