Cletocamptus stimpsoni, 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 : 2685-2698

publication ID	https://doi.org/10.1080/0022293031000156240
DOI	https://doi.org/10.5281/zenodo.15675623
persistent identifier	https://treatment.plazi.org/id/AF0B87BC-FE35-FFCA-FE03-FBB5FEACFD28
treatment provided by	Felipe
scientific name	Cletocamptus stimpsoni
status	sp. nov.

Treatment

Cletocamptus stimpsoni sp. nov.

( figures 14–23 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 Fleeger (1980) , De Laune et al. (1984), Decho (1986, 1988), Chandler (1986), Chandler and Fleeger (1987), Sun and Fleeger (1994), Pace and Carman (1996), Carman et al. (1997, 2000).

Cletocamptus deitersi type I sensu Rocha-Olivares et al. (2001).

Cletocamptus from Jackson, Alabama sensu Castro-Longoria et al. (2003).

Type material

One female holotype ( USNM 1010502 ) and one male allotype ( USNM 1010503 ) preserved in alcohol, 12 dissected male (EMUCOP- 0698-15 , EMUCOP- 0698-16 , EMUCOP- 0698-17 , EMUCOP- 0698-18 , EMUCOP- 0698-19 , EMUCOP- 0698- 20, EMUCOP- 0698-21 , EMUCOP- 0698-22, EMUCOP- 0698-23 , EMUCOP- 0698- 24 , EMUCOP- 0698-25 , EMUCOP- 0698-26 ) and 12 dissected female paratypes ( EMUCOP- 0698-03, EMUCOP- 0698-04 , EMUCOP- 0698-05 , EMUCOP- 0698-06 , EMUCOP- 0698-07 , EMUCOP- 0698-08 , EMUCOP- 0698-09 , EMUCOP- 0698-10 , EMUCOP- 0698-11 , EMUCOP- 0698-12 , EMUCOP- 0698-13 , EMUCOP- 0698-14 ), 20 female and nine male paratypes preserved in alcohol ( USNM 1010504 ), and 13 female ( EMUCOP- 0698-01 ) and eight male ( EMUCOP- 0698-02 ) paratypes preserved in alcohol. June 1998, coll. A. Rocha-Olivares, J. W. Fleeger and D. Foltz.

Type locality

Brine seep , Fred Stimpson Wildlife Refuge , Jackson, Alabama, USA (31 ° 23 ’ N, 87 ° 53 ’ W).

Etymology

The species was named in honour of the Fred T. Stimpson Wildlife Refuge (Alabama, USA).

Description

Female. Habitus ( figure 14A, B View FIG ) tapering posteriorly; total body length measured from tip of rostrum to posterior margin of caudal rami ranging from 415 to 660 M m (mean, 529 M m, N ~26; holotype, 550 M m). Rostrum set off, triangular, with pair of setules subapically. Cephalic shield ornamented with small spinules along posterior margin dorsolaterally ( figure 14A, B View FIG ). Dorsal and lateral surface of free thoracic somites (P2–P4 bearing somites) ornamented with transverse rows of minute spinules, and with very small spinules along posterior margin. Dorsal and lateral surface of first urosomite (P5 bearing somite) ornamented as preceding somite. First and second genital somites distinct dorsally and laterally, completely fused ventrally ( figure 15A View FIG ); dorsal and lateral surface of first and second genital somite with transverse rows of minute spinules, with row of stronger spinules along posterior margin of both somites, and with relatively longer spinules laterally; ventrally ornamented with spinules as shown in figure 15A View FIG . Fourth and fifth urosomite as in second genital somite dorsally, except for more abundant transverse spinular rows; ventral surface ornamented with few median spinules as illustrated in figure 15A View FIG , and with longer spinules along posterior margin. Dorsal surface of anal somite ( figure 14A 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 small spinules close to posterior margin. Caudal rami ( figure 14C, D View FIG ) about 1.5 times longer than wide; with few spinular rows dorsally and ventrally ( figures 14C, D View FIG , 15A View FIG ); with seven elements in all.

Antennule ( figure 16A 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 16B View FIG ) with allobasis armed with two abexopodal setae. Free endopodal segment ornamented with inner strong spinules proximally and subdistally; with two lateral inner spines and one slender seta (the latter arrowed in figure 16B View FIG ), and five distal elements. Exopod one-segmented; about seven times longer than wide; ornamented with few spinules and armed with one lateral and one apical smooth seta.

Mandible ( figure 16C View FIG ) robust, ornamented with rows of spinules proximally; chewing edge with four strong teeth, four elements as in figure 16C View FIG , one pyriform element and one lateral pinnate strong seta. Palp small, one-segmented, with two long setae (see also figure 17 View FIG ).

Maxillule ( figure 16D View FIG ) robust; arthrite of praecoxa ornamented with few spinules, armed with a surface seta, seven distal spines and one lateral slender seta (see insert in figure 16D 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 16E View FIG ): syncoxa ornamented with minute spinules along inner and outer margin; with two endites, each bearing three setae. Allobasis drawn into strong claw bearing an accompanying seta. Endopod represented by three setae.

Maxilliped ( figure 16F View FIG ) subchelate. Syncoxa ornamented with spinules and armed with a small seta on inner distal corner. Basis without armature and ornamented with longitudinal spinules anteriorly and posteriorly. Endopod drawn into long and slender claw with one accompanying small seta.

P1 ( figure 18A 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, somewhat shorter than exopod. Armature formula as in table 1. View Table 1

P 2 View Table 2 ( figure 18B View FIG ): praecoxa as in P1. 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 median row of spinules close to inner distal corner, and at base of exopod; outer element of basis seta-like. Exopod three-segmented and ornamented as in figure 18B View FIG . Endopod two-segmented, reaching proximal quarter of second exopodal segment; first segment small, about as long as wide and ornamented with outer and inner spinules; second segment ornamented with long spinules as shown in figure 18B 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 19A View FIG ): praecoxa ornamented with transverse row of spinules close to joint with coxa. The latter and basis as in P2. Exopod as in P2, except for two inner setae on third segment. Endopod as in P2, armed with three inner, one apical and one outer seta. Armature formula as in table 1. View Table 1

P4 ( figure 19B View FIG ): praecoxa, coxa and basis as in P3. Exopod as in P3, except for armature formula of third segment. Endopod two-segmented, very small; first segment small, slightly wider than long; second segment ornamented with inner and outer slender spinules and armed with two apical setae.

P5 ( figure 15B View FIG ): exopod and baseoendopod fused. Baseoendopodal lobe longer than exopod, ornamented with sets of inner spinules, and with spinules on distal part of ramus; armed with one outer, one apical and four inner setae; relative length of setae as in figure 15B View FIG . Exopod ornamented with spinules as shown in figure 15B View FIG , and armed with five setae in all, plus outer seta of basis.

P6 ( figure 15A View FIG ) represented by median plate in anterior half of first genital somite, each vestigial leg represented by a short and thick 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 310 to 540 M m (mean, 406 M m, N ~18; allotype, 540 M m). Habitus ( figure 20A, B View FIG ), anal segment and caudal rami ( figure 20C, D View FIG ) as in female dorsally, except for longer spinules along posterior margin of cephalic shield and free thoracic somites. Ventrally as in female except for genital somite and median spinules on fourth urosomite.

Antennule ( figure 21B View FIG ) six-segmented; subchirocer. Last segment with two acute teeth.

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

P1 ( figure 22A View FIG ), as in female except for dimorphic projection on inner distal corner of basis.

P2 ( figure 22B View FIG ): praecoxa, coxa, basis and exopod as in female, except for somewhat stouter outer spines of male exopod. Endopod two-segmented; first segment small; second segment reaching about proximal third of second exopodal segment, ornamented with spinules along inner and outer margin, and armed with one outer dimorphic spine, one apical seta and two inner slender setae.

P3 ( figure 23A View FIG ) as in female except for somewhat stouter outer spines of male exopod and for dimorphic three-segmented endopod. First endopodal segment small; second segment with inner distal apophysis reaching slightly beyond third endopodal segment; second segment barely reaching tip of first exopodal segment, with one inner and one apical seta comparatively shorter than their female homologues.

P4 ( figure 23B View FIG ) as in female, except for somewhat stouter outer spines of exopod and relatively shorter setae of second endopodal segment.

Both P5 fused ( figure 21A View FIG ); exopod and baseoendopod fused. Ornamented with spinules at base of outer seta of basis, at base of exopodal and endopodal setae. Exopod with four, endopod with three setae.

P6 ( figure 21A View FIG ) represented by plate; without armature.

Variability

Male. Paratype (EMUCOP-0698-16) was found with an aberrant outer seta of left P2 ENP 2, and right P2 ENP 2 possesses two inner setae; paratype (EMUCOP-0698-20) possesses two setae only on right P5 BENP; paratype (EMUCOP-0698-15) possesses two inner setae on right P2 ENP.

Female. Paratype (EMUCOP-0698-13) was found with inner setae of left P5 BENP closer to adjoining seta than in right ramus; four female paratypes (EMUCOP-0698-10, EMUCOP-0698-12, EMUCOP-0698-03, EMUCOP-0698-06) possess one inner seta on left P2 ENP 2 and two inner setae on right P2 ENP 2; two paratypes (EMUCOP-0698-05, EMUCOP-0698-14) possess one inner seta on right P2 ENP 2 and two setae on left P2 ENP 2; paratype (EMUCOP-0698- 07) possesses an aberrant left P1 EXP 3; paratype (EMUCOP-0698-08) possesses six setae on P5 EXP; paratype (EMUCOP-0698-11) lacks inner seta on P1 ENP 1 (see table 2 View Table 2 ).