Sparianthis beebei, Rheims, 2020

Rheims, Cristina A., 2020, Revision of the spider genus Sparianthis Simon, 1880 (Araneae, Sparassidae Sparianthinae), Zootaxa 4890 (2), pp. 151-191 : 158-159

publication ID

https://doi.org/10.11646/zootaxa.4890.2.1

publication LSID

lsid:zoobank.org:pub:5EF7FF4A-0857-415F-B30F-DA2910F5B6EB

DOI

https://doi.org/10.5281/zenodo.4333396

persistent identifier

https://treatment.plazi.org/id/4E338797-8727-FFF9-D8E9-7F67FB04FDA0

treatment provided by

Plazi

scientific name

Sparianthis beebei
status

sp. nov.

Sparianthis beebei sp. nov.

Figs 11–16 View FIGURES 11–16 , 143 View FIGURES 143–144

Type material. Holotype: ³ from Trinidad & Tobago, Trinidad, Arima, Simla [William Beebe Tropical Research Station, 10.6914, -61.2874], 20 April 1964, A.M. Chickering leg. ( MCZ 69673 View Materials ) GoogleMaps . Paratype: 1♀, from Trinidad & Tobago, Trinidad, no specific locality, April 1964, A.M. Chickering leg. ( MCZ 69674 View Materials ) .

Etymology. The specific name honours Charles William Beebe, an American naturalist, who established the Simla Tropical Research Station, where the holotype was collected; genitive case.

Diagnosis. Males of S. beebei sp. nov. resemble those of S. crulsi by the palp with mRTA sickle-shaped, arising from base of dRTA ( Figs 13 View FIGURES 11–16 , 65 View FIGURES 63–68 ). They are distinguished from the latter species by TBE with distal projection resembling a fishtail (short and laminar in S. crulsi ) ( Fig. 12 View FIGURES 11–16 ). Females resemble those of S. juazeiro sp. nov. by the epigyne with lateral furrows reaching anterior furrow ( Figs 14 View FIGURES 11–16 , 90 View FIGURES 90–92 ). They are distinguished from the latter species by median septum beer glass-shaped, constricted at posterior fourth, and internal ducts with first turn anteriad (median septum hour glass-shaped, constricted at middle, and first turn mediad in S. juazeiro sp. nov.) ( Figs 14–16 View FIGURES 11–16 ).

Description. Male (holotype): Prosoma brown; fovea darker brown; eye borders black. Chelicerae brown, slightly darker than prosoma. Legs and palps brown, slightly lighter than prosoma. Labium brown, distally lighter. Endites pale brown. Sternum yellowish brown with pale brown margins. Opisthosoma grayish cream colored; dorsally with brownish gray pattern of elongate, irregular marks laterally, lighter gray stripes along each side of cardiac mark. Total length 6.4. Prosoma: 2.9 long, 2.5 wide. Opisthosoma: 3.5 long, 2.0 wide. Eyes: diameters 0.20, 0.14, 0.12, 0.16; interdistances: 0.18, 0.04, 0.28, 0.16, 0.12, 0.04. Legs (2143): I: 11.5 (3.1, 1.5, 3.1, 3.0, 0.8); II: 11.7 (3.3, 1.5, 3.0, 3.1, 0.8); III: 9.2 (2.7, 1.3, 2.1, 2.4, 0.7); IV: 11.1 (3.2, 1.1, 2.6, 3.2, 1.0). Spination follows the generic pattern. Metatarsi III–IV with ventral distal preening combs. Palp: tibia with prolateral spines long; tegulum with retro-proximal protrusion; TBC wide, keel-like; embolus slender, with no projections, running distally and curving ventral-proximally at distal margin of alveolus ( Figs 11–13 View FIGURES 11–16 ).

Description. Female (paratype): Coloration lighter than male; prosoma with darker brown lines extending posteriorly from behind PLE and PME. Total length: 7.3. Prosoma: 2.9 long, 2.6 wide. Opisthosoma: 4.3 long, 2.6 wide. Eyes: diameters: 0.20, 0.16, 0.12, 0.14; interdistances: 0.18, 0.08, 0.30, 0.20, 0.14, 0.08. Legs (4213): I: 9.5 (2.7, 1.5, 2.5, 2.2, 0.6); II: 9.8 (2.9, 1.6, 2.5, 2.3, 0.6); III: 8.0 (2.4, 1.3, 1.8, 1.9, 0.6) IV: 9.9 (2.7, 1.6, 2.2, 2.6, 0.8). Spination follows the generic pattern except femora II–III: r0 and tibia III: p0-0-1. Metatarsi III–IV with ventral distal preening combs. Epigyne: epigynal field rectangular, longer than wide; anterior furrow slightly recurved; median septum at least two times longer than wide, with posterior margin rounded ( Fig. 14 View FIGURES 11–16 ). Vulva: internal ducts slender, half spermathecae width; glandular projection arising from duct at first turn; spermathecae rounded ( Figs 15–16 View FIGURES 11–16 ).

Distribution. Only known from the type locality, in Arima, Trinidad & Tobago ( Fig. 143 View FIGURES 143–144 ).

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Sparassidae

Genus

Sparianthis