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A peculiar cave species of Tomocerus (Collembola, Tomoceridae, Tomocerinae) from Vietnam, with a discussion of the postantennal organ and prelabral chaetae in Tomocerinae.

Yu D, Zhang F, Deharveng L - Zookeys (2014)

Bottom Line: Tomocerus postantennalis sp. n. differs from the other PAO-possessing tomocerid, Tomolonus reductus Mills, 1948, mainly in the morphology of PAO, the number of ocelli, the number of chaetae in trochantero-femoral organ and several features of the furca.Besides the presence of PAO, the new species is peculiar in having six prelabral chaetae, instead of four as in other Tomocerus species.The new species is similar to Tomocerus folsomi Denis, 1929 and Tomocerus ocreatus Denis, 1948 in the type of dental spines but different from them in the body colour, the relative length of antennae to body, the number of unguis inner teeth and the number of mucronal intermediate teeth.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Life Sciences, Nanjing University, Nanjing 210093, China.

ABSTRACT
The first Tomocerus species with a postantennal organ (PAO) in the adult stage is described from Vietnam. Tomocerus postantennalis sp. n. differs from the other PAO-possessing tomocerid, Tomolonus reductus Mills, 1948, mainly in the morphology of PAO, the number of ocelli, the number of chaetae in trochantero-femoral organ and several features of the furca. The new species is placed in Tomocerus because of the presence of a toothlet on the outer basal mucronal tooth and the absence of the diagnostic character states of Plutomurus Yosii, 1956 and Aphaenomurus Yosii, 1956. Besides the presence of PAO, the new species is peculiar in having six prelabral chaetae, instead of four as in other Tomocerus species. The new species is similar to Tomocerus folsomi Denis, 1929 and Tomocerus ocreatus Denis, 1948 in the type of dental spines but different from them in the body colour, the relative length of antennae to body, the number of unguis inner teeth and the number of mucronal intermediate teeth.

No MeSH data available.


Related in: MedlinePlus

Tomocerus postantennalis sp. n. 2 PAO and ocelli 3 cephalic dorsal chaetotaxy 4 labrum 5 mandible 6 maxillary lamella five 7 trochanteral-femoral organ 8 tibiotarsus 9 anterior view of distal tibiotarsal chaetae (t: tenent hair, a: accessory chaetae, g: guard chaetae) 10 claw 11 tenaculum. Scale bars: 2, 7, 9, 10, 11 = 50 μm; 3 = 500 μm; 4, 5, 8 = 100 μm; 6= 20 μm.
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Figure 2: Tomocerus postantennalis sp. n. 2 PAO and ocelli 3 cephalic dorsal chaetotaxy 4 labrum 5 mandible 6 maxillary lamella five 7 trochanteral-femoral organ 8 tibiotarsus 9 anterior view of distal tibiotarsal chaetae (t: tenent hair, a: accessory chaetae, g: guard chaetae) 10 claw 11 tenaculum. Scale bars: 2, 7, 9, 10, 11 = 50 μm; 3 = 500 μm; 4, 5, 8 = 100 μm; 6= 20 μm.

Mentions: The pattern of dorsal cephalic chaetotaxy used here is modified from that Wang et al. (2013): the two posterior macrochaetae placed in the postocular area by these authors (Figure 2F in Wang et al. 2013) are here considered to belong instead to the posterior area. We follow Fjellberg (2007) for maxilla lamellae numbering and Christiansen (1964) for macrochaetotaxy. The dental spine formula follows that of Folsom (1913), in which the dental spines are arranged from basal to distal, with a slash indicating the separation between basal and medial subsegments and the Roman numerals referring to spines that are noticeably larger.


A peculiar cave species of Tomocerus (Collembola, Tomoceridae, Tomocerinae) from Vietnam, with a discussion of the postantennal organ and prelabral chaetae in Tomocerinae.

Yu D, Zhang F, Deharveng L - Zookeys (2014)

Tomocerus postantennalis sp. n. 2 PAO and ocelli 3 cephalic dorsal chaetotaxy 4 labrum 5 mandible 6 maxillary lamella five 7 trochanteral-femoral organ 8 tibiotarsus 9 anterior view of distal tibiotarsal chaetae (t: tenent hair, a: accessory chaetae, g: guard chaetae) 10 claw 11 tenaculum. Scale bars: 2, 7, 9, 10, 11 = 50 μm; 3 = 500 μm; 4, 5, 8 = 100 μm; 6= 20 μm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4042826&req=5

Figure 2: Tomocerus postantennalis sp. n. 2 PAO and ocelli 3 cephalic dorsal chaetotaxy 4 labrum 5 mandible 6 maxillary lamella five 7 trochanteral-femoral organ 8 tibiotarsus 9 anterior view of distal tibiotarsal chaetae (t: tenent hair, a: accessory chaetae, g: guard chaetae) 10 claw 11 tenaculum. Scale bars: 2, 7, 9, 10, 11 = 50 μm; 3 = 500 μm; 4, 5, 8 = 100 μm; 6= 20 μm.
Mentions: The pattern of dorsal cephalic chaetotaxy used here is modified from that Wang et al. (2013): the two posterior macrochaetae placed in the postocular area by these authors (Figure 2F in Wang et al. 2013) are here considered to belong instead to the posterior area. We follow Fjellberg (2007) for maxilla lamellae numbering and Christiansen (1964) for macrochaetotaxy. The dental spine formula follows that of Folsom (1913), in which the dental spines are arranged from basal to distal, with a slash indicating the separation between basal and medial subsegments and the Roman numerals referring to spines that are noticeably larger.

Bottom Line: Tomocerus postantennalis sp. n. differs from the other PAO-possessing tomocerid, Tomolonus reductus Mills, 1948, mainly in the morphology of PAO, the number of ocelli, the number of chaetae in trochantero-femoral organ and several features of the furca.Besides the presence of PAO, the new species is peculiar in having six prelabral chaetae, instead of four as in other Tomocerus species.The new species is similar to Tomocerus folsomi Denis, 1929 and Tomocerus ocreatus Denis, 1948 in the type of dental spines but different from them in the body colour, the relative length of antennae to body, the number of unguis inner teeth and the number of mucronal intermediate teeth.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Life Sciences, Nanjing University, Nanjing 210093, China.

ABSTRACT
The first Tomocerus species with a postantennal organ (PAO) in the adult stage is described from Vietnam. Tomocerus postantennalis sp. n. differs from the other PAO-possessing tomocerid, Tomolonus reductus Mills, 1948, mainly in the morphology of PAO, the number of ocelli, the number of chaetae in trochantero-femoral organ and several features of the furca. The new species is placed in Tomocerus because of the presence of a toothlet on the outer basal mucronal tooth and the absence of the diagnostic character states of Plutomurus Yosii, 1956 and Aphaenomurus Yosii, 1956. Besides the presence of PAO, the new species is peculiar in having six prelabral chaetae, instead of four as in other Tomocerus species. The new species is similar to Tomocerus folsomi Denis, 1929 and Tomocerus ocreatus Denis, 1948 in the type of dental spines but different from them in the body colour, the relative length of antennae to body, the number of unguis inner teeth and the number of mucronal intermediate teeth.

No MeSH data available.


Related in: MedlinePlus