Camacolaimus roebergensis Allgén, 1933

Holovachov, Oleksandr & Boström, Sven, 2015, Swedish Plectida (Nematoda). Part 10. The genus Deontolaimus de Man, 1880, Zootaxa 4034 (1), pp. 1-44 : 34-35

Camacolaimus roebergensis Allgén, 1933

( Fig. 20 )

Type material. Lectotype juvenile (slide # Type-8742) deposited in the invertebrate type collection of the Department of Zoology, Swedish Museum of Natural History, Stockholm, Sweden. Specimen is partly dried out and is in poor condition.

Juvenile. Body slender, cylindrical over most of its length, tapering anteriorly in anterior half of pharyngeal region and posteriorly on tail; ventrally curved upon fixation. Cuticle annulated. Lateral field present. Body pores, epidermal glands and subcephalic, cervical and somatic sensilla cannot be observed. Labial region rounded, continuous with body contour. Inner and outer labial, and cephalic sensilla indistinct. Amphid indistinct. Ocelli absent. Nerve ring, hemizonid and secretory-excretory system cannot be observed. Oral opening terminal. Onchiostyle relatively long and robust, with its tip strongly sclerotized. Pharynx cylindrical anteriorly, expanding posteriorly. Reproductive system undeveloped. Caudal glands indistinct. Spinneret sharply separated from the tail, acute and strongly sclerotized.

Discussion. Studied specimen resembles Procamacolaimus profundus Vitiello, 1974 (species commonly found in our samples from Skagerrak) in the shape of onchiostyle and spinneret. However, it is impossible to be sure that both species are identical without having males of Camacolaimus roebergensis . It is considered species inquirenda et incerta sedis within the family Camacolaimidae .

Figures

FIGURE 20. Camacolaimus roebergensis Allgén, 1933, lectotype female. A: Anterior end; B: Tail, C: Entire female. Scale bars: A – B = 10 µm, C = 50 µm.