Denisiella rhizophorae, 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 : 113-118

Denisiella rhizophorae sp. nov.

FIGS 1–12 , TABLE 1

Type material. HOLOTYPE, MALE ON SLIDE 11738, 1 IX 2009. BRAZIL: PARAíBA: BAYEUX, cOL. FERREIRA A.S . HOLOTYPE DEPOSITED AT CRFS-UEPB, JOÃO PESSOA, PARAíBA , BRAZIL. PARATYPES: 2 MALES AND 2 fEMALES ON SLIDES, SAME DATA AS HOLOTYPE, 2 MALES AND 2 fEMALES ARE KEPT AT LESM, ScIENcES FAcULTY , UNAM, MéXIcO . LABEL REf. #CRFS 11739, #CRFS 11740, #CRFS 11741 #CRFS 11742, #CRFS 11743.

Description. MALE. BODY LENGTH 777 µM (MEAN Of THREE MALES 660 µM). ANTENNAE BENT AS IN ALL SMINTHURIDIDAE MALES, ELBOWED BETWEEN ANT. II AND ANT. III ( FIGS. 1, 2 AND 12B ). ANT. I WITH 7 SETAE, TWO VERY SMALL AND THIN, AND TWO SUBAPIcAL THIcKER AND SHORTER THAN OTHER REGULAR SETAE ( FIG. 4 ). ANT. II WITH 20 SETAE, TWO TRIcHOBOTHRIA (TRI1, TRI2), ONE MIcROSENSILLUM AND MODIfIED SETAE B1–6 ON THE SAME TUBERcLE AND LAMELLA B7 WITH cONIc APEX ( FIG. 1 ). ANT. III WITH 13 REGULAR SETAE, ONE MIcROSENSILLUM AND ONE TRIcHOBOTHRIUM (TRI3), ANT. ORGAN III WITH A PAIR Of OVAL SENSILLA; MODIfIED SETAE C1-3, C1 LAMELLATE, C2 AS A SMALL BLUNT PROJEcTION AND C3 IS BIG SPINE WITH cONIc APEX ( FIG. 2 ). ANT. IV SIMPLE, ELLIPTIcAL WITH ABOUT 45 SETAE, PLUS ABOUT 6 SENSILLA DIffIcULT TO DISTINGUISH ( FIGS. 3 AND 12C ). RATIO ANT. I: II; III; IV AS 1: 1.1; 0.6; 1.0. 6+6 EYES ( FIGS. 8 AND 12A ). CHAETOTAXY Of HEAD AS IN FIG. 8 . CEPHALIc SETAE RELATIVELY LONG AND AcUMINATE, INTEROcULAR SETAE SHORT.

LEG I ( FIG. 5 ): cOXA WITH ONE SETA; TROcHANTER WITH 3 SETAE; fEMUR WITH 12 SETAE; TIBIOTARSUS WITH 33 SETAE: WHORL I WITH 9 SETAE, Ja cURVED AND SOMEWHAT THIcKENED; WHORL II WITH 8 SETAE, ONE SPINIfORM; WHORL III WITH 7 SETAE, IIIp ABSENT AND TWO OVAL ORGANS 03pe AND 03ae PRESENT; WHORL IV WITH 6 SETAE AND TWO LARGE HIGHLY ELEVATED SENSILLA Of RHAGIDIAL SHAPE, IVe AND IVae PRESENT; WHORL V WITH 4 SETAE Va AND Vp ABSENT TWO LARGE AND HIGHLY ELEVATED SENSILLA Of RHAGIDIAL SHAPE Ve AND Vae PRESENT ( FIG. 12D ). LEG II ( FIG. 6 ): cOXA WITH ONE SETA; TROcHANTER WITH 3 SETAE, ONE SHORT AND THIN IN VENTRAL POSITION; fEMUR WITH 11 SETAE; TIBIOTARSUS WITH 37 SETAE: WHORL I WITH 9 SETAE, Ja cURVED AND SOMEWHAT THIcKENED; WHORL II WITH 8 SETAE; WHORL III WITH 8 SETAE, IIIp ABSENT AND TWO OVAL ORGANS 03pe AND 03ae PRESENT; WHORL IV WITH 8 SETAE; WHORL V WITH 5 SETAE, Va AND Vp ABSENT, POLYcARINATE Vai PRESENT. LEG III ( FIG. 7 ): cOXA WITH 3 SETAE AND ONE SMALL SPINE; TROcHANTER WITH 3 SETAE, ONE SHORT AND THIN IN VENTRAL POSITION; fEMUR WITH 11 SETAE; TIBIOTARSUS WITH ABOUT 33 SETAE: WHORL I WITH 9 SETAE, Ja cURVED AND SOMEWHAT THIcKENED; WHORL II WITH 7 SETAE AND SERRATE SPINE-LIKE IIp PRESENT; WHORL III WITH 6 SETAE IIIp ABSENT SERRATE SPINE-LIKE IIIpi PRESENT AND TWO OVAL ORGAN 03pe AND 03ae PRESENT; WHORL IV WITH 7 SETAE IVp ONE SMALL SETA AND SERRATE SPINE-LIKE SETAE IVpi PRESENT; WHORL V WITH 5 SETAE Va AND Vp ABSENT AND SERRATE SPINE-LIKE Vpi PRESENT. UNGUIS WITHOUT TUNIcA, WITH PSEUDONYcHIA ( FIG. 12F ); UNGUIS I AND II WITH ONE SMALL INNER TOOTH, UNGUIS III WITHOUT INNER TOOTH ( FIG. 12E ), UNGUIcULUS I AND II WITH fILAMENT SURPASSING THE UNGUIS. PRETARSUS WITH ONE ANTERIOR AND ONE POSTERIOR SETAE ON EAcH LEG.

THORAcIc SEGMENTATION NOT DORSALLY EVIDENT. 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 APPENDIX. GENITAL AND ANAL SEGMENTS fUSED INTO A SINGLE MASS. GENITAL PLATE Of THE MALE WITH ONE PAIR Of PREGENITAL SETA AND 4 + 4 EUGENITAL SETAE. MANUBRIUM WITH 7+7 SETAE, DENS WITH 38 POSTERIOR SETAE ( FIG. 9 ), ANTERIOR SURfAcE WITH SETAL fORMULA 3,3,3,3,2,1,1,1 ( FIG. 10 ). MUcRO WITH TWO LAMELLAE, INNER WITH ABOUT 17 SERRATIONS, OUTER SMOOTH, ONE MUcRONAL OUTER SETA ( FIGS. 11 AND 12H ).

Female. BODY LENGTH 964 µM (ONLY ONE ADULT fEMALE). ANTENNAE ELBOWED BETWEEN ANT. II AND III. ANT. I WITH 5 SETAE, ANT. II WITH 11 AND ONE MIcROSENSILLUM, ANT. III WITH 12 AND ANT. ORGAN III A PAIR Of OVAL SENSILLA. ANT. IV ELLIPTIcAL, WITH ABOUT 40 SETAE. 6 + 6 EYES. CHAETOTAXY Of THE HEAD SIMILAR TO THE MALE.

LEG I: cOXA WITH ONE SETA, TROcHANTER WITH 3 SETAE; fEMUR WITH 12 SETAE; TIBIOTARSUS WITH 33 SETAE: ONE SPINE-LIKE IN WHORL IIpi AND TWO OVAL ORGANS 03pe AND 03ae PRESENT IN WHORL III. LEG II: cOXA WITH ONE SETA; TROcHANTER WITH 3 SETAE, ONE SHORT AND THIN IN VENTRAL POSITION; fEMUR WITH 11 SETAE; TIBIOTARSUS WITH 26 SETAE: TWO OVAL ORGANS 03pe AND 03ae PRESENT IN WHORL III. LEG III: cOXA WITH 3 SETAE, ONE SMALL SPINE; TROcHANTER WITH 3 SETAE, ONE SHORT AND THIN IN VENTRAL POSITION; fEMUR WITH 10 SETAE; TIBIOTARSUS WITH 32 SETAE: TWO OVAL ORGANS 03pe AND 03ae PRESENT IN WHORL

III AND fIVE SERRATE SPINE-LIKE IN POSITION IIpi, IIp, IIIpi, IVpi, Vpi. CHAETOTAXY Of WHORL Of TIOBIOTARSUS IS SIMILAR TO THE MALE. UNGUIS WITHOUT TUNIcA, WITH PSEUDONYcHIA; UNGUIS I AND II WITH INNER TOOTH, UNGUIS III WITHOUT INNER TOOTH, UNGUIcULUS WITH fILAMENT SURPASSING THE UNGUIS. PRETARSUS WITH ONE ANTERIOR AND ONE POSTERIOR SETAE ON EAcH LEG.

THORAcIc SEGMENTATION NOT EVIDENT. DORSAL cHAETOTAXY Of SMALL ABDOMEN WITH TWO PAIRS Of SMALL SERRATE SETAE IN THE SUPERIOR INNER EDGES Of THE LOWER VALVES. VENTRAL TUBE 1+1 SETA IN POSTERIOR POSITION. CORPUS Of TENAcULUM WITH TWO SETAE AND EAcH RAMUS WITH 3 TEETH AND ONE APPENDIX. MANUBRIUM WITH 7+7 SETAE, DENS WITH ABOUT 40 POSTERIOR SETAE; ANTERIOR SURfAcE WITH SETAL fORMULA 3,3,3,3,2,1,1,1. MUcRO WITH TWO LAMELLAE, INNER WITH ABOUT 17- 18 SERRATIONS, OUTER SMOOTH, ONE MUcRONAL OUTER SETA.

Etymology. THE NAME IS A REfERENcE TO THE MANGROVE Of THE GENUS Rhizophora ( RHIZOPHORAcEAE ) WHERE THE SPEcIMENS Of THE NEW SPEcIES WERE cOLLEcTED.

Distribution and habitat. THE SPEcIMENS WERE cOLLEcTED IN MANGROVE RIO PARAíBA DO NORTE, PARAíBA, BRAZIL (06°57'07°02S/34°50'3455W). GOOD’S BIOGEOGRAPHIc ZONE 27 ( GOOD 1974; CULIK & ZEPPELINI 2003).

Remarks. D. rhizophorae sp. nov. DIffERS fROM D. maesorum , D. diomedesi , AND D. colombiana IN THE SENSILLA SHAPE ON TIBIOTARSUS I, WHIcH IS RHAGIDIAL TYPE SIMILAR TO THAT Of D. ramosa . NEVERTHELESS D. ramosa PRESENTS 8+8 EYES AND THE NEW SPEcIES HAS ONLY 6+6 EYES. ONLY Denisiella rhizophorae sp. nov. AND D. serroseta LAcK INNER TOOTH ON UNGUIS III. IN ADDITION, THEY cAN ALSO BE REcOGNIZED fROM EAcH OTHER BY THE PRESENcE Of fOUR cOARSELY SERRATED SPINES ON TITA. III IN D. rhizophorae sp. nov., WHIcH ARE ABSENT IN D. serroseta ( TABLE 1).

Figures

FIGURE 12 A–H. Denisiella rhizophorae sp. nov.: Scanning Electronic Microscope (photos). A, eyes: 6 + 6 ommatidia; B, Ant. II and Ant. III clasping organ; C, Ant. IV; D, four sensilla of tibiotarsus I; E, unguis III without inner tooth; F, unguis II with pseudonychia; G, serrate spine-like setae of tibiotarsus III; H, mucro.

FIGURES 1–4. Denisiella rhizophorae sp. nov.: 1, Ant. II; 2, Ant. III; 3, Ant. IV; 4, Ant. I.

FIGURES 5–7. Denisiella rhizophorae sp. nov.: 5, leg I: trochanter, femur and chaetotaxy of tibiotarsus; 6, leg II: trochanter, femur and chaetotaxy tibiotarsus; 7, leg III: trochanter, femur and chaetotaxy tibiotarsus.

FIGURES 8-11. Denisiella rhizophorae sp. nov.: 8, frontal cephalic cheatotaxy; 9, posterior chaetotaxy of dens; 10, anterior chaetotaxy of dens; 11, mucro.