Camacolaimus propinquus Allgén, 1929

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

Camacolaimus propinquus Allgén, 1929

( Fig. 19 )

Type material. Lectotype female (slide # Type-3381) 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.

Female. Body slender, fusiform over most of its length, tapering anteriorly in anterior half of pharyngeal region and posteriorly on tail; strongly ventrally curved upon fixation. Cuticle annulated. Lateral field, 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. Pharynx cylindrical anteriorly, expanding posteriorly; with strongly expanded dorsal glandular sector. Reproductive system didelphic, amphidelphic; ovary branches reflexed antidromously. Vagina straight. Epiptygmata and pars refringens vaginae absent. Rectum short. Tail elongateconoid, ventrally curved. Spinneret acute, straight.

Discussion. Description and illustrations of this species superficially match the diagnosis of the family Camacolaimidae (in particular the genera Deontolaimus and Procamacolaimus in having a single dorsal onchiostyle and a paired female reproductive system). Absence of males prevents from more precise identification of this species. It cannot be matched to any of the recently discovered Swedish populations of the genus Deontolaimus . It is considered species inquirenda et incerta sedis within the family Camacolaimidae .

Figures

FIGURE 19. Camacolaimus propinquus Allgén, 1929, lectotype female. Scale bar: 50 µm.