Microplana nana Mateos, Giribet and Carranza, 1998
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publication ID |
https://doi.org/ 10.1080/00222933.2010.536267 |
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DOI |
https://doi.org/10.5281/zenodo.10536973 |
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persistent identifier |
https://treatment.plazi.org/id/03E687FA-FFFA-BC1A-FE11-FC90FBE1FF51 |
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treatment provided by |
Felipe |
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scientific name |
Microplana nana Mateos, Giribet and Carranza, 1998 |
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Microplana nana Mateos, Giribet and Carranza, 1998 View in CoL
( Figures 1 View Figure 1 , 7 View Figure 7 , Table 1)
Material examined
Holotype. NHML 1998.2 View Materials .9.1, sagittal sections of one specimen on three slides (labelled LA 2.1, 2.2, 2.3).
Paratype. NHML 1998.2 View Materials .9.2, sagittal sections of one specimen on two slides (labelled LA1.1, 1.2). For further details see Mateos et al. (1998) .
Description
For details of external features, epidermis, musculature, nervous system and alimentary system, see Mateos et al. (1998).
Testes as described by Mateos et al. (1998), discharge into sperm ducts (vasa deferentia), which run posteriorly to copulatory apparatus. Sperm ducts not readily discernable in sections but must be very narrow. (Duct labelled “D” on fig. 5 of Mateos et al. 1998, is ovovitelline duct, not sperm duct.) Anterior to copulatory apparatus, each sperm duct expands to about 40 µm in diameter and forms a sperm storage structure (spermiducal vesicle) on either side. They then narrow (duct is occluded but visible over most of its length, but appears to be about 2.5 µm in diameter) and separately enter penis bulb. Penis with basal diameter about 170–200 µm and total (retracted) length about 450 µm. In both specimens, the distal end, about 150 µm, is reflected with diameter about 40 µm. Sperm ducts discharge separately but close together into anterior end of ejaculatory duct. Ejaculatory duct eccentric, in ventral half of penis, maximum diameter about 50 µm, lined with tall columnar cells, about 5 µm diameter in distal, reflected, portion.
Ovaries, oviducts and vitellaria as described by Mateos et al. (1998). Oviducts extend posterior to penis and converge to separately join posterior extremity of female genital duct. Duct short, about 50 µm long and Y-shaped. Base of Y opens into posterior of atrium, each upper arm of the Y receiving one ovovitelline duct. Narrow genito-intestinal duct ( Figure 7 View Figure 7 ) runs dorsally from female genital duct to branch of intestine. Many eosinophilic glands, presumably “shell gland” secreting the cocoon material, surround region around female genital duct.
Discussion
The type material has been re-examined because details of the copulatory apparatus differ from the description and diagram given by Mateos et al. (1998: fig. 2) and accordingly the species is partially re-described above, as far as is necessary to correct the details.
The differences between the description of Mateos et al. (1998) and the present description are as follows. First, the sperm ducts enter the penis separately and remain separate in the base of the penis until they discharge separately into the ejaculatory duct. They are shown in fig. 2 of Mateos et al. (1998) fusing before entering the penis bulb and discharging into the ejaculatory duct as a single duct. Second, the female genital duct is about 50 µm long, whereas it is shown as about 300 µm long in fig. 2 of Mateos et al. (1998). Third, there is a genito-intestinal duct running dorsally from the female genital duct. This was stated to be absent by Mateos et al. (1998).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.