Doryphoribius neglectus , Pilato, Giovanni & Lisi, Oscar, 2004

Pilato, Giovanni & Lisi, Oscar, 2004, Doryphoribius neglectus sp. n. and Parascon nichollsae sp. n., new species of eutardigrades from Australia, Zootaxa 545, pp. 1-7: 2-4

publication ID

10.5281/zenodo.157549

publication LSID

lsid:zoobank.org:pub:E59FE385-2FBE-46CE-97BD-E67D37D2C424

persistent identifier

http://treatment.plazi.org/id/F24787DB-FFFC-FF80-FE80-204CA13AE644

treatment provided by

Plazi

scientific name

Doryphoribius neglectus
status

sp. n.

Doryphoribius neglectus  sp. n. ( Fig. 1 View Figure . A­E)

Description of the holotype: Body length 308.0 µm ( Fig. 1 A View Figure ) colorless, eyes not preserved (but we do no exclude their presence); cuticle smooth. Bucco­pharyngeal apparatus of Doryphoribius  type ( Fig. 1 B View Figure ). Mouth anterio­ventral without peribuccal lamellae and papulae; no teeth visible in the mouth cavity (but this character needs to be confirmed); buccal tube rigid with ventral lamina; stylet supports inserted on the buccal tube at 69.9 % of its length (pt = 69.9). Buccal tube 26.5 µm long, and 2.4 µm wide (pt = 9.1). Stylet furcae ( Fig. 1 B View Figure ) of a very peculiar shape, robust, triangular in shape, with the posterio­lateral processes rounded but not swollen. Pharyngeal bulb with small apophyses and two rodshaped macroplacoids, microplacoid absent. Entire row of placoids 9.4 µm long (pt = 35.5); first macroplacoid, with a central constriction, 5.5 µm long (pt = 20.8), second macroplacoid 3.7 µm long (pt = 14) without constriction.

Claws of Isohypsibius  type ( Fig. 1 View Figure D,E), slender, with a very short basal portion; external claws with slightly enlarged bases; main branches with very short and thin accessory points. External and internal claws 9.2 µm (pt = 34.7) and 6.9 µm (pt = 26.0) long respectively on the first pair of legs; 9.4 µm (pt = 35.5) and 7.3 µm (pt = 27.5) respectively on the second and third pairs of legs; anterior and posterior claws on fourth pair of legs as long as the internal and, respectively, the external claws, on the second and third pairs of legs. Lunules and other cuticular thickenings absent on all legs.

Eggs unknown.

Etymology: neglectus  = neglected.

Differential diagnosis: The new species differs from all species of the genus Doryphoribius  in the shape of the stylet furcae and perhaps it could be ascribed to a new genus, but since we have only one specimen, we temporarily attribute it to the genus Doryphoribius  . Etymology: neglectus  = neglected.

Only five species of the genus Doryphoribius  have unsculptured cuticle and two macroplacoids: D. evelinae ( Marcus, 1928)  , D. doryphorus ( Binda & Pilato, 1969)  , D. macrodon Binda, Pilato & Dastych 1980  , D. pilatoi Bertolani, 1984  and D. koreanus Moon, Kim & Bertolani, 1994  .

Besides, D. neglectus  differs from D. evelinae  in having legs without tubercles. It differs from D. doryphorus  in having buccal tube shorter with respect to the body length (in the holotype of D. neglectus  , 308 µm long, the buccal tube is 26.5 µm long (8.6 %), in specimens of D. doryphorus  202 µm long, the buccal tube is 23.7 µm long (11.7 %)), and claws with slightly shorter basal portion.

The new species differs from D. pilatoi  in having the claws of the fourth pair of legs not reduced.

It differs from D. macrodon  in having more slender claws with shorter basal portion, and less evident buccal armature (no teeth visible in the mouth cavity, but this character needs to be confirmed).

It differs from D. koreanus  in having claws with shorter basal portion, less evident buccal armature, (no teeth visible in the mouth cavity, but this character needs to be confirmed) and lacking of lunules.