Records of chimaeroid fishes (Holocephali: Chimaeriformes) from the Pacific coast of Costa Rica, with the description of a new species of Chimera (Chimaeridae) from the eastern Pacific Ocean
Author
Angulo, Arturo
Author
López, Myrna I.
Author
Bussing, William A.
Author
Murase, Atsunobu
text
Zootaxa
2014
2014-09-18
3861
6
554
574
journal article
4098
10.11646/zootaxa.3861.6.3
38808f1d-0656-4659-bc31-0e5eee066ed6
1175-5326
5247997
8169FF7C-74C0-4385-8B67-09306D815CD2
Harriotta raleighana
Goode & Bean 1895
Pacific longnose
Chimaera
; Quimera narizona del Pacífico (Spanish)
(
Figure 1
,
Table 1
)
Material examined.
6 specimens
. UCR 2909–02,
5 males
,
1 female
,
451–641 mm
TL,
196–298 mm
BDL
; 44.95
Km
, 253.73 °
T
from
Cabo Blanco
,
Puntarenas
,
Costa Rica
(
9º26'16.44" N
,
85º29'56.04" W
),
560–620 m
,
24 November 2010
, collected by
J.M. Carvajal.
Diagnosis.
Snout elongated and pointed; tooth-plates with ridges and knobs; eyes relatively large (EYL 7.2–9.0% BDL) and virtually above mouth; dorsal-fin spine longer than height of first dorsal-fin (DSA 1.3–1.4 times in D1H); caudal-fin axis weakly raised with the fin asymmetrical, epaxial caudal-fin lobe narrower than hypaxial lobe; upper edge of caudal fin without denticles or tubercles. Additional morphometric measurements, expressed as percentage of body length (% BDL) or head length (% HDL), and comparative data are presented in
Table 1
.
TABLE 1.
Measurements and body proportions of
Harriotta raleighana
from Costa Rica and comparative material (data from
Garrick & Inada 1975
). Measurements not attainable (i.e. structure broken) or unavailable are represented with an en-dash (–).
| Measurements |
This study, n=3 |
Garrick & Inada (1975)
, n=49–66
|
| Min |
Max |
Min |
Max |
| TL (mm) |
451 |
641 |
773 |
972 |
| PCL (mm) |
302 |
465 |
431 |
694 |
| BDL (mm) |
196 |
298 |
279 |
448 |
| %BDL |
| SVL |
98.0 |
106.0 |
– |
– |
| TRL |
44.6 |
52.1 |
– |
– |
| HDL |
54.4 |
58.8 |
52.7 |
79.2 |
| SNL |
34.0 |
38.0 |
– |
– |
| SWF |
6.6 |
8.3 |
– |
– |
| SWB |
6.0 |
8.9 |
– |
– |
| SHB |
5.2 |
5.9 |
– |
– |
| PRN |
37.0 |
40.1 |
– |
– |
| POR |
39.6 |
46.6 |
36.8 |
60.7 |
| POB |
40.1 |
42.9 |
39.7 |
62.3 |
| EYL |
7.2 |
9.0 |
8.5 |
12.9 |
| EYH |
5.2 |
7.9 |
– |
– |
| PD1 |
60.6 |
63.9 |
– |
– |
| PD2 |
83.3 |
92.5 |
– |
– |
| D1B |
12.4 |
15.5 |
19.0 |
28.9 |
| D2B |
49.0 |
56.0 |
53.6 |
63.5 |
| DSA |
32.9 |
33.7 |
25.8 |
33.0 |
......continued on the next page
TABLE 1.
(Continued)
| Measurements |
This study, n=3 |
Garrick & Inada (1975)
, n=49–66
|
| Min |
Max |
Min |
Max |
| D1H |
23.2 |
26.7 |
– |
– |
| D2H |
7.0 |
7.6 |
3.9 |
6.9 |
| IDS |
11.5 |
13.1 |
– |
– |
| DCS |
15.1 |
20.7 |
– |
– |
| CTL |
53.9 |
79.8 |
– |
– |
| CDM |
41.8 |
51.5 |
– |
– |
| CDH |
2.9 |
4.3 |
3.1 |
5.3 |
| CVM |
56.7 |
65.6 |
– |
– |
| CVH |
5.5 |
7.1 |
5.8 |
9.0 |
| CPH1 |
6.3 |
8.0 |
– |
– |
| CPH2 |
4.1 |
5.8 |
– |
– |
| P1A |
39.4 |
50.3 |
37.7 |
47.9 |
| P2A |
21.1 |
24.3 |
17.6 |
24.4 |
| PPS |
38.6 |
48.9 |
– |
– |
| PCA |
40.4 |
47.0 |
– |
– |
| D1P1 |
21.9 |
26.6 |
– |
– |
| D1P2 |
44.1 |
48.3 |
– |
– |
| D2P1 |
37.3 |
42.6 |
– |
– |
| D2P2 |
26.3 |
32.0 |
– |
– |
| CLT |
16.0 |
18.3 |
16.8 |
22.5 |
| FTL |
6.2 |
7.2 |
– |
– |
| %HDL |
| TIO |
25.1 |
30.2 |
– |
– |
| ION |
16.8 |
18.6 |
– |
– |
| ONC |
21.3 |
27.1 |
– |
– |
| LNC |
11.7 |
12.6 |
– |
– |
| IOA |
9.3 |
10.6 |
– |
– |
| OPS |
2.7 |
5.2 |
– |
– |
| OTM |
20.1 |
25.9 |
– |
– |
| OCL |
10.7 |
12.5 |
– |
– |
| SLT |
10.4 |
12.6 |
– |
– |
| SPS |
12.2 |
13.9 |
– |
– |
Distribution.
This species has an apparent fragmented distribution in the three major oceans, and is likely cosmopolitan along continental margins in sub-polar oceans (
Didier
et al.
2012
, Eschmeyer 2014). Confirmed records exist in the eastern Atlantic (
Iceland
, Faeroe Islands, Rockall Trough along
Ireland
to northern
France
, Canary Islands and off Cap Blanc,
Mauritania
,
Namibia
and
South Africa
), western Atlantic (
Nova Scotia
,
Canada
to Chesapeake Bay,
U.S.A.
, and southern
Brazil
), north Pacific (off
Japan
), eastern Pacific (off
California
,
U.S.A.
,
Mexico
(Gulf of California and Central coast),
Costa Rica
(this study), and
Peru
), and southwestern Pacific (off
New Zealand
and
Australia
) (
Chirichigno 1974b
,
Garrick & Inada 1975
,
van der Heiden 1985
,
Compagno
et al.
1989
,
Krupp & Bussing 1995
,
Castro-Aguirre
et al.
2007
,
Didier & Meckley 2009
a
, Didier
et al.
2012, Eschmeyer 2014). Usually encountered at depths between 500 and
2000 m
(
Didier & Meckley 2009
a
, Didier
et al.
2012).
Remarks.
Although this species has a global distribution, in the eastern Pacific region there are no published records between
Peru
(
Didier & Meckley 2009a
) and
Mexico
(
Castro-Aguirre
et al.
2007
). The discovery of these specimens in Costa Rican waters increases the knowledge of its marine ichthyofauna and provides evidence of a broader distributional pattern for this species in the eastern Pacific region.