Eulibitia Roewer, 1912,

Medrano, Miguel & Kury, Adriano B., 2017, Taxonomic revision of the Andean genus Eulibitia Roewer, 1912 (Arachnida, Opiliones, Cosmetidae), with the description of five new species, European Journal of Taxonomy 357, pp. 1-55: 5-7

publication ID

https://doi.org/10.5852/ejt.2017.357

publication LSID

lsid:zoobank.org:pub:7A3BDEB4-DCF4-4111-A164-573CB62DC09F

DOI

http://doi.org/10.5281/zenodo.3851970

persistent identifier

http://treatment.plazi.org/id/03AE87A6-0912-7E49-BAEE-FD96FC415FD8

treatment provided by

Carolina

scientific name

Eulibitia Roewer, 1912
status

 

Eulibitia Roewer, 1912 

Eulibitia Roewer, 1912: 16  (type species: Eulibitia maculata Roewer, 1912  , by original designation).

Libitia (Messa) Sørensen in Henriksen, 1932: 412  (junior homonym of Messa Leach, 1817  ( Hymenoptera  ) and unavailable name because no type species was designated). Syn. nov.

Messa Mello-Leitão, 1933: 107  , 112 (available because a type species was designated and a description provided, but still invalid due to homonymy; type species: Libitia (Messa) scalaris Sørensen, 1932  , by original designation). Syn. nov.

Paramessa Mello-Leitão, 1933: 109  (type species: Libitia (Messa) castanea Sørensen, 1932  , by original designation). Syn. nov.

Brachylibitia Mello-Leitão, 1941: 166  (junior subjective synonym of Cynorta C.L. Koch, 1839  according to Goodnight & Goodnight (1953: 38); synonymy disclaimed by Kury (2003); junior subjective synonym of Platymessa Mello-Leitão, 1941  according to Medrano & Kury (2016); type species: Brachylibitia ectroxantha Mello-Leitão, 1941  , by original designation). Syn. nov.

Platymessa Mello-Leitão, 1941: 167  (type species: Platymessa  h-inscripta Mello-Leitão, 1941, by original designation). Syn. nov.

Messatana Strand, 1942: 398  (replacement name for Messa Mello-Leitão, 1933  ). Syn. nov.

Eulibitia  – Roewer 1914: 127; 1923: 298; 1928: 547. — Mello- Leitão 1926: 331; 1932: 56; 1933: 106. — Kury 2003: 60. — Pinto-da-Rocha & Hara 2011: 10. — Medrano & Kury 2016: 52.

Messa  – Mello-Leitão 1935: 114. — Kury & Alonso-Zarazaga 2011: 50.

Platimessa  (incorrect original spelling) – Mello-Leitão 1941: 167.

Platymessa  – Roewer 1963: 52. — Kury 2003: 81. — Medrano & Kury 2016: 54 View Cited Treatment .

Brachylibitia  – Kury 2003: 38.

Messatana  – Kury 2003: 67. — Kury & Alonso-Zarazaga 2011: 50.

Paramessa  – Kury 2003: 80.

Diagnosis

Outline of the dorsal scutum beta-shaped, with coda convergent posteriorly in males and almost parallel in females; protoglyphs shallow, with well-marked lateral triangular or rounded projections ( Figs 1View Fig, 6AView Fig). Posterior margin of scutum armed with two small paramedian tubercles (except for E. maculata  ). Areas II and IV unarmed ( Figs 5–6View FigView Fig). Yellowish white color markings of scutum as a ladder mask over dark brown background, blots dissociated sometimes to the point of having no white marking ( Fig. 20AView Fig, C–H). Spot as a yellowish band on posterior margin, posterior to paramedian tubercles, sometimes dissociated medially ( Figs 12AView Fig, 16AView Fig). Coxa IV entirely visible in dorsal view, reaching posterior groove of scutal area III ( Figs 5AView Fig, 8AView Fig). Chelicerae ( Figs 7FView Fig, 13AView Fig) monomorphic, weak, with marginal rows of acuminate tubercles of varied size on posterior border. Movable and fixed fingers with blunt teeth ( Fig. 17AView Fig). Pedipalpal femur with a dorsal keel formed by a row of tubercles ( Figs 10EView Fig, 17EView Fig). Legs short and strong, Fe III and IV slightly arched to the inside ( Fig. 21View Fig A–C); basitarsomeres of leg I of male thicker than distitarsomeres ( Fig. 2View Fig). Tarsal counts: 4–6; 6–14; 6–7; 6–9. Ventral plate of penis subrectangular laterally, with 6 pairs of MS, organized from base to top as follows: A1–A2, D1–D2, C1– C2; and ventrally: B basally and E1–E2 distally ( Figs 3View Fig, 22View Fig; contrasting with Ambatoiella  and Libitia  , see Fig. 4A, EView Fig). Microsetae of type T4, restricted to lateral margins of ventral side of VP as two parallel stripes from corners to MS B ( Fig. 30AView Fig, C–D).

Etymology Eulibitia  : from Greek εὖ (rightful, proper, good) + pre-existing generic name Libitia  (with origin

obscure, but sounds like an Ancient Roman woman’s name). Gender feminine. Messa  : from a city name in Ancient Greece. Gender feminine. Paramessa  : from Greek παρά (beside) + pre-existing genus Messa  . Gender feminine. Brachylibitia  : from Greek βραχύς (short) + pre-existing generic name Libitia  . Gender feminine. Platymessa  : from Greek πλατύ- (flattened) + pre-existing generic name Messa  . Gender feminine. Messatana  : variation of pre-existing genus Messa  . Gender feminine.

Included species

Eulibitia maculata Roewer, 1912  (type species), E. scalaris (Sørensen, 1932)  comb. nov., E. h-inscriptum ( Mello-Leitão, 1941) comb. nov., E. ectroxantha ( Mello-Leitão, 1941)  comb. nov., E. castor  sp. nov., E. clytemnestra  sp. nov., E. helena  sp. nov., E. leda  sp. nov. and E. pollux  sp. nov.

Key to the species of Eulibitia  (males only)

1. Scutal area I without tubercles, coxa IV without clavi inguines ( Figs 8AView Fig, 9AView Fig).................................2

– Scutal area I with two paramedian tubercles, coxa IV with clavi inguines ( Figs 12AView Fig, 16AView Fig)..............5

2. Scutal area III with two paramedian tubercles ....... E. ectroxantha ( Mello-Leitão, 1941)  comb. nov.

– Scutal area III without two paramedian tubercles ( Figs 9AView Fig, 20AView Fig)....................................................3

3. Scutum entirely unarmed ( Figs 19View Fig, 20AView Fig) ................................................. E. maculata Roewer, 1912 

– Posterior margin of scutum with two paramedian tubercles ( Fig. 20AView Fig).........................................4

4. Posterior margin of scutum with two paramedian tubercles, separated and rounded ( Fig. 8View Fig A–B); lateral margins of DS smooth ( Fig. 9AView Fig); penial MS D2 large and straight ( Fig. 9View Fig B–C) ................... ....................................................................................................................... E. clytemnestra  sp. nov.

– Posterior margin of scutum with paramedian tubercles, contiguous and acuminate ( Fig. 23AView Fig); lateral margins of DS with an irregular row of tubercles ( Fig. 24AView Fig); penial MS D2 minute ( Fig. 26BView Fig) .......................................................................................................................... E. pollux  sp. nov.

5. Ladder mask reaching lateral margins of DS (see Medrano & Kury 2016: figs 10–18) ................... ............................................................................. E. h-inscriptum ( Mello-Leitão, 1941) comb. nov.

– Ladder mask confined to mesotergum ( Fig. 28View Fig C–H).....................................................................6

6. Posterior margin of scutum with two acuminate paramedian tubercles slanted backward ( Fig. 5EView Fig) .................................................................................................................................. E. castor  sp. nov.

– Posterior margin of scutum with two rounded, erect paramedian tubercles ( Figs 11EView Fig, 15EView Fig)......7

7. Ladder mask overflowing the scutal grooves to reach areas I, II and III ( Figs 11View Fig, 12AView Fig); femur IV straight, with a large dorso-apical spine ( Fig. 12View Fig C–D) .......................................... E. helena  sp. nov.

– Ladder mask confined to the scutal grooves ( Figs 15AView Fig, 16AView Fig); femur IV curved, without a large dorso-apical tubercle or spine ( Fig. 17View Fig G–I)....................................................................................8

8. Coda short, with constriction poorly marked, dorsal apophysis of coxa IV acuminate and with few minute granules ( Figs 15AView Fig, 16AView Fig), patella of pedipalpus with a mesal keel without tubercles ( Fig. 17FView Fig) .................................................................................................................... E. leda  sp. nov.

– Coda large, with constriction well marked, dorsal apophysis of coxa IV rounded and widely granulated ( Figs 27AView Fig, 28AView Fig), patella of pedipalpus with a mesal keel with a row of small setiferous tubercles ( Fig. 29EView Fig) ................................................................ E. scalaris (Sørensen, 1932)  comb. nov.

Although no material of the species E. ectroxantha  has been examined in this project, the description and illustrations provided by Mello-Leitão (1941) are sufficient and appropriated for this key, taking into account the characteristics listed for the other species in this section.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Cosmetidae

Loc

Eulibitia Roewer, 1912

Medrano, Miguel & Kury, Adriano B. 2017
2017
Loc

Brachylibitia

Kury A. B. 2003: 38
2003
Loc

Messatana

Kury A. B. & Alonso-Zarazaga M. - A. 2011: 50
Kury A. B. 2003: 67
2003
Loc

Paramessa

Kury A. B. 2003: 80
2003
Loc

Platymessa

Medrano M. & Kury A. B. 2016: 54
Kury A. B. 2003: 81
Roewer C. F. 1963: 52
1963
Loc

Messatana

Strand E. 1942: 398
1942
Loc

Brachylibitia Mello-Leitão, 1941: 166

Goodnight C. J. & Goodnight M. L. 1953: 38
Mello-Leitao C. F. de 1941: 166
1941
Loc

Platymessa Mello-Leitão, 1941: 167

Mello-Leitao C. F. de 1941: 167
1941
Loc

Platimessa

Mello-Leitao C. F. de 1941: 167
1941
Loc

Messa

Kury A. B. & Alonso-Zarazaga M. - A. 2011: 50
Mello-Leitao C. F. de 1935: 114
1935
Loc

Messa Mello-Leitão, 1933: 107

Mello-Leitao C. F. de 1933: 107
1933
Loc

Paramessa Mello-Leitão, 1933: 109

Mello-Leitao C. F. de 1933: 109
1933
Loc

Libitia (Messa) Sørensen in Henriksen, 1932: 412

Henriksen K. L. 1932: 412
1932
Loc

Eulibitia

Medrano M. & Kury A. B. 2016: 52
Pinto-da-Rocha R. & Hara M. 2011: 10
Kury A. B. 2003: 60
Roewer C. F. 1928: 547
Roewer C. F. 1923: 298
Roewer C. F. 1914: 127
Mello- Leitão 1926: 331
1932: 56
1933: 106 .
1914
Loc

Eulibitia

Roewer C. F. 1912: 16
1912