Petalotricha
Petalotricha Kent, 1882
[ref. ID; 3597]
Lorica bag-shaped or conical; with an oral shelf spreading out and a low flaring collar; oral margin entire or serrated; collar divided by a nuchal constriction and an inner nuchal ledge from the main part; bowl globose or baggy; aboral end rounded, conical, or with a trace of pointing; wall usually single-layered, generally with two kinds of fenestrae, of which the suboral oblong ones form a single row and subnuchal spherical or elliptical ones are scattered in a zone. (ref. ID; 3597)
Type species; Petalotricha ampulla (Fol) Kent (ref. ID; 3597)
- Petalotricha ampulla (Fol) Kent (ref. ID; 1940)
- Petalotricha capsa Brandt (ref. ID; 3597)
- Petalotricha major Jorgensen (ref. ID; 4046)
- Petalotricha pacifica Kofoid & Campbell (ref. ID; 3597)
- Petalotricha serrata (ref. ID; 3319)
Descriptions
The lorica is a hyaline, distinctively globose bowl with a wide, flat, almost horizontal oral rim that is wavy and uneven. Large fenestrae are randomly spaced in band around the middle of the bowl. (ref. ID; 4046)
Measurements
The dimensions of the lorica are: width of bowl 82, width at rim 100 um (no length measurements taken) (n=1). (ref. ID; 4046)
Descriptions
Lorica stout bag-like, 0.84 oral diameter in length; oral margin irregularly serrated; oral shelf length (48 degrees), with four waves; collar 0.2 of the total length in height including a shelf, forming a low funnel (40 degrees); nuchal constriction distinct, 0.94 oral diameter; a single row of elliptical spots appearing at the conjunction of the collar and the oral shelf; bowl shallow cup-shaped, with numerous small circular fenestrae in its anterior region; aboral end broadly rounded; wall composed of a single layer. (ref. ID; 3597)
Comments
The species differs from P. capsa Brandt in its stouter proportions. (ref. ID; 3597)
Measurements
Length 92; oral diameter 110 um. (ref. ID; 3597)