Phaenocora sulfophila (Gilbert, 1938) Karling, 1956, (Gilbert, 1938) Karling, 1956

Houben, Albrecht M., Steenkiste, Niels Van & Artois, Tom J., 2014, Revision of Phaenocora Ehrenberg, 1836 (Rhabditophora, Typhloplanidae, Phaenocorinae) with the description of two new species, Zootaxa 3889 (3), pp. 301-354: 341

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Phaenocora sulfophila (Gilbert, 1938) Karling, 1956


Phaenocora sulfophila (Gilbert, 1938) Karling, 1956  

(Figs 11 B 1, B 2, 15 E)

Pseudophaenocora sulfophila Gilbert 1938: 193   –216, Figs 1–10 View FIGURE 1 ; Marcus 1946: 70 –72, 75, 164. Phaenocora (Pseudophaenocora) sulfophila Karling 1956: 195   , 200, Fig. 5 View FIGURE 5 p. 195.

Known distribution: near New Market (Virginia, USA), in a sulphur spring ( Gilbert 1938 a).

Material examined: None.

Diagnosis: Animals about 3.5–4.8 mm long, colourless with pigmented eyes. Zoochlorellae absent. Male copulatory organ of the duplex-type IA. Female genital system of the AGLOBULATA   - type. Large intestinal bursa communicates with the gut by means of a relatively long burso-intestinal duct. Genito-bursal duct relatively long. A large diverticulum, lined with a strong pseudocuticula and surrounded by a thick muscle layer, is connected to the superior genital atrium through its antero-dorsal wall. With tertiary lobes on the pear-shaped appendages.

Remarks: Initially, Gilbert (1938 a) placed Phaenocora sulfophila   in the monospecific genus Pseudophaenocora Gilbert, 1938   , mainly because he considered the male copulatory organ of this species to be fundamentally different from the copulatory organ of the other species of Phaenocora   . As discussed in the COMPARISON OF SPECIES section, we found the copulatory organ to be of the duplex type IA. Additionally, Gilbert (1938 a) mentioned four features that were only described for P. sulfophila   : presence of tertiary lobes on the pearshaped appendages, presence of the diverticulum connected to the superior genital atrium, presence of a ductus copulatorius (terminology of Gilbert 1938 a) with a high columnar epithelium, and presence of a large glandular papilla attached to the inferior genital atrium. However, the diagnostic value of some of these characters is uncertain. Tertiary lobes of the pear-shaped appendages were also described for P. evelinae   (although this is probably incorrect: see remarks on P. evelinae   ). Figure 3 of Beklemischev (1929) suggests the presence of a diverticulum in P. polycirra   (also Fig. 16 View FIGURE 16 F: div), which is situated at the anterio-ventral side, although he does not specifically mention this in the text. A large glandular papilla also occurs in P. clavigera   . The presence of a ductus copulatorius is typical for P. sulfophilla   . A high columnar epithelium borders the connection between the inferior and superior genital atria in P. anomalocoela   ( Fig. 2 B: cc), but this species lacks a genuine ductus copulatorius. Typical of P. sulfophila   is the short and slender female genital canal, which is widest in the middle. In all other species the female genital canal is widest at the junction with the superior genital atrium.














Phaenocora sulfophila (Gilbert, 1938) Karling, 1956

Houben, Albrecht M., Steenkiste, Niels Van & Artois, Tom J. 2014

Pseudophaenocora sulfophila

Karling 1956: 195
Marcus 1946: 70