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'''''Porcellio formosus''''' is a species of [[woodlouse]] in the genus ''[[Porcellio]]'' belonging to the family [[Porcellionidae]] that can be found in [[San Pedro, Los Angeles, California|San Pedro]] and [[San Francisco]] of [[California]].
'''''Porcellio formosus''''' is a species of [[woodlouse]] in the genus ''[[Porcellio]]'' belonging to the family [[Porcellionidae]] that can be found in [[San Pedro, Los Angeles, California|San Pedro]] and [[San Francisco]] of [[California]].


==Description==
==Description==
The species are {{convert|13|x|6|mm}} high and wide, with the [[antenna (biology)|antennae]] segments are as long as {{convert|6|mm}}. Their [[Taenia coli|longitudinal band]] is grayish-white, and have a series of spots which are of the same colour. The body is ovate, with a long, shining, and smooth convex. The eyes are oval shaped, prominent, and have lots of [[ocelli]]. The little developed median frontal lobe is rounded. The drawn out lateral lobes are equal in lengh and width of the eyes or the face. Both [[epimera]], posterior margin, posterior angles, and the first three segments of the [[thorax]] are straight. The fifth, sixth, and seventh segments are bend backwords. The [[Semicircle|semicircular]] [[abdomen]] of the fifth segment is wide, while epimera on the parts three, four, and five are quite large, but still bent backward. The seventh segment is triangular in shape, and is wide and long.<ref name=google>{{cite book|url=http://books.google.com/books?id=BPHRAAAAMAAJ&pg=PA613&lpg=PA613&dq=Porcellio+ovalis&source=bl&ots=fG19Mh3gDf&sig=8txM2B7L4V-UgdBCJH9ZzDCj5Wc&hl=en&sa=X&ei=YROxUM2iIqiVyQG4yoDYCw&ved=0CCsQ6AEwADgU#v=onepage&q=Porcellio%20ovalis&f=false|author=Harriet Richardson, Harriet Richardson Searle|title=A monograph on the isopods of North America|pages=612-613|format=[[Portable Document Format|PDF]]}}</ref>
The species are {{convert|13|x|6|mm}} high and wide, with the [[antenna (biology)|antennae]] segments are as long as {{convert|6|mm}}. Their [[Taenia coli|longitudinal band]] is grayish-white, and have a series of spots which are of the same colour. The body is ovate, with a long, shining, and smooth convex. The eyes are oval shaped, prominent, and have lots of [[ocelli]]. The little developed median frontal lobe is rounded. The drawn out lateral lobes are equal in length and width of the eyes or the face. Both [[epimera]], posterior margin, posterior angles, and the first three segments of the [[thorax]] are straight. The fifth, sixth, and seventh segments are bend backwords. The [[Semicircle|semicircular]] [[abdomen]] of the fifth segment is wide, while epimera on the parts three, four, and five are quite large, but still bent backward. The seventh segment is triangular in shape, and is wide and long.<ref name=google>{{cite book|url=http://books.google.com/books?id=BPHRAAAAMAAJ&pg=PA613&lpg=PA613&dq=Porcellio+ovalis&source=bl&ots=fG19Mh3gDf&sig=8txM2B7L4V-UgdBCJH9ZzDCj5Wc&hl=en&sa=X&ei=YROxUM2iIqiVyQG4yoDYCw&ved=0CCsQ6AEwADgU#v=onepage&q=Porcellio%20ovalis&f=false|author=Harriet Richardson, Harriet Richardson Searle|title=A monograph on the isopods of North America|pages=612–613|format=[[Portable Document Format|PDF]]}}</ref>


The species also have a wide, and acuminate [[apex (mollusc)|apex]], which also have a broad longitudinal excavation which is located above the apex. The basal part of the uropoda can be seen from below, with the convex being always above. The dorsal part is dark greyish-red in colour, and have a lot of irregular and pale coloured oblong spots. The spots are mixed and are arranged in two lines, which are devided by an interval. The colour of abdomen is the same as the rest of the body, and are either bi-punctate or tri-punctate at the base.<ref name=google/>
The species also have a wide, and acuminate [[apex (mollusc)|apex]], which also have a broad longitudinal excavation which is located above the apex. The basal part of the uropoda can be seen from below, with the convex being always above. The dorsal part is dark greyish-red in colour, and have a lot of irregular and pale coloured oblong spots. The spots are mixed and are arranged in two lines, which are divided by an interval. The colour of abdomen is the same as the rest of the body, and are either bi-punctate or tri-punctate at the base.<ref name=google/>


==References==
==References==

Revision as of 06:49, 25 July 2013

Porcellio formosus
Scientific classification
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Genus:
Species:
P. formosus
Binomial name
Porcellio formosus
Stuxberg, 1875

Porcellio formosus is a species of woodlouse in the genus Porcellio belonging to the family Porcellionidae that can be found in San Pedro and San Francisco of California.

Description

The species are 13 by 6 millimetres (0.51 in × 0.24 in) high and wide, with the antennae segments are as long as 6 millimetres (0.24 in). Their longitudinal band is grayish-white, and have a series of spots which are of the same colour. The body is ovate, with a long, shining, and smooth convex. The eyes are oval shaped, prominent, and have lots of ocelli. The little developed median frontal lobe is rounded. The drawn out lateral lobes are equal in length and width of the eyes or the face. Both epimera, posterior margin, posterior angles, and the first three segments of the thorax are straight. The fifth, sixth, and seventh segments are bend backwords. The semicircular abdomen of the fifth segment is wide, while epimera on the parts three, four, and five are quite large, but still bent backward. The seventh segment is triangular in shape, and is wide and long.[1]

The species also have a wide, and acuminate apex, which also have a broad longitudinal excavation which is located above the apex. The basal part of the uropoda can be seen from below, with the convex being always above. The dorsal part is dark greyish-red in colour, and have a lot of irregular and pale coloured oblong spots. The spots are mixed and are arranged in two lines, which are divided by an interval. The colour of abdomen is the same as the rest of the body, and are either bi-punctate or tri-punctate at the base.[1]

References

  1. ^ a b Harriet Richardson, Harriet Richardson Searle. A monograph on the isopods of North America (PDF). pp. 612–613.