Monographis Attems, 1907

Huynh, Cuong, 2022, Four new species of Monographis Attems, 1907 (Diplopoda, Polyxenida, Polyxenidae) from Vietnam, Zootaxa 5214 (3), pp. 393-420 : 396-397

Genus Monographis Attems, 1907

Type species: Monographis kraepelini Attems, 1907 , by monotypy.

Monographis Attems, 1907 ; Nguyen Duy-Jacquemin and Condé, 1967: 43

Species included: The genus Monographis has eleven species and two subspecies have been described:

Monographis kraepelini Attems, 1907 , from Java, Indonesia;

Monographis annandalei ( Silvestri, 1948) from India;

Monographis mira ( Turk, 1947) from India;

Monographis tamoyoensis Condé and Nguyen Duy-Jacquemin, 1963 , from Brazil;

Monographis kraepelini malayanus Nguyen Duy-Jacquemin and Condé, 1966 , from Malaysia;

Monographis kraepelini sabahnus Condé and Nguyen Duy-Jacquemin, 1984 , from Malaysia;

Monographis baihualingensis Ishii and Yin, 2000 , from southern China;

Monographis yunnanensis Ishii and Yin, 2000 , from southern China;

Monographis queenslandica Huynh and Veenstra, 2013 , from Australia;

Monographis demangei Nguyen Duy-Jacquemin and Condé, 1967 , from Vietnam;

Monographis dongnaiensis Huynh and Veenstra, 2015 , from Vietnam;

Monographis phuquocensis Huynh and Veenstra, 2018c , from Vietnam;

Monographis condorensis Huynh and Veenstra, 2020 , from Vietnam.

Generic diagnosis: Each eye 8 ommatidia. Body with 10 tergites, 9 pleural projections, a caudal bundle present. 13 pairs of legs. 8 antennal articles, VI longest, VIII shortest with 4 sensory cones, all typical characteristics of Polyxenidae . Antennal article VI with 3–5 thick bacilliform sensilla among 12–24 thin bacilliform sensilla, sensilla located in anterior position longer than posterior ones, arranged into a simple crescent or triangle. A row of backward-pointing minute setae located along posterior margin of labrum. Anterior margin of labrum with acute triangular shape setae or slender setae. Lateral palp of gnathochilarium with 11 conical sensilla and 1.25 times longer than medial palp. Spine on tarsus 1 and 2. Coxal glands on coxae 8th and 9th.

Colouration: Live Monographis specimens are commonly yellowish brown in colour and darker on the lateroposterior rosette trichomes, which form 2 dark lateral bands contrasting with a light-yellow medial band. Eyes are bright red with two black horizontal bands apparent in the vertex area, which distinguishes the head from the rest of the animal. The last tergite is darkest in colour and extended into the telson region. The caudal bundle trichomes form light silvery bands near the base. The ventral side of the body is white in colour ( Figure 2 ).

Figures

FIGURE 2. Live specimen of Monographis thatsonensis sp. n., its appearance is typical of Monographis species (Diplopoda, Polyxenida)—commonly yellowish brown in colour, darker on the latero-posterior rosette trichomes, forming two dark lateral bands contrasting with a light-yellow medial band.