Camacolaimus papillosus Allgén, 1950

Holovachov, Oleksandr & Boström, Sven, 2015, Swedish Plectida (Nematoda). Part 10. The genus Deontolaimus de Man, 1880, Zootaxa 4034 (1), pp. 1-44 : 32-34

Camacolaimus papillosus Allgén, 1950

( Fig. 18 )

Type material. Lectotype male (slide # Type-8744) and paralectotype male (slide # Type-8743) deposited in the invertebrate type collection of the Department of Zoology, Swedish Museum of Natural History, Stockholm, Sweden. One male specimen is in relatively good condition with larger structures recognizable, the other male is partially dried out and is in poor condition.

Male. Body slender, cylindrical over most of its length, tapering anteriorly in anterior half of pharyngeal region and posteriorly on tail; variously curved upon fixation. Cuticle finely annulated; annules without ornamentation. Lateral field visible only on tail. Body pores, epidermal glands and subcephalic, cervical and somatic sensilla cannot be observed. Labial region rounded, continuous with body contour. Inner and outer labial sensilla indistinct. Cephalic sensilla setiform. Amphidial fovea ventrally-unispiral, located just anterior to cephalic sensilla bases. Ocelli absent. Nerve ring and hemizonid indistinct. Secretory-excretory system present, but only excretory pore recognizable—it opens to exterior on ventral side, at around midpharynx. Oral opening terminal. Buccal cavity uniformly tubular: cheilostom barrel-shaped; stegostom tubular, with large dorsal onchiostyle. Onchiostyle with acute tip and subcylindrical body. Pharynx muscular, cylindrical anteriorly, expanding posteriorly; not subdivided into sections; without bulbs; valvular apparatus absent. Pharyngeal glands and cardia indistinct. Reproductive system diorchic, both testes outstretched. Spicules paired, symmetrical, with arcuate shaft and small manubrium; manubrium is ventrally inclined. Gubernaculum present, small, plate-like, with dorsal apophysis. Alveolar supplements present, 26 in lectotype male, located along the pharyngeal region from level of the buccal cavity to level of pharyngo-intestinal junction. Tubular supplements absent. Precloacal and postcloacal sensilla indistinct. Tail conoid, ventrally curved. Caudal glands and spinneret present.

Discussion. The species is rightfully synonymized with Deontolaimus papillatus de Man, 1880 —it agrees with D. papillatus in both qualitative and quantitative characters.

Figures

FIGURE 18. Camacolaimus papillosus Allgén, 1950, lectotype male. A – B: Anterior end at different focal planes; C: Tail; D: Entire male. Scale bars: A – C = 10 µm, D = 50 µm.