Alloproctoides Marquet and Condé, 1950

Huynh, Cuong, 2020, Three new species of penicillate millipedes from the Con Dao Islands of southeast Vietnam (Diplopoda, Lophoproctidae and Polyxenidae), Zootaxa 4759 (1), pp. 1-30 : 2

Genus Alloproctoides Marquet and Condé, 1950

Type species: Alloproctoides dawydoffi ( Attems, 1938) ;

Monographis kraepelini dawydoffi Attems, 1938 .

Other taxa included:

Alloproctoides remyi Marquet and Condé, 1950 ;

Alloproctoides xenochilus Nguyen Duy-Jacquemin and Condé, 1982 ;

Alloproctoides dawydoffi sineligulatus Nguyen Duy-Jacquemin and Condé, 1982 ;

Alloproctoides consonensis n. sp.

All members in Lophoproctidae are characterised by the absence of eyes, the morphology of antennomeres VII and VIII (being of equal length), 4 sensory cones reduced in size and simple claws. Ishii et al. (1999) provided a key to the 5 genera in Lophoproctidae based on the labrum structure and the number of sensilla on the antennomere VI. Five genera of the family are: Alloproctoides Marquet and Condé, 1950 ; Ancistroxenus Schubart, 1947 ; Lophoproctinus Silvestri, 1948 ; Lophoproctus Pocock, 1894 ; and Lophoturus Brolemann, 1931 . Members from genus Alloproctoides are characterised by 0 or 1 pair of linguiform processes at the median cleft of labrum, and antennomere VI with 2 long thick bacilliform sensilla and 3–10 short thin bacilliform sensilla.

Genus diagnosis: Ommatidia absent. 13 pairs of legs. Body with 10 tergites, 9 pleural projections ( Figs. 4A and 4B ). Antennomere VI longest, VII and VIII equal length. 4 sensory cones reduced in size ( Fig. 5A ). Antennomere VI with conical sensillum located in posterior position, with 2 long thick bacilliform sensilla, and 3–5 short thin bacilliform sensilla located transversely ( Fig. 5 ). Coxal gland absent. Leg claw simple. Pair of linguiform processes at median cleft of labrum, or absent ( Fig. 4D ).

Figures

FIGURE 4. SEM images of Alloproctoides consonensis n. sp., A. Dorsal view of the head capsule, showing the vertex area (V), the posterior vertex trichomes group (pv), the trichobothria (tr); co: collum, the lateral protuberance (Lp); T2: tergite 2 and the associated pleural projections (pp), the medial gap (mg); B. Ventral view; C. Trichobothria a, b and c: Trichobothrium b, largest socket located closest to the edge of the head capsule in lateral position, trichobothrium a, medium size socket located furthest from the edge of head capsule, trichobothrium c, smallest socket located anterior to sockets a and b; D. Clypeo-labrum showed the setose surface and a pair of linguiform process (lp), E. Gnathochilarium in male showing 45 sensilla on the medial palp (some sensilla missing, the total numbers usually 56–58); F. Gnathochilarium in female with 18 sensilla.

FIGURE 5. Holotype Alloproctoides consonensis n. sp., A. Antennomeres VI, VII and VIII with 4 reduced sensory cones (sc), showed the arrangement of sensilla on antennomeres VI and VII; B. Sensilla on antennomere VII: Two long thick bacilliform sensilla (T), Ta—shorter (anterior) and Tp (posterior), setiform sensillum (s) between them and a conical sensilla (c) located in posterior position; C. Sensilla on antennomere VI: Two long thick bacilliform sensilla (Ta and Tp), a conical sensillum (c) located in posterior position. Four short thin bacilliform sensilla (st) located on an acute angle near Ta. (Arrows indicated sensilla from B (article VII) and from C (article VI))