Denisiella caatingae, Palacios-Vargas & Ferreira & Zeppelini, 2018

Palacios-Vargas, José G., Ferreira, Aila Soares & Zeppelini, Douglas, 2018, Redefinition of Denisiella Folsom & Mills, 1938 (Collembola: Sminthurididae) with description of three new species from Brazil, Zootaxa 4434 (1), pp. 111-129 : 123-127

Denisiella caatingae sp. nov.

FIGS 26–36 TABLE 1

Type material. HOLOTYPE, MALE ON SLIDE 11748 , 16 III 2015. BRAZIL: PARAíBA : CAJAZEIRAS, ENG. ÁVIDOS, cOL. FERREIRA A.S. HOLOTYPE DEPOSITED AT CRFS / UEPB, JOÃO PESSOA, PARAíBA , BRAZIL. PARATYPES: 1 MALE ON SLIDE, SAME DATA AS HOLOTYPE IS KEPT AT LESM, ScIENcES FAcULTY , UNAM, MéXIcO.

Description. MALE. BODY LENGTH 873 µM. ANTENNAE BENT AS IN ALL SMINTHURIDIDAE MALES, ELBOWED BETWEEN ANT. II AND III ( FIGS. 26 AND 27 ). ANT. I WITH 7 SETAE, TWO VERY SMALL AND THIN ( FIG. 29 ), ANT. II WITH 19 REGULAR SETAE, TWO TRIcHOBOTHRIA (TRI1, TRI2), ONE MIcROSENSILLUM AND MODIfIED SETAE B1–6 ON THE SAME TUBERcLE AND LAMELLA B7 ISOLATE, SHORT AND THIcK ( FIG. 26 ), ANT. III WITH 14 REGULAR SETAE, ONE MIcROSENSILLUM AND ONE TRIcHOBOTHRIUM (TRI3), ANT. ORGAN III WITH A PAIR Of OVAL SENSILLA; MODIfIED SETAE C1–3, C1 LAMELLATE, THIcK AND SHORT, C2 AS A SMALL SPINE AND C3 IN THE SHAPE Of A BIG SPINE ( FIG. 27 ). ANT. IV SIMPLE, ELLIPTIcAL WHIT ABOUT 45 SETAE, PLUS fIVE SENSILLA DIffIcULT TO DISTINGUISH ( FIG. 28 ). RATIO ANT. I: II; III; IV AS 1: 0.9; 0.5; 0.9. 6+6 EYES. HEAD WITH NASAL ORGAN, ONE BIG ALVEOLUS WITH fOUR SETAE WITH fINE cILIATIONS ( FIG. 33 ).

LEG I ( FIG. 30 ): cOXA WITH ONE SETA; TROcHANTER WITH 3 SETAE; fEMUR WITH 11 SETAE; TIBIOTARSUS WITH 33 SETAE: TWO OVAL ORGAN 03pe AND 03ae PRESENT IN WHORL III AND fOUR SENSILLA IN A SMALL DOME fORM IN POSITION IVe, IVae, Ve AND Vae. LEG II ( FIG. 31 ): cOXA WITH ONE SETA; TROcHANTER WITH 3 SETAE; fEMUR WITH 10 SETAE; TIBIOTARSUS WITH 36 SETAE: TWO OVAL ORGAN 03pe AND 03ae PRESENT IN WHORL III AND A THIcK POLYcARINATE Vai PRESENT. LEG III ( FIG. 32 ): cOXA WITH 3 SETAE, AND ONE SMALL SPINE; TROcHANTER WITH 3 SETAE, ONE SHORT AND THIN IN VENTRAL POSITION; fEMUR WITH 8 SETAE AND TWO SERRATE SETAE; TIBIOTARSUS WITH ABOUT 34 SETAE: TWO OVAL ORGAN 03pe AND 03ae PRESENT IN WHORL III AND fOUR SERRATE SPINE-LIKE IN POSITION: IIIpi, IVpi, I Vp E Vpi. UNGUIS WITHOUT TUNIcA, WITH PSEUDONYcHIA; UNGUIS I, II AND III WITH ONE SMALL INNER TOOTH; UNGUIcULUS I AND II WITH fILAMENT SURPASSING THE UNGUIS. PRETARSUS WITH ONE ANTERIOR AND ONE POSTERIOR SETAE ON EAcH LEG.

THORAcIc SEGMENTATION NOT EVIDENT DORSALLY. GREAT ABDOMEN WITH TRIcHOBOTHRIA A/B/C TRIANGLE SHAPED. SMALL ABDOMEN WITH TRIcHOBOTHRIA D/E. VENTRAL TUBE WITH 1+1 SETA IN POSTERIOR POSITION. CORPUS Of TENAcULUM WITH TWO SETAE AND EAcH RAMUS WITH THREE TEETH AND BASAL APPENDAGE. GENITAL AND ANAL SEGMENTS fUSED INTO A SINGLE MASS. GENITAL PLATE Of THE MALE WITH ONE PAIR Of PREGENITAL SETAE AND 4 + 4 EUGENITAL SETAE. MANUBRIUM WITH 7+7 SETAE, DENS WITH 44 POSTERIOR, TWO Of THEM VERY LONG ( FIG. 34 ), ANTERIOR SURfAcE WITH SETAL fORMULA 3,3,3,3,2,2,2,1,1,1 ( FIG. 35 ). MUcRO WITH TWO LAMELLAE, INNER WITH ABOUT 28 SERRATIONS, OUTER SMOOTH, ONE MUcRONAL OUTER SETA ( FIG. 36 ). FEMALE UNKNOWN.

Etymology. THE SPEcIES WAS NAMED AfTER THE BRAZILIAN NAME fOR THE NORTHEASTERN SEMIARID VEGETATION. CAATINGA IS AN INDIGENOUS WORD THAT MEANS “WHITE fOREST”, DUE TO THE WHITISH cOLOR Of THE XEROMORPHIc VEGETATION, DOMINANT IN THE TYPE LOcALITY.

Distribution and habitat. THE SPEcIMENS WERE cOLLEcTED DURING THE BEGINNING Of THE RAINY SEASON IN A SEMIARID CAATINGA DOMAIN, LOcATED IN STATE Of PARAIBA, NORTHEASTERN BRAZIL (06°58' 27.7' 'S/34° 27' 32.2' ' W) GOOD’S BIOGEOGRAPHIc ZONE 27 ( GOOD1974).

Remarks. D. caatingae sp. nov., D. bretfeldi AND D. diomedesi SHARE THE PRESENcE Of A NASAL ORGAN IN THE MIDDLE LINE Of HEAD WITH fOUR cILIATE SETAE INSERTED IN A SINGLE BIG ALVEOLUS, BUT D. caatingae sp. nov. LAcKS THE TWO SPINEfORM SETAE IN SUcH ORGAN, WHIcH ARE PRESENT IN THE OTHER TWO SPEcIES. SETA B7 ON ANT. II AND C1 ON ANT. III Of THE NEW SPEcIES ARE IN THE SHAPE Of WIDE LAMELLA, MUcH DIffERENT fROM OTHERS. IN D. diomedesi THE POLYcARINATE SETA ON TIBIOTARSUS II IS LOcATED cLOSE TO A SPINE SETA, WHIcH IS ABSENT IN D. caatingae sp. nov. BUT BOTH SPEcIES HAVE A TIBIOTARSUS II WIDER THAN TIBIOTARSUS I AND III. D. bretfeldi HAS NO SERRATE SETAE IN THE TIBIOTARSUS III, WHILE THE D. caatinagae sp. nov. HAS fOUR SERRATE SETAE ( TABLE 1).

Figures

FIGURES 26–29. Denisiella caatingae sp. nov.: 26, Ant. II; 27, Ant. III; 28, Ant. IV; 29, Ant. I.

FIGURES 30–32. Denisiella caatingae sp. nov.: 30, leg I: trochanter, femur and chaetotaxy of tibiotarsus; 31, leg II: trochanter, femur and chaetotaxy of tibiotarsus; 32, leg III: trochanter, femur and chaetotaxy of tibiotarsus.

FIGURES 33–36. Denisiella caatingae sp. nov.: 33, frontal cephalic cheatotaxy; 33a, nasal organ in detail; 34, posterior cheatotaxy of dens; 35, anterior chaetotaxy of dens; 36, mucro.