Cletocamptus deborahdexterae, Gómez & Fleeger & Rocha-Olivares & Foltz, 2004

Gómez, Samuel, Fleeger, John W., Rocha-Olivares, Axayácatl & Foltz, David, 2004, Four new species of Cletocamptus Schmankewitsch, 1875, closely related to Cletocamptus deitersi (Richard, 1897) (Copepoda: Harpacticoida), Journal of Natural History 38 (21), pp. 2669-2732 : 2671-2685

publication ID	https://doi.org/10.1080/0022293031000156240
DOI	https://doi.org/10.5281/zenodo.15675520
persistent identifier	https://treatment.plazi.org/id/AF0B87BC-FE23-FFC7-FE1F-FE34FCE9FC5A
treatment provided by	Felipe
scientific name	Cletocamptus deborahdexterae
status	sp. nov.

Treatment

Cletocamptus deborahdexterae sp. nov.

( figures 1–13 View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG )

Cletocamptus deitersi ( Richard, 1897) sensu Dexter (1995) , Simpson et al. (1998). Cletocamptus deitersi type IIIC sensu Rocha-Olivares et al. (2001).

Cletocamptus from Salton Sea, California sensu Castro-Longoria et al. (2003).

Type material

One female holotype ( USNM 1010499 ) and one male allotype ( USNM 1010500 ) preserved in alcohol, 10 dissected female ( EMUCOP- 0799-08 , EMUCOP- 0799-09 , EMUCOP- 0799-10 , EMUCOP- 0799-11 , EMUCOP- 0799-12 , EMUCOP- 0799-13 , EMUCOP- 0799-14 , EMUCOP- 0799-15, EMUCOP-0799-16, EMUCOP- 0799-17 ) and five dissected male ( EMUCOP- 0799-03 , EMUCOP- 0799-04 , EMUCOP- 0799-05 , EMUCO- 0799-06 , EMUCOP- 0799-07 ) paratypes, six female and three male paratypes ( USNM 1010501 ) and six female ( EMUCOP- 0799-01 ) and two male ( EMUCOP- 0799-02 ) paratypes preserved in alcohol. July 1997; coll. A. Rocha-Olivares, J. W. Fleeger and D. Foltz.

Type locality Salton Sea , California (33 ° 13 ’ N, 115 ° 52 ’ W).

Etymology

The species was named in honour of Dr Deborah Dexter (San Diego State University, Department of Biology), who provided us with Cletocamptus specimens from the Salton Sea (California).

Description

Female. Habitus ( figure 1 View FIG ) tapering posteriorly; total body length measured from tip of rostrum to posterior margin of caudal rami ranging from 540 to 715 M m (mean, 605 M m, N ~12; holotype, 620 M m). Rostrum set off, triangular, with pair of setules subapically. Cephalic shield ornamented with fine and long spinules along margin dorsolaterally ( figure 1A, B View FIG ). Dorsal and lateral surface of free thoracic somites (P2–P4 bearing somites) ornamented with transverse rows of minute spinules, with longitudinal row of small spinules close to posterior margin and with long spinules along posterior margin ( figures 1A, B View FIG , 2 View FIG ). Dorsal and lateral surface of first urosomite (P5 bearing somite) with transverse rows of minute spinules, with row of small spinules close to posterior margin and with relatively longer spinules along posterior margin ( figures 1A, B View FIG , 3 View FIG ). First and second genital somites distinct dorsally and laterally ( figure 1A, B View FIG ), completely fused ventrally ( figure 4A View FIG ); dorsal and lateral surface of first and second genital somite with transverse rows of minute spinules, with row of long spinules along posterior margin of both somites, and with relatively longer spinules laterally, ventrally ornamented with spinules as shown in figure 4A View FIG . Fourth and fifth urosomite as in second genital somite dorsally ( figures 1A, B View FIG , 3 View FIG ), ventral surface ornamented with transverse rows of spinules as illustrated in figure 4A View FIG . Dorsal surface of anal somite ( figure 1A, C View FIG ) ornamented with transverse rows of minute spinules and with dorsolateral strong spinules close to joint with caudal rami; rounded anal operculum furnished with spinules close to posterior margin ( figures 1A, C View FIG , 3 View FIG , 5H View FIG ); with median row of strong spinules laterally. Caudal rami ( figures 1A, B, C, D View FIG , 5H, I View FIG ) about 1.5 times longer than wide; dorsal and ventral surface smooth, except for inner set of spinules close to insertion site of seta VII and close to posterior margin dorsally and ventrally; with seven elements in all.

Antennule ( figure 5A View FIG ) six-segmented; surface of segments smooth except for two rows of spinules on first segment. Armature formula, 1-(1), 2-(8), 3-(5), 4-(1z[1zae]), 5-(1), 6-(9z[1zae]).

Antenna ( figure 5B View FIG ) with small coxa. Allobasis armed with two abexopodal setae. Free endopodal segment ornamented with inner strong spinules proximally and subdistally; with two lateral inner spines and a slender seta (the latter arrowed in figure 5B View FIG ), and five distal elements. Exopod ( figure 5B, C View FIG ) one-segmented; about seven times longer than wide; ornamented with few spinules, and armed with one lateral and two apical smooth setae.

Mandible ( figures 5D View FIG , 6 View FIG ) robust, ornamented with rows of spinules proximally; chewing edge with four strong teeth, four elements as in figure 5D View FIG , one pyriform element and one lateral pinnate strong seta. Palp (see figure 6 View FIG ) one-segmented, with two long setae unequal in length, with one small seta arising nearby.

Maxillule ( figure 5E View FIG ) robust; arthrite of praecoxa ornamented with few spinules, armed with one surface seta, seven distal spines and one lateral strong seta, the latter ornamented with long spinules (see insert in figure 5E View FIG ). Coxa ornamented with some spinules and armed with two slender setae. Basis ornamented with some median spinules, and armed with three apical setae; exopod and endopod represented by three setae each.

Maxilla ( figure 5F View FIG ): syncoxa ornamented with minute spinules along inner and outer margin, and close to joint with allobasis; with two endites, each bearing three setae (see insert in figure 5F View FIG ). Allobasis drawn into strong claw bearing one accompanying seta. Endopod represented by three setae.

Maxilliped ( figure 5G View FIG ) subchelate. Syncoxa ornamented with two rows of spinules and armed with a small seta on inner distal corner. Basis without armature and ornamented with one anterior and one posterior row of spinules, and with few spinules close to joint with endopod. The latter drawn into long and slender claw with one accompanying small seta.

P1 ( figure 7A View FIG ): praecoxa ornamented with spinules close to joint with coxa. The latter ornamented with anterior transverse rows of spinules, and with posterior long and slender spinules in outer distal corner. Basis ornamented with median row of spinules, and with stronger spinules at base of exopod, between rami and at base of inner spine of basis. Exopod three-segmented. Endopod two-segmented, nearly as long as exopod. Armature formula as in table 1. View Table 1

P 2 View Table 2 ( figure 7B View FIG ): coxa ornamented with median row of small spinules and with strong spinules close to outer distal corner anteriorly, and with some spinules close to outer distal corner posteriorly. Basis ornamented with spinules between rami and at base of endopod, and with stronger spinules at base of exopod; outer element spine-like. Exopod three-segmented and ornamented as in figure 7B View FIG . Endopod twosegmented, reaching about the middle of second exopodal segment; first segment small, slightly wider than long and ornamented with outer and inner spinules; second segment ornamented with long spinules as shown in figure 7B View FIG , and armed with one inner spine, one apical and one inner seta. Armature formula as in table 1. View Table 1

P3 ( figure 8A View FIG ): praecoxa ornamented with transverse row of spinules close to joint with coxa. The latter as in P2. Basis as in P2 except for seta-like outer element. Exopod as in P2. Endopod as in P2 except for comparatively shorter second segment. Armature formula as in table 1. View Table 1

P4 ( figure 8B View FIG ): praecoxa, coxa and basis as in P3. Exopod as in P3, except for armature formula of third segment (without inner seta). Endopod two-segmented, barely reaching tip of first exopodal segment; first segment small, slightly wider than long; second segment ornamented with inner and outer slender spinules and armed with two apical setae.

P5 ( figure 4B View FIG ): exopod and baseoendopod fused. Baseoendopodal lobe longer than exopod, ornamented with sets of inner spinules, with spinules at base of apical seta and with some outer spinules; armed with one outer, one apical and four inner setae; relative length of setae as in figure 4B View FIG . Exopod ornamented with spinules as shown in figure 4B View FIG , and armed with five setae in all, plus outer seta of basis.

P6 ( figure 4A View FIG ) represented by median plate in anterior half of first genital somite, each vestigial leg represented by a long and slender seta. Copulatory pore in the middle of genital double segment.

Male. Total body length measured from tip of rostrum to posterior margin of caudal rami, ranging from 515 to 650 M m (mean, 562.8 M m, N ~9; allotype, 605 M m). Habitus ( figure 9A, B View FIG ), anal segment and caudal rami ( figure 9C, D View FIG ) as in female dorsally, except for genital somite and for two rows of spinules on anal operculum. Ventral ornamentation of third, fourth and fifth urosomites ( figure 12A View FIG ) coarser than in female.

Antennule ( figures 12B View FIG , 13 View FIG ) six-segmented; subchirocer. Last segment with two acute teeth ( figure 13 View FIG ).

Antenna, mandible, maxillule, maxilla and maxilliped (not illustrated) as in female.

P1 ( figure 10A View FIG ) as in female except for dimorphic projection on inner distal corner of basis.

P2 ( figure 10B View FIG ) as in female except for relatively stouter outer spines of male exopod, dimorphic inner spine on male ENP 2, and relatively shorter apical setae on second endopodal segment.

Exopod of P3 ( figure 11A View FIG ) as in female except for relatively stouter outer spines. Endopod three-segmented; second segment with inner distal apophysis reaching far beyond third endopodal segment; second segment barely reaching tip of first exopodal segment, with one inner and one apical seta relatively shorter than their female homologues.

P4 ( figure 11B View FIG ) as in female, except for stouter outer spines of exopod and relatively shorter setae of second endopodal segment.

Both P5 fused ( figure 12A View FIG ); exopod and baseoendopod fused. Exopod ornamented with spinules at base of outer seta of basis, at base of apical elements and along inner margin; with four setae. Endopodal lobe ornamented with spinules along outer and inner margin, and at base of apical setae; with three elements in all.

P6 ( figure 12A View FIG ) represented by plate; without armature.

Variability

Male. Paratype (EMUCOP-0799-05) possesses an aberrant right P4.

Female. Paratype (EMUCOP-0799-10) possesses two inner setae on left P3 ENP 2; paratype (EMUCOP-0799-14) possesses two inner setae on left P4 EXP 2, and five setae on right P5 BENP; paratype (EMUCOP-0799-15) possesses one inner seta on right P4 EXP 3, and five setae on right P5 BENP; paratype (EMUCOP-0799-16) possesses an aberrant outer spine on right P1 EXP 3, three setae on left P4 ENP 2, and five setae on both P5 BENP; paratype (EMUCOP- 0799-09) possesses five setae on right P5 BENP; paratype (EMUCOP-0799-18) possesses a reduced inner seta on left P5 BENP (see table 2 View Table 2 ).