Lophoturus humphreysi, Duy-Jacquemin, 2014

Nguyen Duy-Jacquemin, Monique, 2014, Two new species of Lophoturus (Diplopoda, Penicillata, Lophoproctidae) from caves in Christmas Island, Australia, including the second troglomorph in Penicillata, Zoosystema 36 (1), pp. 29-39 : 35-38

publication ID	https://doi.org/ 10.5252/z2014n1a2
persistent identifier	https://treatment.plazi.org/id/03ABB939-9120-E34E-FBDD-FB04FEE0589F
treatment provided by	Felipe
scientific name	Lophoturus humphreysi
status	sp. nov.

Treatment

Lophoturus humphreysi n. sp.

( Figs 3 View FIG , 4 View FIG )

TYPE MATERIAL. — Holotype: adult male from Australia, Christmas Island, 19th Hole cave , located at – 10.425°, 105.701°:anchialine cave, t° 27-27.4°, humidity 98-99 %, BES-5921, 30.III.1998, W. F. Humphreys coll., WAM.

ETYMOLOGY. — This species is named after its collector, Dr W. F. Humphreys (Senior Curator, Western Australian Museum).

DIAGNOSIS

Anterior sensilla basiconica of antennal articles VI and VII shorter and slightly thinner than others. Labrum clothed with small cuticular setae and 2+3 lamellar processes on anteromedian margin. Trichomes of each tergite grouped into two, separate, oval clusters with an additional posterior row barely subdivided in its middle, except on collum and tergite X; distance between clusters much greater than length of each cluster. Pubescent oval setae on leg articles, except tibia and tarsus. Spine of tarsus II subequal in length to the telotarsus on posterior legs. Claw with one small sternal denticle. Apical part of tarsus II with 2 rows of cuticular setae that are longer and more spaced than the other setae.

DESCRIPTION OF ADULT MALE

Measurements

Body length (without caudal pencil): 3.60 mm. Length of caudal penicil 0.60 mm.Tarsus II length of 1st leg 180 µm, of 13th leg 240 µm.

Head

Anophthalmic. Vertex with a pair of posterior tufts, each arranged in 2 rows, anterior right row of 23 and left of 22 trichomes; posterior right row of 2 and left of 3 trichomes. Distance between each tuft about equal to their length ( Fig. 3F View FIG ).

Length and diameter of the antennal articles as represented in Fig. 3A View FIG ; length/diameter ratio of article VI about 1.90 ( Table 2). Article VI with 3 sensilla basiconica ( Fig. 3C, D View FIG ), the an- terior (a) more distal, shorter and slightly thinner than the 2 others, intermediate (i) slightly longer than the posterior (p); one sensillum coeloconicum (c) near the posterior sensillum (p), but more distal. Antennal article VII with 2 dorsal sensilla basiconica, the anterior sensil- lum, more distal slightly thinner and shorter (1/2) than the posterior; sensillum coeloconicum (c) near the posterior sensillum (p), but more distal ( Fig. 3B, E View FIG ).

Three trichobothria arranged triangularly, apex of anterior one slightly dilated and ending in a short spine-hair ( Fig. 3 View FIG [at]); the other 2 are very elongated ( Fig. 3 View FIG [pit]).

Labrum clothed with some small cuticular setae and 2+3 lamellar processes on antero-median margin ( Fig. 3I View FIG ); clypeo-labrum with fourteen short setae along the posterior margin.

Left palpus of gnathochilarium with 59 ( Fig. 3H View FIG ) and right with 56 sensilla.

Trunk

Trichomes of each tergite grouped into two, separate, oval clusters with an additional posterior row barely subdivided in its middle ( Fig. 4B View FIG ), except on collum ( Fig. 4A View FIG ) and tergite X; distance between clusters much greater than the length of each cluster. Collum with left tuft of 85 trichomes and right tuft of 89 trichomes; lateral left protuberance of collum with 11 trichomes and right with 12 trichomes ( Fig. 4A View FIG ). Each oval cluster of tergites II to VI with 43 to 54 trichomes and VII to IX with 36 to 41 trichomes; posterior row with 41 to 55 trichomes. Oval clusters of tergite X with 56 trichomes each (no posterior row).

Legs

Each leg article, except for tibia and tarsus, bearing pubescent oval setae extended by an acute process ( Fig. 4E, D View FIG ); coxae II to XIII bearing 4 to 6 setae ( Fig. 4C, D View FIG ), coxae I with 3 setae; trochanters with 2 setae ( Fig. 4 View FIG C-E) (except 1 seta on trochanters of legs I and V); prefemora with 2 setae (except 1 seta on leg I and III, 3 setae on right legs VII and X and left legs X and XIII); femora with 1 seta, very rarely 2 (on VIII femora); 1 small seta only on tibia of leg I. Telotarsus with 2 latero-dorsal, subequal denticles (ldd); a small, frayed, basal denticle (bd) is visible ventrally ( Fig. 4G View FIG ), as in all Lophoproctidae . Claw with one small sternal denticle (smd). Apical part of tarsus II with 2 rows of cuticular setae that are longer and more spaced than other setae ( Fig. 4G View FIG ).

Telson

Seven and 8 trichomes a, of which 6 and 7 placed on internal side and 2 on external side of the group of trichomes b-c1-c3. Trichomes of caudal pencil generally with 3 hooks.