Cletocamptus sinaloensis, 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 : 2698-2710

publication ID	https://doi.org/10.1080/0022293031000156240
DOI	https://doi.org/10.5281/zenodo.15675955
persistent identifier	https://treatment.plazi.org/id/AF0B87BC-FE38-FFFE-FE17-FD5FFE04FC7C
treatment provided by	Felipe
scientific name	Cletocamptus sinaloensis
status	sp. nov.

Treatment

Cletocamptus sinaloensis sp. nov.

( figures 24–33 View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG )

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

Type material

One female holotype ( EMUCOP- 300392- 37) preserved in alcohol and one dissected male allotype ( EMUCOP- 300392-38 ) from Ensenada del Pabellón lagoon , five dissected female ( EMUCOP- 300491-42 , EMUCOP- 030192-69 , EMUCOP- 300392-39 , EMUCOP- 300392-40 , EMUCOP- 300392-41 ) and four dissected male paratypes ( EMUCOP- 300392-42 , EMUCOP- 300392-43 , EMUCOP- 230691-44 , EMUCOP- 240691-41 ) from Ensenada del Pabellón lagoon, and one dissected female paratype ( EMUCOP- 0100-02 ) from El Yugo estuary, seven female paratypes ( EMUCOP- 0100-01 ) from El Yugo estuary preserved in alcohol, 27 female paratypes ( EMUCOP- 300491-40 ) from Ensenada del Pabellón lagoon preserved in alcohol and one male paratype ( EMUCOP- 300491-41 ) from Ensenada del Pabellón lagoon preserved in alcohol. April and June 1991 and January and March 1992 ( Ensenada del Pabellón lagoon ) and January 2000 (El Yugo estuary), coll. S. Gómez ( Ensenada del Pabellón lagoon ) and A. C. Puello-Cruz (El Yugo estuary).

Type locality Ensenada del Pabellón lagoon , Sinaloa (24 ° 19 ’ –24 ° 35 ’ N, 107 ° 28 ’ –107 ° 45 ’ W).

Other localities

El Yugo estuary (23 ° 18 ’ 14 @ N, 106 ° 29 ’ W) and Urías system (23 ° 11 ’ 06 @ N, 106 ° 25 ’ 06 @ W), Mazatlán, Sinaloa.

Etymology

The species was named after the region (Sinaloa State) where the species was found.

Description

Female. Habitus ( figure 24A, B View FIG ) tapering posteriorly; total body length measured from tip of rostrum to posterior margin of caudal rami ranging from 510 to 750 M m (mean, 658 M m, N ~11; holotype, 560 M m). Rostrum set off, triangular, with pair of setules subapically. Cephalic shield ornamented with fine and long spinules along margin dorsolaterally ( figure 24A, 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. 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. First and second genital somites distinct dorsally and laterally, completely fused ventrally ( figure 25A View FIG ); dorsal and lateral surface of first and second genital somite with transverse rows of minute spinules, with row of longer spinules along posterior margin of both somites, and with relatively longer spinules laterally, ventrally ornamented with spinules as shown in figure 25A View FIG . Fourth and fifth urosomite as in second genital somite dorsally and laterally ( figure 24A, B View FIG ), ventral surface ornamented with transverse rows of spinules as illustrated in figure 25A View FIG . Dorsal surface of anal somite ( figure 24A, C View FIG ) ornamented with proximal transverse rows of minute spinules, with transverse rows of stronger spinules, and with dorsolateral strong spinules close to joint with caudal rami; rounded anal operculum furnished with two transverse rows of strong spinules (distalmost spinules relatively smaller) close to posterior margin ( figure 24A, C View FIG ). Caudal rami ( figures 24A, B, C, D View FIG , 25A View FIG ) about 1.5 times longer than wide; dorsal and ventral surface smooth, except for inner strong spinules close to site insertion of seta VII and close to posterior margin dorsally and ventrally; with seven elements in all.

Antennule ( figure 26A View FIG ) six-segmented; surface of segments smooth except for two rows of spinules on first segment. Armature formula, 1-(1), 2-(9), 3-(5), 4-(1z[1zae]), 5-(1), 6-(9z[1zae]).

Antenna ( figure 26B View FIG ) with small coxa ornamented with outer spinules and some inner spinules close to inner distal corner. 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 26B View FIG ), and five distal elements. Exopod one-segmented; about seven times longer than wide; armed with one lateral and one apical smooth setae.

Mandible ( figure 26C View FIG ) robust, ornamented with rows of spinules proximally; chewing edge with four strong teeth, four elements as in figure 26C View FIG , one pyriform element and one lateral pinnate strong seta. Palp one-segmented, with two long setae unequal in length, and a small seta arising nearby.

Maxillule ( figure 26D View FIG ) robust; arthrite of praecoxa ornamented with few spinules, armed with a surface seta, seven distal spines and one lateral strong seta, the latter ornamented with long spinules. Coxa ornamented with some spinules and armed with two setae. Basis ornamented with some median spinules, and armed with three apical setae; exopod and endopod represented by three setae each.

Maxilla ( figure 26E View FIG ): syncoxa ornamented with minute spinules along inner margin; with two endites, each bearing three setae. Allobasis drawn into strong claw bearing one accompanying seta. Endopod represented by three setae.

Maxilliped ( figure 26F View FIG ) subchelate. Syncoxa ornamented by two rows of spinules and armed with a small seta on inner distal corner. Basis without armature and ornamented with an anterior and a 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 27A View FIG ): praecoxa ornamented with spinules close to joint with coxa. The latter ornamented with anterior transverse rows of small spinules, with strong spinules close to outer distal corner anteriorly, and with somewhat slender spinules posteriorly. Basis ornamented with median sets 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, second segment reaching far beyond third exopodal segment. Armature formula as in table 1. View Table 1

P 2 View Table 2 ( figure 27B 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 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 27B View FIG . Endopod two-segmented, reaching distal quarter of second exopodal segment; first segment small, somewhat wider than long and ornamented with slender inner spinules; second segment ornamented with long spinules as shown in figure 27B 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 28A View FIG ): praecoxa, coxa and basis ornamented as in P2. Exopod as in P2. Endopod as in P2 except for relatively shorter second segment. Armature formula as in table 1. View Table 1

P4 ( figure 28B View FIG ): praecoxa, coxa and basis as in P2. Exopod as in P2, except for armature formula of third segment (without inner seta). Endopod two-segmented, barely reaching distal third of first exopodal segment; first segment small, somewhat wider than long; second segment ornamented with inner and outer slender spinules and armed with two apical setae.

P5 ( figure 25B 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 25B View FIG . Exopod ornamented with spinules as shown in figure 25B View FIG , and armed with five setae in all, plus outer seta of basis.

P6 ( figure 25A View FIG ) represented by median plate in anterior half of first genital somite, each vestigial leg represented by a very small and slender seta. Copulatory pore in the middle of genital double somite.

Male. Total body length measured from tip of rostrum to posterior margin of caudal rami, ranging from 570 to 610 M m (mean, 582 M m, N ~4; allotype, 570 M m). Habitus ( figure 29A, B View FIG ), anal segment and caudal rami ( figure 29C, D View FIG ) as in female dorsally, except for fewer rows of spinules on anal operculum. Ventrally as in female except for genital somite, ornamentation of third and fourth urosomites (see figure 30 View FIG ) which are coarser than in female; fifth urosomite seemingly without ornamentation ventrally.

Antennule ( figure 31A View FIG ) six-segmented; subchirocer. Last segment with two acute teeth.

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

P1 ( figure 32A View FIG ) as in female except for dimorphic projection on inner distal corner of basis.

P2 ( figure 32B 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 33A View FIG ) as in female except for relatively stouter outer spines. Endopod three-segmented; second segment with inner distal apophysis reaching beyond third endopodal segment; second segment reaching little beyond first exopodal segment, with one inner and one apical seta relatively shorter than their female homologues.

P4 ( figure 33B View FIG ) as in female, except for stouter outer spines of exopod and relatively shorter setae of second endopodal segment.

Both P5 fused ( figure 31B View FIG ); exopod and baseoendopod fused. Exopod ornamented with transverse row of strong spinules; with four setae. Endopodal lobe ornamented with sets of spinules along outer and inner margin, and at base of apical setae; with three elements in all.

P6 ( figure 30 View FIG ) represented by plate; without armature.

Variability

No variability was observed in males.

Female. Paratype (EMUCOP-300491-42) without inner seta and with two sets of spinules on left P4 EXP 3, and with one inner seta and without spinules on right P4 EXP 3; paratype (EMUCOP-300392-40) with five setae/spines on P1 EXP 3 (see table 2 View Table 2 ).