Cephalachorutes judithae Shveenkova 2017, n. sp.
Creators: name: Shveenkova, Yulia B.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Neanuridae
Cephalachorutes
Cephalachorutes judithae

description: Cephalachorutes judithae n. sp.   
(Figs 4, 5)  
 TYPE MATERIAL. — Holotype. ♂, Southern Vietnam, Province Dong Nai, Cat Tien National Park, 12.XI.2005, deciduous forest of Lagerstroemia calyculata, soil, c. 149 m a.s.l., Yu. Shveenkova leg.; deposited in MSPU.   
 Paratypes. 1 ♀ juv., same data as holotype, 1 ♀, same data as holotype, but 11.XI.2005, 1 ♀, same data as holotype, but forest of Dipterocarpus alatus on a basalt ridge, 18.XI.2005.   
 Other material. 2 juv., same data as holotype, 1 juv., same data as holotype, but bamboo thickets, 17.XII.2005, 1♀, same data as holotype, but forest of Afzelia xylocarpa, 17.XII.2005. 1 paratype ♀ juv. deposited in MSPU, 2 paratypes ♀♀ deposited in MNHN.   
DIAGNOSIS. — Color white, without pigmentation and eyes. Ssensilla on Ant. IV: S1-S3 slightly stout and rather short, ms slightly longer (developed as S-sensilla); S8, S4, S7 relatively longer. S4 and S7 much thicker than other S-sensilla. S-sensilla of Ant. III: S2 and S5 subequal to ms on Ant. IV. S2 two times longer than S3-4 (so S3, S4 are relatively large). A2 absent on all tergites, p2 absent on Abd. IV. Dens with 5 + 5 chaetae.  
ETYMOLOGY. — The species is named in honor of Judith Najt, for her great contribution to systematics of Neanuridae, including tropical groups of species.  
DESCRIPTION  
 General   
Holotype 570 µm, paratype (♀ juv.) 620 µm. Color white, without pigmentation. Integumentary secondary granulation developed. Eyes absent.  
 Antennae   
Ant. IV and Ant. III almost fused dorsally (Fig. 4B). Ant. IV with apical papilla reduced and fused with the apex; subapical organite in ventro-apical position (Fig. 4C). Seven well developed, thickened S-sensilla on Ant. IV. S1-S3 slightly stout and rather short, ms slightly longer (developed as Ssensilla); S8, S4, S7 relatively longer. S4 and S7 much thicker than other S-sensilla. Sensory organ of Ant. III with ventral guard S-sensilla (S2), 2 rod-like internal S-microchaeta (S3-4), ventral S-microchaeta (S1) and dorsal guard S-sensilla (S5, shifted apically towards S8 of Ant. IV). Sensilla S2 and S5 subequal to ms on Ant. IV. S2 two times longer than S3-4 (so S3, S4 are relatively large). Ant. I and Ant. II with 7 and 11 chaetae respectively.  
 Mouthparts   
Mouthparts typical for the genus (Fig. 5C). Mandible long and thin with 2 strong basal teeth, 7 very small or some larger and 2 apical bigger. Labium typical for the genus (Fig. 5A).  
 Chaetotaxy   
 Head without chaetae a0 and c3 (Fig. 4A). Body chaetom composed of small normal chaetae and long sensory S-chaetae, ratio c. 1:(3-4). Number of S-chaetae on tergites corresponding to standard hypogastrurian pattern (2 + ms, 2/1,1,1,1,1 on each half-tergite from Th. II to Abd. V). Th. I with 2 chaetae on each side. Th. II-III with 3 + S dorso-external chaetae. Th. II-Abd. III with 3 dorso-internal chaetae. A2 absent on all tergites, p2 absent on Abd. IV. On Abd. I 2 + 2 or 1 + 1 chaetae between sensory S-chaetae (chaetae a1 present in some specimens on one side). Tibiotarsus without M-chaetae (7 + 11, 7+ 11, 6 +11 chaetae) (Fig. 5D). Subcoxa with 1, 2, 2 chaetae.   
 Abdominal appendages   
VT with 3+ 3 chaetae. Furcula well developed, tenaculum with 3+3 teeth, dens with 5+5 chaetae (Fig. 5B). Dens about two times longer than mucro.  
REMARKS  
 Cephalachorutes judithae n. sp. has no eye. Other blind species have six (vs five in C. judithae n. sp.) chaetae on dens (C. caecus Bedos & Deharveng, 1991 and C. centurionis Bedos & Deharveng, 1991) or tenaculum and furca completely absent (C. anneae Queiroz & Mendonça, 2016). The mentioned species also have smaller S3 and S4-sensilla on antennal organ III: 4,5 (vs two in C. judithae n. sp.) times shorter than S2. Five chaetae on dens and large S3, S4-sensilla are shared with C. deharvengi Najt & Weiner, 1997, which clearly differs with 5+ 5 eyes and shorter Ssensilla on Ant. IV.
description: Published as part of Shveenkova, Yulia B., 2017, New Collembolan species of the genera Sensiphorura Rusek, 1976 (Pachytullbergiidae) and Cephalachorutes Bedos & Deharveng, 1991 (Neanuridae) from Southern Vietnam, pp. 75-85 in Zoosystema 39 (1) on pages 82-84, DOI: 10.5252/z2017n1a9, http://zenodo.org/record/5089012