Anelpistina taninuli, Espinasa & Bartolo & Sloat, 2015

Espinasa, Luis, Bartolo, Nicole D. & Sloat, Solomon, 2015, A new epigean species of the genus Anelpistina (Insecta: Zygentoma: Nicoletiidae) from Sierra de El Abra, Taninul, Mexico, European Journal of Taxonomy 156, pp. 1-7 : 3-6

Anelpistina taninuli sp. nov.

urn:lsid:zoobank.org:act:92B2522E-739D-43D6-922F-F24A6D314E22

Figs 1 A–I, 2A–I

Etymology

The species epithet, taninuli , refers to the locality, Taninul, where the species is found.

Material examined

Holotype

MEXICO:, 7.5 mm, Taninul Hotel , Highway Cd. Valles Tampico km 15, San Luis Potosi, Mexico, under rocks (21 o 56’15.20” N, 98 o 53’25.50’ W, 75 masl), 16. Mar. 2013, L. Espinasa, A. Cahill and M. Yurgel colls (ESP2013Taninul1 to be deposited in AMNH).

Paratypes

MEXICO: 3, 5, 4 and 3.3 mm long; 4, 7, 5.5, 4.7 and 4 mm long; collecting data as for holotype. (ESP2013Taninul2–8 to be deposited in AMNH).

Description

Maximum body length 7.5 mm. Maximum conserved length of antenna and caudal appendages 4.5 mm. General color light yellow to white. Pedicellus about ⅔ as long as first article and with unicellular glands on ventral surface, clustered approximately in 4 groups and with a row of microchaetae bordering them in form of a U. On outside lateral border a cluster of about four groups forming a row of unicellular glands ( Fig. 1A ).

Head with macrochaetae and microchaetae as shown in Fig. 1 B–C, with approximately 8 + 8macrochaetae on border of insertion of antenna. Mouthparts short, labial palp as in Fig. 1D . Length of apical article equal to width and distinctly larger than penultimate article. Penultimate article with bulge containing two macrochaetae. Labium and first article of labial palp with macrochaetae. Maxilla as shown in Fig. 1E . Ultimate article of maxillary palp approximately equal in length to penultimate article.Apex of galea with two conules of different widths ( Fig. 1F ). Lacinia as in Fig. 1F . Mandible chaetotaxy as in Fig. 1G , with approximately four macrochaetae heavily sclerotized plus several macrochaetae less sclerotized.

Nota with about 6 macrochaetae on lateral borders apart from several setae of varied sizes ( Fig. 1 H–I). Legs as shown in Fig. 2A . Hind tibia approximately 3 times longer than wide and slightly shorter than tarsus. Claws with a hairy appearance ( Fig. 2B ), similar to other Anelpistina ( Espinasa et al. 2007) . Abdominal sterna II-VII subdivided into coxites and sternites and sterna VIII and IX of male entire ( Fig. 2 E–H), as in other members of subfamily. No apparent modifications in urosternum III of male. Urosternum IV of adult male with 1 + 1 articulated submedian appendages, their length being about 2× their width ( Fig. 2C ). Appendages acute, pointy and narrow, except at their base where they are broad, with a bulge on edge towards stylets. Appendages surpass stylets of this segment by half length of stylets ( Fig. 2C ). Apex of appendages slightly curved, but not quite hooked. Urosternum VIII of adult male deeply emarginated, its projections rounded ( Fig. 2E ). Urosternum IX of adult male as in Fig. 2 D–E. Point of insertion of parameres in urosternum IX very deep. Coxal processes with a few slightly more sclerotized setae ( Fig. 2 D–E). Stylets IX slightly larger than others, with two macrochaetae and extra subapical pair. Other stylets with one macrochaeta plus subapical pair ( Fig. 2E, H ). Terminal spine with small teeth. Stylets IX otherwise without modifications in males. Penis and parameres of adult males as in Fig. 2 D–E. Parameres attaining about half length of stylets IX, bend distinctly outwards, tapering on

the inner side to create an acute and slightly hooked apex. Distal portion somewhat sclerotized and with small, specialized hairs ( Fig. 2D ).

Urotergite X shallowly emarginated, posterior angles with two macrochaetae, one distinctly longer, plus a few relatively strong setae ( Fig. 2F ). Length of inner macrochaetae slightly longer than distance between them. Cercus of adult male with longer than wide basal annulus, followed by three annuli of about equal length and width, and then a very long annulus with spines. Composition of spines includes 4 spines; a long, acute and slightly curved spine, a small one, a strong, subacute spine, and a small one. The two large spines inserted in tubercles ( Fig. 2G ).

Adult female genital area as in Fig. 2H . Subgenital plate rounded, half as long as wide. Ovipositor surpassing stylets IX by about 2.75 times the length of stylus and gonapophyses with about 25 pseudoarticles. Distal portion with modified setae ( Fig. 2I ).

Postembryonic development

The holotype male was 7.5 mm long and had glands in the pedicellus, an articulated appendage on urosternum IV, and spines on the cerci. All three other smaller males (5, 4 and 3.3 mm) lacked all these secondary sexual characters. In the largest female (7 mm), the ovipositor surpasses stylets IX by about 2.75 times their length and the gonapophyses have about 25 pseudoarticles. In the female which is 5.5 mm long, it surpasses them by once their length and has about 22 pseudoarticles. At a length of 4.7 mm they barely reach the tip of the stylets and no subdivisions are evident. At a length of 4 mm the ovipositor is just starting to form.

Distribution

Specimens of this species have been collected only from the type locality.

Figures

Fig. 1. Anelpistina taninuli sp. nov. Holotype, adult. A. Pedicellus (outside lateral view). B. Head. C. Border of insertion of antenna (arrows point at alveoli where macrochaetae have fallen). D. Labium. E. Maxilla. F. Apex of lacinia and galea. Galea with two conules of different widths. G. Mandible. H. Nota. I. Border of nota.

Fig. 2. Anelpistina taninuli sp. nov. Holotype, adult and paratype,. A. Hind leg. B. Claws with enlarged section showing hairy appearance. C. Urosternum IV. D. Male genital area. E. Urosternum VIII-IX. F. Urotergite X. G. Cercus. H. Ovipositor and subgenital plate. I. Apex of ovipositor.