Americanura belicensis, Palacios-Vargas & Mejia-Recamier & Vázquez, 2017

Palacios-Vargas, José G., Mejia-Recamier, Blanca E. & Vázquez, M. Magdalena, 2017, Two new species of Americanura (Collembola: Neanuridae) from Belize, Central America, Florida Entomologist 100 (2), pp. 310-310 : 310

Americanura belicensis sp. nov. ( Figs. 1–3 )

TYPE MATERIAL

HOLOTYPE female: One paratype female and 1 preadult. All the type material will be kept at senior authors’ institution. Type Locality: BELIZE, Chikibul National Park, ex litter, 12 Nov 1998, ex litter, col. M. Vázquez, H. Klompen, C. Chargoy.

1 Universidad Nacional Autónoma de México, Facultad de Ciencias , Depto. Ecología y Recursos Naturales, Laboratorio de Ecología y Sistemática de Microartrópodos, Ciudad de México, Coyoacán 04510, México D.F.; E-mail: [e-mail] (J. G. P. - V.), [e-mail] (B. E. M. - R.) 2 University of Quintana Roo, División de Ciencias e Ingenierías, Chetumal, Quintana Roo, México; E-mail: [e-mail] (M. M. V.)

DESCRIPTION

Length 1.6 mm (range 1.1–1.9 mm; n = 3). Color white in alcohol. Granulations fine, about half size of 1 eye. Tubercles well developed, both cephalic tubercles B coalesce, and those of Abd IV, De, DL and L fused. Head seta F long (128 µm). Four kinds of body setae, long and heavy BM (on Di tubercle / Th II, III; Abd I and IV) 153, 155; 160 and 148 µm; bme (on Di tubercle / Th II, III; Abd I and IV) 43, 46; 56, 53µm, and M 151 µm (range 133–155 µm), with few barbulations, almost smooth, inserted near ss, which is around 100 µm long ( Fig. 1 ).

Ant I with 7 setae, 3 are dorsal BM, Ant II with 11 setae, 1 dor- sal barbulated seta. Ant III sensorial organ with 2 globular sensilla in a cuticular fold, and 2 guard sensilla. Sgd straight, shorter than Sgv, 1 microsensillum ventro-external. Ant IV typical for the genus ( Fig. 3 ) with sensillum S7 hypertrofied, and S1, S2 and S5 thinner and shorter than others.

Eyes 2 + 2 with dark pigment. Setae Ocm and Ocp long (131 µm). Mandibles with 3 teeth, maxillae styliform. Head with tubercles well developed, chaetotaxy as in Fig. 1 and Table 1.

Tibiotarsi I, II, and III without tenent hairs, with 18, 18, and 17 se- tae, respectively. Thoracic and abdominal chaetotaxy as in Figs. 1 and 2 . Total chaetotaxy as in Tables 1 and 2.

Ventral tube with 4 + 4 setae, 2 anterior distal setae subequal in size, 2 posterior setae different, 1 larger. Female genital plate with 3 + 3 pregenital setae, 20–23 circumgenital, 2 eugenital setae. Furcal vestige without microsetae.

ETYMOLOGY

Species is named afer the country Belize, the type locality .

REMARKS

Americanura belicensis sp. nov. has long barbulate setae and the

Di setae formula 033/2222, lacks cephalic setae “A,” has 2 ocular setae and is unique for the fusion of DL and L tubercles on Abd III and IV. In addition, it only has 1 seta between the ss of Abd V. Thirteen other forms share the chaetotaxy of Th I Di on Th II to III with the new spe- cies. The head cheatotaxy of Americaura belicensis sp. nov. is similar to A. palaciosi Paniagua Nucamendi, 2012 from Turrialba, Costa Rica. The most evident difference between both species is A. belicensis sp. nov. lacks cephalic setae “A” and tubercle Di on Abd V carries 1 seta, whereas A. palaciosi bears 2 setae. Variation: On Th II tubercle De, asymmetrically, 1 bifid seta.

Figures

Figs. 1–3. Americanura belicensis sp. nov. 1, antennal dorsal chaetotaxy; 2, head and thorax chaetotaxy; 3, abdominal chaetotaxy.