Nearctomeris smoky, Recuero & Caterino, 2023
|
publication ID |
https://dx.doi.org/10.3897/zookeys.1166.103516 |
|
publication LSID |
lsid:zoobank.org:pub:B591559C-AC63-4063-B322-67E194E7A7EC |
|
persistent identifier |
https://treatment.plazi.org/id/ECD780D7-C94D-46C4-9C35-D517EA974758 |
|
taxon LSID |
lsid:zoobank.org:act:ECD780D7-C94D-46C4-9C35-D517EA974758 |
|
treatment provided by |
|
|
scientific name |
Nearctomeris smoky |
| status |
sp. nov. |
Nearctomeris smoky sp. nov.
Figs 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5
Type material.
Holotype: male (USNM ENT01838998; Fig. 3 View Figure 3 ), USA, Tennessee, Blount Co., Great Smoky Mountains N. P., Whiteoak Sink; 35.6369°N, 83.7418°W; in leaf litter at base of rock; leg. M. Caterino, A. Haberski & P. Wooden, 27.x.2021. Paratypes: 2 males (CUAC000180803, GRSM217979), 2 females (USNM ENT01838999, GRSM217980) and 5 juveniles (CUAC000180807-CUAC000180810, GRSM217981), same data as holotype.
Diagnosis.
Externally similar to Nearctomeris inexpectata ; they can be differentiated in the shape of the femoral process (distal finger) of telopods (Fig. 5E View Figure 5 ), blunt and rounded in N. inexpectata , elongated and curved in the N. smoky sp. nov., and of the syncoxite (Fig. 5D View Figure 5 ), distally broader in N. inexpectata than in N. smoky sp. nov., with rounded central lobe in N. inexpectata and bilobed in N. smoky sp. nov., and lateral processes shorter in N. inexpectata than in N. smoky sp. nov. The observed mean COI pairwise uncorrected p-distance between both species is 6.85%.
Name.
Smoky, a noun in apposition, refers to the Great Smoky Mountains where the species lives.
Description.
Body with 12 segments (including collum). Length of largest male (holotype), 2.9 mm; width at thoracic shield 1.8 mm, at tergite five 2 mm; height of thoracic shield 1.3 mm. Length of largest female 3.2 mm; width at thoracic shield 2 mm, at tergite five 2.1 mm; height of thoracic shield 1.3 mm.
General coloration of adults (Fig. 3 View Figure 3 ) brown to dark brown dorsally; collum with a large, central, off-white area; tergites 2-11 with lateral, transversely oval, off-white areas; lateral and posterior margins of tergites translucent; head brown, more or less mottled with white, labrum and organ of Tömösváry white, ocular field black; antennae brown mottled with white; ventrally off-white, legs white, mottled or not with brown, with brown tarsi. Juveniles with 11 segments with similar pattern but much lighter than adults, and even lighter in juveniles with 10 segments (Fig. 4A View Figure 4 ).
Head (Fig. 3B View Figure 3 ): structure typical of Nearctomeris , without any distinct crest or groove. Ommatidia 5+1 or 4+1, unpigmented, within a black, elongate ocular field. Tömösváry’s organ transverse, horseshoe-shaped, about 2 times as wide as long. Antennae with antennomere 3 shorter than 1 and 2 combined; four apical cones.
Collum (Fig. 4B View Figure 4 ): surface smooth, finely and densely punctured dorsally with minute pits, as the rest of segments, with two well-marked, transverse striae.
Thoracic shield (Fig. 4B View Figure 4 ): with schisms rounded posteriorly, well-differentiated but not protruding beyond tergite contour. Schism impression broad and well-developed. Only three striae transversely crossing the shield; no trace of a central, incomplete stria. One strong, one very weak lateral stria below the schism impression.
Tergites (Figs 3A View Figure 3 , 4A View Figure 4 ): with soft, shiny appearance; surface densely covered with small pits that, observed through the transparent first layer of the tegument, seem to be the opening of pore canals connecting the epidermis with the exterior. There is no trace of setae on the tergites. Tergite 11 is partially hidden under tergite 10.
Mid-body legs (Fig. 5A View Figure 5 ): relatively slender, femur about 2.5 times as long as wide, tarsus 5-5.5 times as long as wide. Ventral margin of prefemur and femur with numerous strong setae. Tarsus with 5-6 ventral, 2-3 dorsal spiniform setae, mostly set in the distal half. Claw 4-4.5 times as long as wide.
Anal shield (Fig. 3B View Figure 3 ): with evenly rounded posterior border, with no sign of a notch or concavity.
Male leg pair 17 (Fig. 5B View Figure 5 ): with a broad coxal lobe, mesally with a spiniform seta; telopodite formed by three strongly reduced podomeres, first and second with mesal spiniform setae, third with an apical spiniform seta.
Male leg pair 18 (Fig. 5C View Figure 5 ): with no obvious syncoxial notch; coxa with a spiniform seta; 4-segmented telopodite, reduced but better developed than in leg pair 17. First, second and third podomeres with mesal spiniform setae, apical in fourth podomere.
Telopod (Fig. 5D-F View Figure 5 ): robustly developed; syncoxite (Fig. 5D View Figure 5 ) with a long, subrectangular central lobe (cL) with bilobed distal margin, flanking lateral processes (h) longer than the lobe and carrying long, strong, mesoproximal setae and a spiniform mesodistal seta. Prefemur trichostele (Fig. 5E, F View Figure 5 ; Pre-tri) about as long as prefemur width. Femur trichostele (Fig. 5E View Figure 5 ; Fem-tri) about two thirds as long as the prefemoral one. Femoral process (distal finger) (Fig. 5E, F View Figure 5 ; Fem-pr) broad at base, distal half much narrower and distal third curved anteriad. Fields of sclerotized scale-like structures present on femoral distal finger and tibia (Fig. 5F View Figure 5 ). Tarsus strong, blunt and curved, with a strong, apical spine.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.